W3008: Integrated Onion Pest and Disease Management

(Multistate Research Project)

Status: Inactive/Terminating

SAES-422 Reports

01/02/2018

Buckland, K., D. Alston, J. Reeve and C. Nischwitz.  2017.  Trap crops in onion to reduce onion thrips and Iris yellow spot virus.  Southwestern Entomologist 42(1): 73-90. http://dx.doi.org/10.3958/059.042.0108.

 

Cramer, C.S.  2017.  Evaluating Iris yellow spot disease incidence and severity in onion germplasm of varying leaf characteristics.  HortScience 52:527-532.

 

Dung, J. and R. Wilson.  2017.  In search of the next DADS: continuing research on fungicides and sclerotia germination stimulants for White Rot control.  Onion World (May/June 2017):4-6.

 

Dutta, B., F. Anderson, S. Smith, and R.D. Gitaitis.  2017.  Epiphytic survival of Pantoea ananatis on Richardia scabra in Georgia.  Plant Disease 101:613-618.

 

Henrichs, B., M.L. Derie, T.D. Waters and L.J. du Toit.  2017.  The effects of arbuscular mycorrhizal inoculants on onion root colonization and growth in field trials near Connell, WA, 2016.  Plant Disease Management Reports 11:V137.

 

Henrichs, B., T.D. Waters, and L.J. du Toit.  2017.  The effect of soil phosphorus levels on colonization of onion roots by arbuscular mycorrhizal fungi, 2016-2017.  Plant Disease Management Reports 11:V125.

 

Hoepting, C.A.  2017.  Efficacy of foliar nutrient feeding on Stemphylium leaf blight on onion, 2016.  Plant Disease Management Reports 10:V129. Doi: 10.1094/PDMR11.

 

Hoepting, C.A.  2017.  Efficacy of fungicide timing on Stemphylium leaf blight on onion, 2016.  Plant Disease Management Reports 10:V130. Doi: 10.1094/PDMR11.

 

Hoepting, C.A.  2017.  Efficacy of fungicide treatments for control of Botrytis leaf blight and Stemphylium leaf blight on onion, 2016.  Plant Disease Management Reports 10:V127. Doi: 10.1094/PDMR11.

 

Hoepting, C.A.  2017.  Efficacy of fungicide treatments for control of Stemphylium leaf blight on onion, 2016.  Plant Disease Management Reports 10:V128. Doi: 10.1094/PDMR11.

 

Johnson, W., B. Dutta, F.H. Sanders, and X. Luo.  2017.  Interactions among cultivation, weeds and a bio fungicide in organic Vidalia sweet onion.  Weed Technology 31:890-896.

 

Leach, A., M. Fuchs, R. Harding, R. Schmidt-Jeffris and B.A. Nault.  2017.  Transplanted onion fields host abundant dispersing viruliferous onion thrips early to mid-season for late season Iris yellow spot virus epidemics in New York.  Plant Disease (in press) https://doi.org/10.1094/PDIS-06-17-0793-RE.

 

Leach, A., S. Reiners, M. Fuchs and B.A. Nault.  2017.  Evaluating integrated pest management tactics for onion thrips and pathogens they transmit to onion.  Agriculture, Ecosystems & Environment 250: 89-101.

 

Mazzone, J.E.  2017.  Responding to growers’ needs: evaluation of management strategies for onion center rot, caused by Pantoea ananatis and Pantoea agglomerans.  M.S. Thesis, The Pennsylvania State University, University Park, PA, May 2017.

 

Moloto, V.M., T. Goszczynska, L.J. du Toit, and T.A. Coutinho.  2017.  A new pathovar of Pseudomonas syringae, pathovar allii, isolated from onion plants exhibiting symptoms of blight. Europ. J. Plant Pathol. 146:591-603.

 

Murray, M.K., P. Jepson, S. Reitz.  2017.  An integrated pest management strategic plan for treasure valley onions: Oregon and Idaho.  Western Region Integrated Pest Management Center. https://ipmdata.ipmcenters.org/documents/pmsps/Onion_IPMSP_June_2017.pdf

 

Reitz, S.R.  2017.  Evolution of onion pest management in the treasure valley.  Onion World (February 2017) pp. 6-8.

 

Rinehold, J., N. Bell, T.D. Waters and D. McGrath.  2017.  Vegetable insect pests.  In Craig Hollingsworth (Eds.), 2015 Pacific Northwest Insect Management Handbook Corvallis, OR: Oregon State University.

 

Smith, E.A., E.J. Shields, and B.A. Nault.  2017.  Onion thrips colonization of onion fields bordering crop and non-crop habitats in muck cropping systems.  Journal of Applied Entomology 141(7): 574-582.

 

Stumpf, S., R. Gitaitis, T. Coolong, C. Riner, and B. Dutta.  2017.  Interaction of onion cultivar and growth stages on incidence of Pantoea ananatis bulb infection.  Plant Disease 101:1616-1620.

 

Waters, T.D. and J.K. Darner.  2017.  Thrips managment on dry bulb onions with the use of foliar insecticide applications, 2016.  Arthropod Management Tests 2017; 42 (1): tsx081. doi: 10.1093/amt/tsx081.

 

Zhao, X., S.R. Reitz, H. Yuan, Z. Lei, D.R. Paini, and Y. Gao.  2017.  Pesticide-mediated intraspecific competition between local and invasive thrips pests. Nature Scientific Reports. 7:40512 | DOI: 10.1038/srep40512.

01/07/2019

du Toit, L.J., Derie, M.L., Holmes, B.J., Henrichs, B.A., Winkler, L.R., Waters, T.D., and Darner, J. 2018. The effects of arbuscular mycorrhizal fungal inoculants on pink root and yield in an onion crop near Paterson, WA, 2016. Plant Disease Management Reports 12:V102.

 

du Toit, L., and Yorgey, G. 2018. Onion stunting after cereal cover crops. Page 6. Timing of glyphosate applications to wheat cover crops to reduce onion stunting caused by Rhizoctonia solani. Page 7. Efficacy of fungicide applications to manage onion stunting caused by Rhizoctonia spp. Pages 7-8. In: Strip-tillage for onions and sweet corn, Lorin Grigg. Farmer to Farmer Case Study Series on Increasing Resilience among Farmers in the Pacific Northwest. Washington State University Extension PNW702.

 

du Toit, L.J., Waters, T., Derie, M., Holmes, B., Darner, J., Henrichs, B., Knerr, J., Miller, C.E., Morgan, P., and Brouwer, L. 2018. Do AMF inoculants help onion crops? Pp. 11-12 in: 2018 Washington State University Onion Field Day Handouts. 13 pp.

 

Hoepting, C.A.  2018.  Effect of fungicide timing on Stemphylium leaf blight on onion, 2017.  Plant Disease Management Reports 12: V101.

 

Hoepting, C.A.  2018.  Efficacy of selected products for control of bacterial bulb decay in onion, 2017.  Plant Disease Management Reports 12: V143.

 

Hoepting, C.A.  2018. Effect of fungicide programs for control of Stemphylium leaf blight on onion, 2017.  Plant Disease Management Reports 12: V144.

 

Hoepting, C.A.  2018.  Efficacy of Fontelis for control of pink root in onion, 2017. Plant Disease Management Reports 12: V145.

 

Hoepting, C.A.  2018.  Efficacy of fungicide treatments for control of Stemphylium leaf blight on onion, 2017. Plant Disease Management Reports 12: V146.

 

Hoepting, C.A.  2018.  Efficacy of seed and in-furrow treatments for control of onion smut and damping off in onion, 2017.  Plant Disease Management Reports 12: ST007.

 

Kamal, N. and C.S. Cramer. 2018. Selection progress for resistance to Iris yellow spot in onions. HortScience 53:1088-1094.

 

Knerr, A.J., Wheeler, D., Schlatter, D., Sharma-Poudyal, D., du Toit, L.J., and Paulitz, T.C. 2018. Arbuscular mycorrhizal fungal communities in organic and conventional onion crops in the Columbia Basin of the Pacific Northwest USA. Phytobiomes 2: in press. http://dx.doi.org/10/.1094/PBIOMES-05-18-0022-R

 

Leach, A. B., C. A. Hoepting and B. A. Nault. 2018. Grower adoption of insecticide resistance management practices increase with extension-based program. Pest Management Science: DOI 10.1002/ps.5150.

 

Leach, A., M. Fuchs, R. Harding, R. Schmidt-Jeffris and B. A. Nault. 2018. Importance of transplanted onions contributing to late-season Iris yellow spot virus epidemics in New York. Plant Dis. 102: 1264-1272.

 

Leach, A., B. A. Nault, and C. Hoepting. 2018. Insecticide sequences to manage onion thrips in onion in 2018. Cornell Cooperative Extension, Cornell Vegetable Program Veg Edge. 14(10):  8-9.

 

Murray, M. K., P. Jepson, S. Reitz. 2017. An Integrated Pest Management Strategic Plan for Treasure Valley Onions: Oregon and Idaho. Western Region Integrated Pest Management Center.  https://ipmdata.ipmcenters.org/documents/pmsps/Onion_IPMSP_June_2017.pdf.

 

Pfeufer, E.E. and B.K. Gugino. Environmental management factors associated with bacterial diseases of onion in Pennsylvania. Plant Disease. doi.org/10.1094/PDIS-11-17-1703-RE.

 

Waters, T.D., Darner, J., Adesanya, A., Walsh, D. and Kinion, D. Entomology Research Report for Onions. In: 2018 Washington State University Onion Field Day Handouts. 13 pp.

 

Winkler, L., du Toit, L., and Waters, T. 2018. Do onion growers benefit from mycorrhizal inoculants ? The effects of mycorrhizal inoculants on onion crops in the Columbia Basin. Onion World Nov. 2018: in press.

 

Other Activities

 

  1. Abstracts and Papers at International Professional Meetings

 

du Toit, L.J., and Correll, J.C. 2018. Case studies of the complexity of seedborne and seed transmitted fungi affecting regional and global seed trade. Guest speaker, joint symposium of American Phytopathological Society (APS) and Società Italiana di Patologia Vegetale (SIPaV), 24th National Congress of SIPaV, 5-7 Sep. 2018, Ancona, Italy.

 

Leach, A., F. Hay, R. Harding, and B. Nault. 2018. Relationship between Stemphylium vesicarium and onion thrips (Thrips tabaci) in the development of Stemphylium leaf blight disease. Poster Presentation. International Congress of Plant Pathology. Boston, MA. July 29-August 3, 2018.

 

Leach, A., C. Hoepting and B. Nault. 2018. Successful adoption of action threshold-based insecticide programs for thrips management in onion. 9th International IPM Symposium. Baltimore, MD. March 21, 2018.

 

Tabassum, A., S.V. Ramesh, Y. Zhai, and H.R. Pappu. 2018. Molecular evolutionary genomics and population structure of Iris yellow spot virus (Family: Tospoviridae; Genus: Orthotospovirus). 11th International Congress of Plant Pathology, Boston, MA.  July 29-August 3, 2018.

 

  1. Abstracts and Papers at National Professional Meetings

 

Fleischer, S., T. Elkner, C. McGrady, D. Roberts, B. A. Nault, T. Rusinek, E. Grundberg, J. Ali, S. Ray and B. Lingbeek. 2018. Allium leafminer: A new invasive threat to Allium crops in North America. ESA, ESC, and ESBC Joint Annual Meeting, Vancouver, CA. November 13, 2018

 

Leach, A., S. Reiners, M. Fuchs, C. Hoepting and B. A. Nault. 2018. IPM and the human element: developing programs to control onion thrips in onion. Purdue University entomology department seminar series, West Lafayette, IN. December 6, 2018.

 

Leach, A., C. Hoepting and B. A. Nault. 2018. Increasing use of action thresholds in managing onion thrips on New York onion farms. ESA, ESC, and ESBC Joint Annual Meeting, Vancouver, CA. November 11-14, 2018.

 

Leach, A., S. Reiners and B. Nault. 2018. Evaluating effects of nitrogen fertilizer and insecticide use in managing onion thrips (Thrips tabaci) in onion. Entomological Society of America’s Eastern Branch meeting. Annapolis, MD. March 18, 2018.

 

Malla, S., M. Khanal, D. Silwal, J. Jifon, B. Patil, K. Crosby, and E. Correa. Short Day Onion Germplasm Evaluation in Southern Texas. American Society for Horticultural Science, Washington, D.C. 31 July – 3 Aug. 2018.

 

Mandal, S. and C.S. Cramer. 2018. Breeding for Fusarium basal rot resistance in short-day onions, p. 106. In: Proc. 2018 American Society for Horticultural Science Annual Conf., C. Sams (Ed.) Washington, DC. (Abstr.)

 

Nault, B. A., A. Leach, C. Hoepting, E. Moretti, and J. Scott. 2018. Adoption and Success of an IRM Program for onion thrips in onion:  So good so far! ESA, ESC, and ESBC Joint Annual Meeting, Vancouver, CA. November 12, 2018

 

Nault, B. A., S. Fleischer, E. Grundberg, T. Rusinek, D. Roberts and T. Elkner. 2018. Biology and management of Phytomyza gymnostoma: a new invasive pest of Allium crops in the eastern US. Entomological Society of America’s Eastern Branch meeting. Annapolis, MD. March 19, 2018.

 

Nault, B.A., S.R. Reitz, T.D. Waters. 2017 Current and Future Management of Onion Thrips-Transmitted Iris yellow spot virus (IYSV) in Onion. Symposium on P-IE Section Symposium: Inspiring a New Cadre of Vegetable Specialists By Sharing Expertise Related to Piercing-Sucking Insects of Economic Importance in Vegetable Production. Entomological Society of America, Denver, CO, November 2017.

Silwal, D., S. Malla, and M. Khanal. 2018. Short Day Onion (Allium cepa) Germplasm Evaluation for Agronomic and Disease Tolerance in South Texas. Southern Region American Society for Horticultural Science Meeting, Jacksonville, FL. 2-4 Feb. 2018.

 

  1. Reports at Grower Meetings and Field Days

 

Bartolo, M. Colorado Produce Day, January 2018.

 

Bartolo, M. AVRC Field Day, September 2018.

 

Bartolo, M. Specialty Crops Program Field Day, August 29, 2018.

 

Cramer, C.S. 2017. Control of onion thrips and IYS through interplant N. cataria during onion seed production. Multistate Research Project W3008: Integrated Onion Pest and Disease Management, Annual Meeting, and 2017 Great Lakes Fruit and Vegetable Expo, Grand Rapids, MI, Dec. 4, 2017.

 

Cramer, C.S. 2017. Progress for breeding for Fusarium basal rot resistance in onions. Multistate Research Project W3008: Integrated Onion Pest and Disease Management, Annual Meeting, and 2017 Great Lakes Fruit and Vegetable Expo, Grand Rapids, MI, Dec. 4, 2017.

 

du Toit, L.J. Management of Fusarium basal rot of onion. Invited presentation, Onion Session of the Pacific Northwest Vegetable Association Annual Convention & Trade Show, 14-15 Nov. 2018, Kennewick, WA. (200 people).

 

du Toit, L.J. Regionally appropriate fungicide programs for common onion pathogens in the Columbia Basin. Invited presentation, Onion Session of the Pacific Northwest Vegetable Association Annual Convention & Trade Show, 14-15 Nov. 2018, Kennewick, WA. (200 people).

 

du Toit, L.J. Impact of fungicides on plant health. Invited presentation, Pest Management Session of the Pacific Northwest Vegetable Association Annual Convention & Trade Show, 14-15 Nov. 2018, Kennewick, WA. (175 people).

 

du Toit, L.J. Complexities and synergies in large-scale conventional and organic agriculture in Washington. Invited presentation, Organic Session of the Pacific Northwest Vegetable Association Annual Convention & Trade Show, 14-15 Nov. 2018, Kennewick, WA. (150 people).

 

du Toit, L.J. Case studies of the complexity of seedborne and seed transmitted fungi affecting regional and global seed trade. Guest speaker at the joint symposium of the American Phytopathological Society (APS) and the Società Italiana di Patologia Vegetale (SIPaV), 24th National Congress of SIPaV, 5-7 Sep. 2018, Ancona, Italy. (see Abstracts above) (~250 people).

 

du Toit, L.J. Conventional and organic disease control strategies for specialty crops. Invited presentation at 2018 Colorado Fruit & Vegetable Growers’ Association Annual Meeting, 19-20 Feb. 2018, Denver, CO (50 people).

 

du Toit, L.J. Allium, bean, and crucifer seed quarantines in Washington: Current status and future needs. Annual Basin Producers’ 2018 Pesticide Recertification Day, 19 Jan. 2018, Moses Lake, WA (175 people).

 

du Toit, L.J. A review of onion diseases – identification and management. 4-hour invited presentation at the 2018 Walla Walla Onion Growers’ Meeting organized by CHS Primeland, 18 Jan. 2018, Walla Walla, WA (12 people).

 

du Toit, L.J. Allium, bean, and crucifer seed quarantines in Washington: Current status and future needs. Columbia Basin Crop Consultants’ Assoc. Short Course, 17 Jan. 2018, Moses Lake, WA (150 people).

 

du Toit, L.J. Seedborne and seed transmitted plant pathogens. Columbia Basin Crop Consultants’ Assoc. Short Course, 17 Jan. 2018, Moses Lake, WA (100 people).

Gugino, B.K. Managing bacterial diseases in vegetables, Instructor, Extension Program, New Holland Vegetable Day, Yoder's Restaurant and Buffet, 15 Jan 2018, New Holland, PA (50 participants).

 

Gugino, B.K. Vegetable disease management, Instructor, Extension Program, Ephrata Agway Vegetable Grower Meeting, Shady Maple Banquet Center, 20 Dec, 2017, East Earl, PA (250 participants).

 

Gugino, B.K. Disease management 101: Problems from 2017 and management recommendations, Quarryville Produce Growers Meeting. Hoffman Building at Solanco Fairgrounds, 14, Dec 2017, Quarryville, PA, (100 participants).

 

Gugino, B.K. Vegetable disease update and field walk, Instructor, Extension Program, Central Susquehanna Vegetable Twilight Meeting, Amos Martin Farm, 17 Jul 2018, Middleburg, PA., (72 participants).

 

Gugino, B.K. Pest and disease walk, Instructor, Extension Program, Sugar Valley Vegetable Grower Twilight Meeting, Amos Glick Farm, 16 July 2018, Loganton, PA, (15 participants).

 

Hoepting, C.A.  2018. Putting it all together; Improved SLB fungicide program – Effective, affordable and with Best Resistance Management Practices.  Empire State Producers Expo – Onion SLB Fungicide Resistance Workshop. Syracuse, NY, USA: January 16, 2018 (61 participants). 

 

Hoepting, C.A.  2018. Managing Stemphylium leaf blight of onion with fungicides in New York.  Empire State Producers Expo – Onion SLB Fungicide Resistance Workshop. Syracuse, NY, USA: January 16, 2018 (61 participants). 

 

Hoepting, C.A. 2018.  Managing Stemphylium leaf blight of onion with fungicides in New York.  Orange County Onion School.  Middleton, NY, USA: February 28, 2018 (50 participants).

 

Hoepting, C.A.  2018.  Fungicide trial demonstration in direct-seeded onion for control of Botrytis leaf blight and Stemphylium leaf blight.  Annual Oswego County Onion Growers Twilight Meeting.  Oswego, NY, USA: August 22, 2018 (45 participants).

 

Hoepting, C.A.  2018.  New seed treatment for control of onion smut.  Annual Oswego County Onion Growers Twilight Meeting.  Oswego, NY, USA: August 22, 2018 (45 participants).

 

Hoepting, C.A.  2018.  Noueautés sur le contrôle des ennemis de l-oignon/New arrivals on the control of the enemies of the onion.  Les Journées Horticoles & Grandes Cultures.  St. Rémi, Quebec, Canada: December 4, 2018 (105 particpants).

 

Jepson, P. and S. Reitz. 2018. Pesticide Resistance Management. Idaho-Malheur County Onion Growers Associations Annual Meeting.

 

Leach, A., R. Harding, M. Fuchs and B. A. Nault. 2018. Impacts of nitrogen fertilizer in muck onion production. Poster presentation. Great Lakes Fruit and Vegetable Expo, Grand Rapids, MI. December 4-6, 2018.

 

Leach, A., E. Moretti and B. A. Nault. 2018. First look at 2018 results for onion thrips and onion maggot management. Oswego onion grower twilight meeting, Oswego, NY. August 22, 2018.

 

Leach, A., S. Reiners, F. Hay, M. Fuchs, R. Harding, and B. A. Nault. 2018. Evaluating interactions between onion thrips and associated plant pathogens for improved management in onion. Sixty-seventh Annual Muck Vegetable Growers Conference.  Bradford, Ontario Canada.  March 28-29, 2018.

 

Leach, A., S. Reiners, M. Fuchs and B. A. Nault. 2018. Unravelling the interactions among variety, fertility, yield, onion thrips and diseases, and implications for improved management practices. Empire State Producers EXPO, January 17, 2018. Syracuse, NY. http://www.hort.cornell.edu/expo/proceedings/2018/Onions%20Unravelling%20Interactions%20Ashely%20Leach.pdf

 

Nault, B. A. 2018. Onion insect pest management update. Orange County Onion School.  Middleton, NY. February 28, 2018.

 

Putnam, A. Evaluation of weather-based models for management of onion downy mildew. California Garlic and Onion Symposium, UC Cooperative Extension, 12 Feb 2018, Tulare, CA.

 

Putnam, A. Downy mildew and other diseases of vegetables in desert production. Desert Research Symposium, UC Cooperative Extension and California Association of Pest Control Advisors, 28 Feb 2018, Palm Desert, CA.

 

Putnam, A. Management of downy mildew of vegetables in the Imperial Valley. Agronomic Crops and Irrigation Water Management Field Day, UC Cooperative Extension, 28 April 2018, Holtville, CA.

 

Putnam, A. Evaluation of weather-based models for management of onion downy mildew. Agronomic Crops and Irrigation Water Management Field Day, UC Cooperative Extension, 18 April 2018, Holtville, CA.

 

Reitz, S.R. 2018. Onion production tour. Malheur Summer Farm Festival, July 2018.

 

Reitz, S. 2018. Thrips/IYSV Management. Idaho-Malheur County Onion Growers Associations Annual Meeting.

 

Reitz,S. 2018. Thrips and IYSV Management in the Treasure Valley. Pacific Northwest Vegetable Association Annual Meeting.

 

Schroeder, B.K. Impact of temperature on Fusarium proliferatum and the development of bulb rot in storage. Idaho and Malheur County Onion Growers’ Association 58th Annual Meeting. 6 Feb 2018.

 

Shock, C. 2018. Incomplete Scale and heat enhance the infection of onion bulbs. Pacific Northwest Vegetable Association Annual Meeting.

 

Waters, T.D. Thrips Control in Dry Bulb Onions. Pacific Northwest Insect Management Conference, January 8, 2018 Portland, OR. (45 people).

 

Waters, T. D.  Insect IPM Update. Simplot Grower Solutions Meeting, February 6, 2018. Pasco, WA. (65 people).

 

Waters, T. D. Potato and Onion Insect IPM Update. Agrinorthwest Agronomy Meeting. February 6, 2018.  Kennewick WA. (45 people).

 

Waters, T.D. Insect Control in Potato and Onion. Corteva Regional Customer Meeting, February 15, 2018. Las Vegas, NV. (125 people).

 

Waters, T. D. Thrips and Seedcorn Maggot Control in Onions. 2018 Walla Walla Onion Growers’ Meeting organized by CHS Primeland, 18 Jan. 2018, Walla Walla, WA (12 people)

 

Waters, T.D. and L. duToit. WSU Extension Onion Field Day, 30 Aug. 2018, Hartley Farms, Benton City, WA. Presented onion mycorrhizae research update to growers, seed industry, extension personnel, researchers, etc. (125 people).

 

Water, T.D. Washington Pest Control Tour or central WA, Washington State Commission on Pesticide Registration, 24-26 Jul. 2018. Presented on vegetable seed production and research needs, including pathology research, to ~50 federal/state legislators or staff, agricultural industry representatives, WA State Dept. of Agriculture, Ecology, and Labor & Industries; WSU CAHNRS administrators, National Marine Fisheries Service, US Environmental Protection Agency, etc. on 25 Jul. near Othello, WA. (75 people).

 

Water, T.D. WSU Extension Onion Field Day, 30 Aug. 2018, Hartley Farms, Benton City, WA. Presented onion thrips research update to growers, seed industry, extension personnel, researchers, etc. (125 people).

 

  1. Newsletter Articles

 

Hoepting, C.A. 2018.  Fungicide recommendations for Botrytis leaf blight in onion.  Veg Edge, 14(12): 9-10.

 

Hoepting, C.A. 2018. New developments for managing Stemphylium leaf blight in onion: Managing fungicide resistance is crucial.  Veg Edge, 14(13): 6-8.

 

Hoepting, C.A.  2018.  New recommendations for using Surchlor (a.i. sodium hypochlorite), as in “pool chlorine”) for bacterial diseases of bulb onion.  Veg Edge, 14(14): 6-7.

 

Hoepting, C.A.  2018.  Onion thrips management after Movento.  Veg Edge, 14(15): 5-6.

 

Hoepting, C.A. 2018. Time to protect onions from downy mildew.  Veg Edge, 14(16): 3-4.

 

Hoepting, C.A.  2018.  Leafminers in onion: Native vs. Invasive species.  Veg Edge, 14(16): 6-7.

 

Hoepting, C.A.  2018.  The rot race: Trying to avoid bacterial bulb rot in onion at harvest.  Veg Edge, 14(18): 1-3.

 

Hoepting, C.A.  2018.  Harvest and post-harvest tips for best onion quality.  Veg Edge, 14(18): 6-7.

 

Hoepting, C.A.  2018. Artificial curing significantly reduces onion bacterial bulb rot.  Veg Edge, 14(22): 4-5.

 

Hoepting, C.A.  2018. EverGol Prime – New seed treatment for onion smut available now.  Veg Edge, 14(23): 6-7.

 

Hoepting, C.A.  2018.  Onion growers should make 2019 a Trigard a seed treatment year for onion maggot control.  Veg Edge, 14(23): 8-9.

 

  1. Annual Reports

 Reitz, S. R. 2018. Monitoring Onion Pests Across the Treasure Valley - 2017. pp. 128-131. In Shock C.C. (Ed.) Oregon State University Agricultural Experiment Station, Malheur Experiment Station Annual Report 2017, Department of Crop and Soil Science Ext/CrS 159. http://www.cropinfo.net/pdf/ar/2017/2017-013-OPMReport.pdf 

                                     

Reitz, S. R., Shock, C. C., Feibert, E. B. G., Rivera, A., and Saunders, L. D. 2018. Thrips and Iris Yellow Spot Virus Management in the Treasure Valley. pp. 113-127. In Shock C.C. (Ed.) Oregon State University Agricultural Experiment Station, Malheur Experiment Station Annual Report 2017, Department of Crop and Soil Science Ext/CrS 159. http://www.cropinfo.net/pdf/ar/2017/2017-012-InsecticideRotation.pdf  

Shock, C. C., Feibert, E. B. G., Rivera, A., Wieland, K. D., & Saunders, L. D. 2018. Onion internal quality in response to artificial heat and heat mitigation during bulb development. pp. 42-59. In Shock C.C. (Ed.) Oregon State University Agricultural Experiment Station, Malheur Experiment Station Annual Report 2017, Department of Crop and Soil Science Ext/CrS 159. http://www.cropinfo.net/AnnualReports/2017/2017-004-OnionIntRotHeat.php 

Shock, C. C., Feibert, E. B. G., Rivera, A., & Saunders, L. D. 2018. Timing the Occurrence of Internal Quality Problems in Onion Bulbs. pp. 60-72. In Shock C.C. (Ed.) Oregon State University Agricultural Experiment Station, Malheur Experiment Station Annual Report 2017, Department of Crop and Soil Science Ext/CrS 159. http://www.cropinfo.net/AnnualReports/2017/2017-006-OnionDiatom.php

Shock, C. C. Feibert, E. B. G., Rivera, A., & Saunders, L. D. 2018. Evaluation of Chlorine and Diatomaceous Earth for Control of Internal Decay in Onion Bulbs. pp. 73-79. In Shock C.C. (Ed.) Oregon State University Agricultural Experiment Station, Malheur Experiment Station Annual Report 2017, Department of Crop and Soil Science Ext/CrS 159. http://www.cropinfo.net/AnnualReports/2017/2017-006-OnionDiatom.php

 

  1. Internet Resources

 

Alliumnet.com: Provides a list of research and extension specialists working on pests and diseases; focuses on collaboration among research, extension and industry http://alliumnet.bugwoodcloud.org

 

Colorado Research results are available on our web site: http://adamscountextension.com

CSU Specialty Crops:  https://specialtycrops.agsci.colostate.edu/research-and-projects/

 

Hoepting, C.A.  2018. Cornell onion fungicide “cheat sheet” for leaf diseases, 2018. Cornell Cooperative Extension - Cornell Vegetable Program. Online: https://rvpadmin.cce.cornell.edu/uploads/doc_689.pdf.  

 

Nault, B.A. and A. Leach.  2018. Guidelines for 2018 Onion thrips management in Onion. Decision Diagram. Cornell Cooperative Extension - Cornell Vegetable Program. Online: https://rvpadmin.cce.cornell.edu/uploads/doc_685.pdf.

 

Oregon State University Malheur Experiment Station: Cropinfo.net

 

Pacific Northwest Vegetable Extension Group (PNW VEG), a tri-state (OR, WA, ID) consortium of 25 university and USDA ARS vegetable researchers and extension specialists met monthly by conference call during the 2018 field season, from May through October, to discuss vegetable production status in the region, including pest, disease, and other issues affecting production of onion and other vegetables. The team website was updated regularly, including the Photo Gallery and other resources for vegetable stakeholders : http://mtvernon.wsu.edu/path_team/diseasegallery.htm

 

Wohleb, C.H., Waters, T.W., and du Toit, L.J. 2018. Washington State University Extension Onion Alerts. Contributed disease information and photos for WSU Onion Alerts released online on 24 Apr., 23 May, 31 May, 3 Jul., 16 Aug., 27 Aug., 1 Oct., and 31 Oct. 2018. https://us13.campaign-archive.com/?u=2eff8714011ff4bfba18a0704&id=d75dc96e7f

09/21/2019

Journal articles:

Hay, F., Sharma, S., Hoepting, C.A., Strickland, D., Luong, K. and Pethybridge, S.J. 2019. Emergence of Stemphylium Leaf Blight of Onion in New York Associated with Fungicide Resistance. Plant Disease, (ja).

 

Knerr, A.J., Wheeler, D., Schlatter, D., Sharma-Poudyal, D., du Toit, L.J., and Paulitz, T.C. 2019. Arbuscular mycorrhizal fungal communities in organic and conventional onion crops in the Columbia Basin of the Pacific Northwest USA. Phytobiomes 2:194-207.

 

Leach, A.B., Fuchs, M. Harding, R.S. and Nault, B.A. 2019. Iris yellow spot virus prolongs the adult lifespan of its primary vector, onion thrips (Thrips tabaci). Journal of Insect Science 19(3):1-4. https://doi.org/10.1093/jisesa/iez041

 

Leach, A.B., Hay, F., Harding, R.S. Damann, K.C. and Nault, B.A. 2019. Relationship between onion thrips (Thrips tabaci) and Stemphylium versicarium in the development of Stemphylium leaf blight in onion. Annals of Applied Biology (in press).

 

Leach, A.B., Hoepting, C.A. and Nault, B.A. 2019. Grower adoption of insecticide resistance management practices increase with extension-based program. Pest Management Science 75:515-526.

 

Murray, M.K., Reitz, S. and Jepson, P. 2019. An Integrated Pest Management Strategic Plan for Treasure Valley Onions: Oregon and Idaho. Western Region Integrated Pest Management Center.  (in press)

 

Moretti, E.A., Harding, R.S., Scott, J.G. and Nault, B.A. 2019. Monitoring onion thrips (Thysanoptera: Thripidae) susceptibility to spinetoram in New York onion fields. Journal of Economic Entomolology. 112(3):1493-1497.

 

Rahimi, S., Hseih, S., Renlin, Xu., Avis, Tyler, A., Smith, D., Dutta, B., Gitaitis, R. and Tambong, J. 2019. Pathogenicity and a TaqMan real-time PCR for specific detection of Pantoea allii, a bacterial pathogen of onions. Plant Disease (in press).

 

Peer-reviewed technical reports:

Dutta, B., Riner, C., Edenfield, J., Tyson, C., Tanner, S., Williams, Z., Shirley, A. and Earls, C. 2019. Evaluation of onion growth stage directed chemical applications on center rot incidence in onion bulbs in Georgia, 2018. PDMR13:V020.

 

Dutta, B., Edenfield, J., Tanner, S., Williams, Z. and Riner, C. 2019. Evaluation of fungicides to manage Downy mildew in Toombs County, Georgia, 2018. PDMR 13:V019.

 

Dutta, B., Foster, M.J., Donahoo, W.M., Coolong, T. and Riner, C. 2018. Evaluation of a pre-plant fumigant and a post-plant fungicide on the control of Fusarium wilt of watermelon in Toombs County, Georgia 2017. PDMR 12:V141.

 

du Toit, L.J., Derie, M.L., Holmes, B.J., Miller, C.E., Brouwer, L.R., Waters, T.D. and Darner, J. 2019. Effects of the arbuscular mycorrhizal fungi inoculant Mykos Gold Granular on pink root and yield in commercial onion bulb crops near Irrigon, OR, 2017. Plant Disease Management Reports 13:V008.

 

du Toit, L.J., Derie, M.L., Holmes, B.J., Morgan, P., Brouwer, L.R. and Waters, T.D. 2019. The influence of soil phosphorus levels on onion root colonization by mycorrhizal fungi from commercial inoculants, 2017. Plant Disease Management Reports 13:V009.

 

du Toit, L.J., Derie, M.L., Holmes, B.J., Henrichs, B.A., Winkler, L.R., Waters, T.D. and Darner, J. 2018. The effects of arbuscular mycorrhizal fungal inoculants on pink root and yield in an onion crop near Paterson, WA, 2016. Plant Disease Management Reports 12:V102.

 

Extension publications:

Dutta, B., Schmidt, J., and Johnson, W.C.  2019. Challenges faced by the organic and the organic-transition Vidalia onion growers in Georgia. In: VSC News Magazine. April 2019.

 

Hayden, Z.D., Leach, A. and Nault, B. 2019. Nitrogen: Is less more? Studies in Michigan and New York highlight potential for reducing nitrogen rates on muck soils. Onion World  35 (5):14-16.

 

Hoepting, C. 2019. Control of onion downy mildew when disease pressure is high.  Cornell Cooperative Extension, Cornell Vegetable Program Veg Edge. 15(15):3-5.

 

Hoepting, C. 2019. Onion diseases of August.  Cornell Cooperative Extension, Cornell Vegetable Program Veg Edge. 16(17):6.

 

Hoepting, C. 2019. Stretching onion fungicide spray programs to preserve useful longevity of FRAC 3/7.  Cornell Cooperative Extension, Cornell Vegetable Program Veg Edge. 15(17):3-4.

 

Hoepting, C. 2019. News on fungicide resistance in New York and consequent changes to 2019 fungicide recommendations for Stemphylium and Botrytis leaf blight in onion.  Cornell Cooperative Extension, Cornell Vegetable Program Veg Edge. 15(12):6-8.

 

Hoepting, C. 2019. Control of onion downy mildew with fungicides.  Cornell Cooperative Extension, Cornell Vegetable Program Veg Edge. 15(10): 9.

 

Hoepting, C. 2019. Scouting tips for identifying downy mildew in onion.  Cornell Cooperative Extension, Cornell Vegetable Program Veg Edge. 15(10):8.

 

Hoepting, C. 2019. My big fat onion variety nitrogen rot project.  In: Proceedings of the 2019 Empire State Producers Expo, Syracuse, NY: 14-17 January, 2019. Online: http://www.hort.cornell.edu/expo /pdf/20190116-1-hoepting.pdf.

 

Hoepting, C. and Nault, B. 2019. 2019 Cornell guidelines for onion thrips management in onion. Cornell Cooperative Extension, Cornell Vegetable Program Veg Edge. 15(14): 8-9.

 

du Toit, L. and Yorgey, G. 2018. Onion stunting after cereal cover crops. Page 6. Timing of glyphosate applications to wheat cover crops to reduce onion stunting caused by Rhizoctonia solani. Page 7. Efficacy of fungicide applications to manage onion stunting caused by Rhizoctonia spp. Pages 7-8. In: Strip-tillage for onions and sweet corn, Lorin Grigg. Farmer to Farmer Case Study Series on Increasing Resilience among Farmers in the Pacific Northwest. Washington State University Extension PNW702.

 

Popular periodicals:

Iglesias, L. and Nault, B. 2019. Tackling thrips in organic onions. Onion World 35(5): 7-9.

Winkler, L., du Toit, L., and Waters, T. 2019. Mycorrhizal inoculants: Yea or nay? The effects of mycorrhizal        inoculants on onion crops in the Columbia Basin. Onion World Feb. 2019:10-14. https://issuu.com/columbiamediagroup/docs/feb_2019_onion_world_web?e=34405975/67413329

 

Other Activities

 

  1. Abstracts and Papers at International Professional Meetings

 

du Toit, L.J., Waters, T.W., Derie, M.L. and Brouwer, L. 2019. Can onion growers benefit from mycorrhizal inoculants? 2019 combined meeting of the National Onion Association, National Allium Research Conference and International Allium Research Symposium, 24-27 July, 2019, Madison, WI. (Abstract)

 

Singh, N. and Cramer, C.S. 2019. Improved tolerance for onion thrips and Iris yellow spot in onion plant introductions after two selection cycles. Horticulturae 5:18. doi 10.3390/horticulturae5010018.

Mandal, S. and Cramer, C.S. 2019. Progress made for Fusarium basal rot resistance, p. 17. In: Proc. 2019 International Allium Research Symposium. M. Havey (Ed.) Madison, WI. (Abstract)

 

Mandal, S. and Cramer, C.S. 2019. Selection for Fusarium basal rot resistance using an artificial inoculation mature bulb method, p. 29. In: Proc. 2019 International Allium Research Symposium. M. Havey (Ed.) Madison, WI. (Abstract)

 

Kvitko, B., Stice, S. and Dutta, B. 2019. The best offense is a good defense: plasmid-borne allicin tolerance genes make major contributions to Pantoea spp. virulence on onion. International Allium Research Conference, Madion WI, 24 July, 2019.

 

  1. Abstracts and Papers at National Professional Meetings

 

Agarwal, G., Kvitko, B., Stice, S. and Dutta, B. 2019. Whole genome sequencing of Pantoea ananatis strains to identify variants linked to onion virulence. International Allium Research Conference, 24 July, 2019, Madion WI.

 

Ilyas, U., Raizada, M., du Toit, L.J. and McDonald, M.R. 2019. Mycorrhizal fungi in the roots of onion and carrot in relation to mycorrhizal fungal inoculant and soil phosphorus. Plant Canada 2019, 7-10 July, 2019, University of Guelph, Ontario, Canada. (Abstract 192)

 

Kvitko, B., Stice, S. and Dutta, B. 2019. A chemical arms race in onions: plasmid-borne allicin tolerance genes make major contributions to Pantoea spp. virulence on onion. American Phytopathological Society-Plant Health 2019. Cleveland, OH, 6 August, 2019.

 

Mandal, S. and Cramer, C.S. 2019. Identification of steroidal saponins in onion basal plate tissue involved in plant defense against Fusarium oxysporum f. sp. cepae, In: Proc. 2019 National Allium Research Conference. M. Havey (Ed.) Madison, WI. (Abstract)

 

Mandal, S. and Cramer, C.S. 2019. Progress made for Fusarium basal rot resistance. In: Proc. 2019 National Allium Research Conference. M. Havey (Ed.) Madison, WI. (Abstract)

 

Mandal, S. and Cramer, C.S. 2019. Selection for Fusarium basal rot resistance using an artificial inoculation mature bulb method. In: Proc. 2019 National Allium Research Conference.  M. Havey (Ed.) Madison, WI. (Abstract)

 

Scott, J.C., Jeliazkova, E., Cheng, Q., Qian, Y., Qian, M. and Dung, J.K.S. 2019. Evaluation of alternatives to soil fumigants and diallyl disulfide for the management of white rot. National Allium Research Conference, Madison, WI.

 

Stice, S., Dutta, B. and Kvitko, B.H. 2019. Gene cluster in onion bulb rotting bacteria contributes to virulence by conferring tolerance to reactive sulfur species. Annual Meeting of Southern Division American Phytopathological Society in Gainesville, FL (7-9 February, 2019)

 

 

 

 

 

  1. Reports at Grower Meetings and Field Days

 

Cramer, C.S. 2019. Evaluation of onion germplasm to mitigate the effects of Iris yellow spot virus. Multistate Research Project W3008: Integrated Onion Pest and Disease Management, Annual Meeting, Madison, WI, 24 July, 2019.

 

Cramer, C.S. 2018. Progress for breeding for Fusarium basal rot resistance in onions. Multistate Research Project W3008: Integrated Onion Pest and Disease Management, Annual Meeting, and 2018 Pacific Northwest Vegetable Growers Association Annual Meeting, Kennewick, WA, 13 November, 2018.

 

Dung, J. 2019. White Rot Research: USDA-NIFA Grant Update. Invited speaker. California Garlic and Onion Research Advisory Board Allium Research Symposium. 11 February, 2019. Tulare, CA (~60 attendees)

 

du Toit, L.J. 2019. Specialty vegetable seed production. Invited presentation, Western Region IR-4 SLR/CLC Meeting, 9-10 April, 2019, Mount Vernon, WA. (25 people)

 

du Toit, L.J. 2019. Regionally appropriate fungicide programs. Invited presentation, Wilbur Ellis Grower Meeting, 21 Febuary, 2019, La Conner, WA. (50 people)

 

du Toit, L.J. 2019. Onion disease management. Invited presentation and discussion with Agri Northwest growers, 7 February 2019, Pasco, WA. (50 people)

 

du Toit, L.J. 2019. Late-season disease management in onion production. Invited presentation at Clearwater Supply Winter Growers’ Meeting, 6 February, 2019, Ontario, OR. (75 people)

 

du Toit, L.J. 2019. Regionally appropriate fungicide programs. Invited presentation, Columbia Basin Crop Consultants Association Short Course, 4-5 February, 2019, Moses Lake, WA. (150 people)

 

du Toit, L.J. 2019. Management of Rhizoctonia in onion seedbeds and direct-drilled crops, and postharvest management of black mold in onion crops. Invited presentation, KORKOM onion growers, 23 January, 2019, Ceres, South Africa. (15 people)

 

du Toit, L.J. 2019. Appropriate use of fungicides. Invited presentation, Columbia Basin Vegetable Seed Association Annual Meeting, 15 February, 2019, Moses Lake, WA. (75 people)

 

du Toit, L.J. 2019. Appropriate use of fungicides. Invited presentation, Annual Basin Producers’ 2019 Pesticide Recertification Day, 14 February, 2019, Moses Lake, WA. (275 people)

 

du Toit, L.J. 2018. Management of Fusarium basal rot of onion. Invited presentation, Onion Session of the Pacific Northwest Vegetable Association Annual Convention & Trade Show, 14-15 November, 2018, Kennewick, WA. https://pnva.org/2018-pnva-conference-presentations/ (200 people)

 

du Toit, L.J. Regionally appropriate fungicide programs for common onion pathogens in the Columbia Basin. Invited presentation, Onion Session of the Pacific Northwest Vegetable Association Annual Convention and Trade Show, 14-15 November, 2018, Kennewick, WA. https://pnva.org/2018-pnva-conference-presentations/ (200 people)

 

Ingham, R. and Waters, T.D. 2018. Nematode management in onions. Pacific Northwest Vegetable Association Annual Convention and Trade Show, Kennewick, WA. (200 people).

 

Malla, S. 2019. Vegetable & Wheat Spring Field Day. Texas A&M AgriLife Research & Extension Center, Uvalde, TX. May, 2019.

 

Mandal, S. and Cramer, C.S. 2019. Progress made for Fusarium basal rot resistance. 2019 National Onion Association Summer Convention, Madison, WI. July 24-27, 2019.

 

Mandal, S. and Cramer, C.S. 2019. Selection for Fusarium basal rot resistance using an artificial inoculation mature bulb method. 2019 National Onion Association Summer Convention, Madison, WI. July 24-27, 2019.

 

Mandal, S. and Cramer, C.S. 2019. Identification of steroidal saponins in onion basal plate tissue involved in plant defense against Fusarium oxysporum f. sp. cepae. 2019 National Onion Association Summer Convention, Madison, WI. July 24-27, 2019.

 

Reitz, S. 2018. Thrips and IYSV Management in the Treasure Valley. Pacific Northwest Vegetable Association Annual Meeting.

 

Reitz, S. 2019. Thrips/IYSV Management. Idaho-Malheur County Onion Growers Associations Annual Meeting Soilborne disease management in carrot, onion, brassica, and beetroot production in sandy soils of the Sandveld region of South Africa. Invited discussion/workshop with agronomists and production managers for Laastedrif Farm, 23 January, 2019, Ceres, South Africa. (12 people)

 

Waters, T.D. 2018. Thrips Management in Dry Bulb Onions. SW Ag Summit, Yuma, AZ. (100 people).

 

Waters, T.D. 2018. Thrips control in dry bulb onions. Pacific Northwest Insect Management Conference, Portland, OR. (60 people).

 

Waters, T.D. 2018. Insect control in potato and onion. Corteva Regional Customer Meeting, Las Vegas, NV. (60 people).

 

Waters, T.D. 2018. Thrips and seedcorn maggot control in onions. 2018 Walla Walla Onion Growers’ Meeting organized by CHS Primeland. Walla Walla, WA. (20 people).

 

Waters, T.D. 2018. Potato and onion insect IPM update. Agri Northwest Agronomy Meeting. Kennewick WA. (50 people).

 

  1. Newsletter Articles

 

WSU Onion Alerts (https://mailchi.mp/wsu/wsu-onion-alert-aug-14-1303793?e=72ba613792): Time-sensitive topics covered in seven articles between 30 May  and 21 August  of 2019 included downy mildew, fungicides, thrips, nematodes, iris yellow spot, irrigation, and powdery mildew.

 

Gugino, B.K. 2019. Black mold on onion and other common diseases on onion. Pennsylvania Vegetable Disease Update. 3 July, 2019. https://extension.psu.edu/vegetable-disease-updates-for-july-3-2019.

 

Putman, A.I. 2019. Downy mildew of vegetables in Imperial County. Imperial County Agricultural Briefs 22(3): 39-42.

Putman, A.I. 2019. Transition period from downy mildew to powdery mildew. Imperial County Agricultural Briefs 22(4): 76-78.

 

Winkler, L., du Toit, L. and Waters, T. 2019. Mycorrhizal inoculants: Yea or nay? The effects of mycorrhizal inoculants on onion crops in the Columbia Basin. Onion World February, 2019:10-14. https://issuu.com/columbiamediagroup/docs/feb_2019_onion_world_web?e=34405975/67413329

 

  1. Annual Reports

Cramer, C.S. Evaluation of onion germplasm to mitigate the effects of Iris yellow spot virus. Sustainable Agriculture Field Day. Las Cruces, NM. June 26, 2019.

Dung, J. and Scott, J. 2018. Microplot evaluation of sclerotia germination stimulants for white rot control in garlic. Central Oregon Agricultural Research and Extension Center 2018 Annual Report: 26-28.

 

Reitz, S.R. 2019. Monitoring Onion Pests Across the Treasure Valley - 2018. pp. 111-115. In Shock C.C. (Ed.) Oregon State University Agricultural Experiment Station, Malheur Experiment Station Annual Report 2018, Department of Crop and Soil Science Ext/CrS 161.

 

Reitz, S.R., Trenkel, I. Wieland, K., Shock, C.C., Feibert, E.B.G. and Rivera, A. 2019. Thrips and Iris Yellow Spot Virus Management in the Treasure Valley. pp. 116-134. In Shock C.C. (Ed.) Oregon State University Agricultural Experiment Station, Malheur Experiment Station Annual Report 2018, Department of Crop and Soil Science Ext/CrS 161.

 

Reitz, S.R., Trenkel, I. Wieland, K., Shock, C.C., Feibert, E.B.G. and Rivera, A. 2019. Effects of Drip Applications of Fontelis Fungicide for Pink Root Management. pp. 111-115. In Shock C.C. (Ed.) Oregon State University Agricultural Experiment Station, Malheur Experiment Station Annual Report 2018, Department of Crop and Soil Science Ext/CrS 161.

 

  1. Internet Resources

Pacific Northwest Vegetable Extension Group (PNW VEG) website (http://mtvernon.wsu.edu/path_team/vegpath_team.htm), a tri-state Extension team with resources on diverse vegetables grown in the PNW USA. Sections on onions include the Photo Gallery (http://mtvernon.wsu.edu/path_team/onion.htm) and IPM Resources (http://mtvernon.wsu.edu/path_team/ipmResources.htm#onion).

Wyenandt, A., Koehler, A., Everts, Rideout, K.S. and Gugino, B. 2019. Fungicide Resistance Management Guidelines for Vegetable Crops Grown in the mid-Atlantic Region – 2019. https://extension.psu.edu/2019-fungicide-resistance-management-guidelines-for-vegetable-crops. (contains a table for onion)

Reitz, S.R. and Dung, J. 2019. Cropinfo.net https://agsci.oregonstate.edu/mes/malheur-experiment-station

04/01/2021

Publications (October 1, 2019 to December 30, 2020) (25906 characters w/spaces)

Agarwal, G., Choudhary, D., Stice, S.P., Myers, B.K., Gitaitis, R.D., Venter, S.N., Kvitko, B.H., and Dutta, B. 2020. Pan-genome-wide analysis of Pantoea ananatis identified genes linked to pathogenicity in onion. BioRxiv doi: https://doi.org/10.1101/2020.07.24.219337

Alyokhin, A., B. Nault and B. Brown. 2020. Soil conservation practices for insect pest management in highly disturbed agroecosystems – a review. Entomol. Exp. Appl. 168: 7-27. https://doi: 10.1111/eea.12863.

Beck, K. D., Reyes-Corral, C., Rodriguez-Rodriguez, M., May, C., Barnett, R., Thornton, M.K., Bates, A. A., Woodhall, J. W., B. K. Schroeder. 2020 First report of Fusarium proliferatum causing necrotic leaf lesions on onion (Allium cepa) and association with increased incidence of onion bulb rot in Southern Idaho. Plant Disease: 2020. https://doi.org/10.1094/PDIS-06-20-1399-PDN.

Brown L, Harrington S, Harrington M, Murdock MR, Pizolotto CA, Woodhall JW (In press). Rhizoctonia solani AG 2-2 IIIB causing root rot of onion in Idaho. Plant Disease.

du Toit, L.J., Brouwer, L.R., Derie, M.L., Henrichs, B.A., Holmes, B.J., and Waters, T.D. 2020. The effect of formulation and application method of commercial arbuscular mycorrhizal fungi inoculants on onion seedlings in a growth chamber study, 2016. Plant Disease Management Reports 14:V059.

du Toit, L.J., Derie, M.L., Holmes, B.J., Miller, C.E., Brouwer, L.R., Waters, T.D., and Darner, J. 2020. Effects of three arbuscular mycorrhizal fungi inoculants on pink root and yield in a commercial onion bulb crop near Othello, WA, 2017. Plant Disease Management Reports 14:V061.

du Toit, L.J., Derie, M.L., Holmes, B.J., Miller, C.E., Morgan, P., Brouwer, L.R., Waters, T.D., and Darner, J. 2020. Effects of Mykos Gold Granular, an arbuscular mycorrhizal fungi inoculant, on pink root, white rot, and crop growth in spring- and fall-planted sweet onion crops near Walla Walla, WA, 2017-2018. Plant Disease Management Reports 14:V060.

du Toit, L.J., Derie, M.L., Holmes, B.J., Winkler, L.R., Waters, T.D., and Darner, J. 2020. Effects of an arbuscular mycorrhizal fungal inoculant and a mycorrhizal stimulant on pink root and productivity of dehydration onion crops near Paterson, WA, 2016. Plant Disease Management Reports 14:V062.

Hay, F.S., Sharma, S., Hoepting, C., Strickland, D., Luong, K., Pethybridge, S.J. 2019.  Emergence of Stemphylium leaf blight of onion in New York associated with fungicide resistance.  Plant Disease 103, 3083-3092. https://doi.org/10.1094/PDIS-03-19-0676-RE.

Hoepting, C.A. Onion smut: Old problem, new solution – Excellent debut by new seed treatment for onion smut in New York muck onions.  Onion World, 36(6): 6-9.

Hoepting, C.A. and L.J. du Toit. 2020.  Stop the Rot! National team to combat bacterial diseases of onion with fierce collaboration.  Onion World, 36(5): 8-11.

Hoepting, C.A., S.K. Vande Brake and E.R. van der Heide.  2020. Variety evaluation for bacterial bulb decay in onion, 2019. Plant Disease Management Report 14:V218. https://doi-org.proxy.library.cornell.edu/10.1094/PDMR14.

Hoepting, C.A., S.K. Vande Brake and E.R. van der Heide.  2020. Efficacy of fungicide treatments for control of Stemphylium leaf blight and Botrytis leaf blight in onion, Sodus, 2019. Plant Disease Management Report 14:V219. https://doi-org.proxy.library.cornell.edu/10.1094/PDMR14.

Hoepting, C.A., S.K. Vande Brake and E.R. van der Heide.  2020. Efficacy of fungicide treatments for control of Stemphylium leaf blight and Botrytis leaf blight in onion, Elba, 2019. Plant Disease Management Report 14:V220. https://doi-org.proxy.library.cornell.edu/10.1094/PDMR14.

Hoepting, C.A., S.K. Vande Brake and E.R. van der Heide.  2020. Effect of fungicide application timing on control of Botrytis leaf blight and Stemphylium leaf blight in onion, 2019. Plant Disease Management Report 14:V221. https://doi-org.proxy.library.cornell.edu/10.1094/PDMR14.

Hoepting, C.A., S.K. Vande Brake and E.R. van der Heide.  2020. Efficacy of early timed fungicide application on control of Botrytis leaf blight and relationship with Stemphylium leaf blight in onion, 2019. Plant Disease Management Report 14:V222. https://doi-org.proxy.library.cornell.edu/10.1094/PDMR14.

Iglesias, L., and B.A. Nault. 2020. Onion maggot control using insecticide transplant treatments for onion, 2018. Arthropod Management Tests 45(1): tsaa093, https://doi.org/10.1093/Amt/tsaa093.

Iglesias, L., and B. A. Nault. 2020. Onion maggot control using insecticide transplant treatments for onion, 2019. Arthropod Management Tests 45(1): tsaa069, https://doi.org/10.1093/Amt/tsaa069.

Iglesias, L., and B. Nault. 2020. Bioinsecticides and cultural controls for onion thrips in organic onions. . Cornell Cooperative Extension, Cornell Vegetable Program. VegEdge 16(11):  6-7.

Iglesias, L. and B. Nault. 2020. Allium leafminer is no minor inconvenience: Updates from the northeastern US. Onion World  36(3): 6-9.

Iglesias, L.E., R.L. Groves, B. Bradford, R.S. Harding, and B.A. Nault. 2021. Evaluating combinations of bioinsecticides and adjuvants for managing Thrips tabaci (Thysanoptera: Thripidae) in onion production systems. Crop Protection 142 doi.org/10.1016/j.cropro.2020.105527.

Iglesias, L.E., M.J. Havey, and B.A. Nault. 2021. Potential for managing onion thrips (Thrips tabaci) in organic onion production systems using multiple IPM tactics. Insects (in press).

Koirala, S., Zhao, M., Agarwal, G., Stice, S., Gitaitis, R.., Kvitko, B., and Dutta, B. 2021. Identification of two novel pathovars of Pantoea stewartii subsp. indologenes affecting Allium sp. and millets. Phytopathology (in press).

Leach, A. B., F. Hay, R. S. Harding, K. C. Damann and B. A. Nault. 2020. Relationship between onion thrips (Thrips tabaci) and Stemphylium versicarium in the development of Stemphylium leaf blight in onion. Annals Appl. Biol. 176(1): 55-64. https://doi:10.1111/Aab.12558.

Leach, A., B., S. Reiners and B. Nault. 2020. Optimizing integrated pest management: A case study managing onion thrips and bacterial bulb rot in onion. Crop Prot. 133 (https://doi.org/10.1016/j.cropro.2020.105123). 

Mandal, S. and C.S. Cramer. 2020. An artificial inoculation method to select mature onion bulbs resistant to Fusarium basal rot. HortScience 55:1840-1847 https://doi.org/10.21273/HORTSCI15268-20.

Mandal, S., A. Saxena, C.S. Cramer, and R.L. Steiner. 2020. Comparing efficiencies of two selection approaches for improving Fusarium basal rot resistance in short-day onion after a single cycle of selection. Horticulturae 6:26. doi 10.3390/horticulturae6020026.

Moretti, E. A., and B. A. Nault. 2020. Onion maggot control in onion, 2019. Arthropod Management Tests 45(1): tsaa007, https://doi.org/10.1093/Amt/tsaa007.

Moretti, E.A., A.G. Taylor, K. Wickings, B.A. Nault. 2021. Insights into how spinosad seed treatment protects onion from onion maggot (Diptera: Anthomyiidae). J. Econ. Entomol. doi: 10.1093/jee/toaa332.

Moretti, E.A., K. Wickings, and B.A. Nault. 2021. Environmental factors and production practices that affect Delia antiqua damage in onion fields. Agric. Ecosyst. Environ. (in press 2-21-21)

Nault, B., and C. Hoepting. 2020. Onion seed treatment recommendations for 2021 featuring Trigard for onion maggot control. VegEdge 16(24):  4-5.

Nault, B., and C. Hoepting. 2020. Insecticide programs to consider for onion thrips control in onion in 2020. VegEdge 16(14):  8-9.

Nault, B.A., L.E. Iglesias, R.S. Harding, E.A. Grundberg, T. Rusinek, T. Elkner, B. Lingbeek and S.J. Fleischer. 2020. Managing allium leafminer (Diptera: Agromyzidae): an emerging pest of allium crops in North America. J. Econ. Entomol. 113(5): 2300-2309 (https://doi.org/10.1093/jee/toaa128).

Resende, R., A.E. Whitfield, and H.R. Pappu. 2020. Orthotospoviruses (Tospoviridae). Encyclopedia of Virology. 4th edition. Elsevier Press. In press.

Sharma, S., F. S. Hay, and S. J. Pethybridge. 2020. Genome resource for two Stemphylium vesicarium isolates causing Stemphylium leaf blight of onion in New York. Mol. Plant Microbe Inter. 33:562-564. https://doi.org/10.1094/MPMI-08-19-0244-A.

Stice, P., Shin, G.Y., Armas, S.D., Koirala, S., Galvan, G.A., Siri, M.I., Severns, P.M., Coutinho, T.A., Dutta, B., and Kvitko, B. 2021. The distribution of onion virulence gene clusters among Pantoea spp. Frontiers in Microbiology https://doi.org/10.3389/fmicb.2021.00184.

Stice, S., Thao, K.K., Khang, C.K., Baltrus, D.A., Dutta, B., and Kvitko, B.H. 2020. Thiosulfinate tolerance is a virulence strategy of an atypical bacterial pathogen of onion. Current Biology 30:3130-3140.

Stumpf, S., Leach, L., Srinivasan, R., Coolong, T., Gitaitis, R., and    Dutta, B. 2020. Foliar chemical protection against Pantoea ananatis in onion is negated by thrips feeding.  Phytopathology 111: 258-267.

Willett, D., C. Filgueiras, J. Nyrop and B. Nault. 2020. Attract and kill: Spinosad containing spheres to control onion maggot (Delia antiqua). Pest Management Science https://doi.org/10.1002/ps.5818.

Willett, D., C. Filgueiras, J. Nyrop and B. Nault. 2020. Field monitoring of onion maggot (Delia antiqua) fly through improved trapping. J. Applied Entomology https://doi.org/10.1111/jen.12740.

Woodhall, J. W., Harrington, M., Keith, S. Oropeza, A., Thornton, M. and B. K. Schroeder. 2020. First report of root rot caused by Pythium myriotylum of onion in Idaho.  Plant Disease 104:9, 2529, https://doi.org/10.1094/PDIS-05-19-0991-PDN

Other Activities

 

  1. Abstracts and Papers at International Professional Meetings

 

 

 

  1. Abstracts and Papers at National Professional Meetings

 

Hua, G.K.H., and Dung, J.K.S. 2020. Use of Alliums as trap crops to reduce white rot inoculum in infested field soil. American Phytopathological Society Plant Health 2020 Meeting. ePoster presentation. August 10-14, 2020. Online meeting.

Iglesias, L., and B. A. Nault. 2019. Host-plant resistance and plastic mulches: Potential for managing onion thrips (Thrips tabaci) in organic onion production. Entomological Society of America Annual Meeting, St. Louis, MO, November 20, 2019.

Mandal, S. and C.S. Cramer. 2020. Advancement in breeding for Fusarium basal rot resistance of onion. HortScience 55: S22 (Abstr).

Nault, B. A., R. Harding, L. Iglesias, E. Grundberg, T. Rusinek, T. Elkner, B. Lingbeek and S. Fleischer. 2019. Management of Allium leafminer (Phytomyza gymnostoma): A new invasive pest of Allium crops in North America. Entomological Society of America Annual Meeting, St. Louis, MO, November 17, 2019.

Leach, A. B., S. Reiners and B. A. Nault. 2019. Integrating pest management for onion thrips and bacterial bulb rot in onion production. Entomological Society of America Annual Meeting, St. Louis, MO, November 20, 2019.

Moretti, E., and B. A. Nault. 2019. Influence of abiotic factors on onion maggot adult population dynamics and larval damage in commercial onion fields. Entomological Society of America Annual Meeting, St. Louis, MO, November 18, 2019.

Leach, A. B., F. Hay, R. Harding and B. A. Nault. 2019. Role of onion thrips in the development of Stemphylium leaf blight in onion. Entomological Society of America Annual Meeting, St. Louis, MO, November 20, 2019.

Regan, K., and B. A. Nault. 2019. Evaluating fertilizer rates and insecticide application frequency for management of onion thrips (Thrips tabaci) on onion. Entomological Society of America Annual Meeting, St. Louis, MO, November 17, 2019.

  1. Reports at Grower Meetings and Field Days

Drost, D. and Nischwitz, C. Onion water Use; Onion Weed Control; National “Stop the Rot” project; Onion Stand Variability; Onion Leaf Miners and other Disease Issues; and Utah Legislative Update about Agriculture.  Winter Educational Meetings: February 11, 2020. Brigham City, UT. 50 attendee’s.

Dung, J.K.S. 2020. Epidemiology and IPM of white rot in Allium crops. Invited speaker. Brown Bag Seminar. Webinar presentation. August 21, 2020. Online.

du Toit, L.J. 2020. Onion bacterial diseases: Knowledge gaps and a federal grant to ‘Stop the Rot’. Invited presentation, 2020 Grower Education Conference & Industry Show, Wisconsin Potato & Vegetable Growers’ Association & University of Wisconsin Division of Extension, 4-6 Feb. 2020, Stevens Point, WI. Zoom videoconference (~20 people)

du Toit, L.J. 2020. Onion fungal and bacterial bulb rots, and efficacious use of fungicides for disease control in onion production. Invited presentation, AgriNorthWest farm managers, 5 Feb. 2020, Kennewick, WA (50 people)

du Toit, L.J. 2020. Effective identification and management of diseases impacting vegetable crops. Invited presentation, Columbia Basin Crop Consultants’ Association Short Course, 29-30 Jan. 2020, Moses Lake, WA. (~100 people)

du Toit, L.J. 2019. Bacterial rots of onion: USDA SCRI project update and knowledge gaps. Pacific Northwest Vegetable Assoc. Annual Convention & Trade Show, 20-21 Nov. 2019, Kennewick, WA. (200 people)

du Toit, L.J. 2019. Effective identification and treatment of diseases impacting onion. Pacific Northwest Vegetable Assoc. Annual Convention & Trade Show, 20-21 Nov. 2019, Kennewick, WA. (200 people)

du Toit, L.J. 2019. Keeping our seed pathogen-free. Webinar presented at BC Seed Gathering 2019, Kwantlen Polytechnic University, 9 Nov. 2019, Richmond, BC. YouTube recording https://www.youtube.com/watch?v=DNub-iJXbHo&t=1s (20 people in person + online attendance)

Dutta, B., and Gitaitis, R. 2020. Bacterial Diseases of onion in Georgia. University of Georgia Cooperative Extension Bulletin B1534.

Dutta, B., and Tyson, C. 2021. Evaluation of harvesting methods on post-harvest incidence of center rot and sour skin in onion, Georgia 2020. PDMR 15:V025.

Dutta, B., and Tyson, C. 2021. Evaluation of digging methods on post-harvest incidence of center rot and sour skin in onion, Georgia 2020. PDMR 15:V026.

Dutta, B., Tyson, C., Edenfield, J., Williams, Z., Tanner, S., Shirley, A., Reeves, B., and Powell, S. 2021. Evaluation of onion growth stage directed chemical applications and thrips management program on center rot incidence in onion bulbs in Georgia, 2020. PDMR 15:V023.

Dutta, B., Foster, M. J. and Donahoo, W.M. 2021. Evaluation of fungicides to manage Botrytis leaf blight in Georgia, 2020. PDMR 14:V024.

Dutta, B., Foster, M. J. and Donahoo, W.M. 2020. Evaluation of fungicides to manage Botrytis leaf blight in onion in Georgia, 2019. PDMR 14:V129.

Dutta, B., Tyson, C., Edenfield, J., Williams, Z., Tanner, S., Shirley, A., Reeves, B., and Powell, S. 2020. Evaluation of onion growth stage directed chemical applications and thrips management program on center rot incidence in onion bulbs in Georgia, 2019. PDMR 14:V091.

Gugino, B.K. Integrated disease management with emphasis on cucurbits, tomatoes, and onions. Beginning Vegetable Growers Meeting Series, Lewisburg, PA. 29 February 2020.

Gugino, B.K. Vegetable (bacterial) disease update. Pennsylvania Department of Agriculture Inspector Training. Webinar. 27 April 2020.

Hay, F.S. 2020. Current status of Stemphylium leaf blight fungicide resistance in onion in New York. Empire State Producers EXPO. Cornell Coop. Extension. Syracuse, NY. January 15, 2020.  Attendees: 43.

Hoepting, C.A.  2020.  Botrytis leaf blight in onion featuring 2020 on-farm trial results and onion scouting summaries.  Potato and Onion Twilight Meeting, Cornell Vegetable Program, Marion, NY: September 3, 2020.  Attendees: 25.

Hoepting, C.A.  2020.  Sneak peak at results from 2020 on-farm onion thrips research trials.  Potato and Onion Twilight Meeting, Cornell Vegetable Program, Marion, NY: Sep 3, 2020.  Attendees: 25.

Hoepting, C.A. and E.R. van der Heide.  2020. Big fat onion variety nitrogen rot project. Muck Donut Hour, Elba, NY: August 18, 2020. Attendees: 9.

Hoepting, C.A. 2020.  First look at 2020 results from onion thrips “hammer” trial.  Muck Donut Hour, Elba, NY: August 11, 2020. Attendees: 8

Hoepting, C.A. and S.K. Vande Brake.  2020. Onion fungicide use summaries across major muck-onion growing regions in New York.  Muck Donut Hour, Elba. NY: July 28, 2020. Attendees: 10.

Hoepting, C.A. 2020. New onion fungicide recommendations for onion.  Muck Donut Hour, Elba, NY: June 23, 2020.  Attendees: 10.

Hoepting, C.A. 2020. New onion fungicide recommendations for onion.  Wayne County Onion Grower Meeting, Newark, NY: June 25, 2020. Attendees: 6.

Hoepting, C.A. 2020. New onion fungicide recommendations for onion.  Orange County Onion Grower Meeting, Fulton, NY: June 25, 2020. Attendees: 8.

Hoepting, C.A.  2020.  Mancozeb for early BLB control in onion.  Muck Donut Hour, Elba, NY: June 2, 2020.  Attendees: 6.

Hoepting, C.A.  2020.  Results from 2019 onion fungicide trials for Stemphylium leaf blight.  Orange County Onion School, Pine Island, NY: March 6, 2020.  Attendees: 50.

Hoepting, C.A. 2020. 2020 Vision: New fungicide recommendations for Stemphylium leaf blight in onion.  Empire State Producers Expo, SLB Onion Fungicide Resistance Workshop.  Cornell Cooperative Extension.  Syracuse, NY.  January 15, 2020. Attendees: 43.

Hoepting, C.A. 2020. The Ever-changing field performance of fungicides for control of  Stemphylium leaf blight in onion.  Empire State Producers Expo, SLB Onion Fungicide Resistance Workshop.  Cornell Cooperative Extension.  Syracuse, NY.  January 15, 2020. Attendees: 43.

Hoepting, C.A.  2020.  Onion disease management: Stemphylium, downy mildew and Botrytis.  2020 Ontario County Produce Auction Meeting, Stanley, NY: January 8, 2020. Attendees: 103.

Hua, G.K.H., and Dung, J.K.S. 2020. White Rot Research: USDA National Institute of Food and Agriculture Grant. Invited speakers. California Garlic and Onion Research Advisory Board Allium Research Symposium. Oral presentation February 10, 2020. Tulare, CA. (~100 attendees)

Moretti, E., and B.A. Nault. 2020. Influence of environmental factors on onion maggot larval damage in commercial onion fields. Cornell Cooperative Extension. Syracuse, NY. January 15, 2020. Attendees: 50.

Nault, B.A., L. Iglesias, and F. Hay. 2020. Vegetable: Update on organic onion pest and disease management. Northeast Farming Organization of New York Winter Conference Workshop. January 27, 2020. Attendees: 30.

Nault, B.A. and K. Regan. 2020. Onion thrips research round-up for 2019. Empire State Producers EXPO. Cornell Cooperative Extension. Syracuse, NY. January 15, 2020. Attendees: 43.

Nault, B.A. 2020. Flies in the ointment: Update on onion maggot and allium leafminer management. Cornell Cooperative Extension. Syracuse, NY. January 15, 2020. Attendees: 50.

Putman, A.I Evaluation of weather-based models for management of onion downy mildew. California Garlic and Onion Symposium, UC Cooperative Extension, February 10 2020, Tulare, CA.

Reitz, S. 2019. Thrips and IYSV Management in the Treasure Valley. Pacific Northwest Vegetable Association Annual Meeting.

Reitz, S. 2020. Thrips/IYSV Management. Idaho-Malheur County Onion Growers Associations Annual Meeting

Reitz, S.  2020. Onion Variety Day – Self Guided Tour. Malheur Experiment Station, August 2020

Thornton, M. and K. Beck. Pink root – drip applied fungicides and remote sensing. Idaho – Malheur County Onion Growers Association Annual Meeting. Ontario, OR, February 4, 2020.

Thornton, M. Herbicide and growth regulator effects on single centers. Idaho – Malheur County Onion Growers Association Annual Meeting. Ontario, OR, February 4, 2020.

Thornton, M. Management of pink root in onions. Idaho Association of Plant Protection, (Virtual), November 4, 2020.

Thornton, M. Opportunities for insect and disease management in drip irrigated onion production. Far West Agribusiness Association Conference, Virtual, December 17, 2020.

Waters, T.D., and Reitz, S. 2019. Avoiding further resistance development and insecticide efficacy for onion thrips. Pacific Northwest Vegetable Association, Kennewick, WA. Invited. (200 people)

Waters, T.D. 2019. Seedcorn maggot biology and control in organic production systems. Pacific Northwest Vegetable Association, Kennewick, WA. Invited. (200 people)

Woodhall, J. Stemphylium Leaf Blight Identification and Control Strategies. Pacific Northwest Vegetable Association Meeting.

 

  1. Newsletter Articles

Drost, D and Nischwitz, C. Details of February 2020 Utah Onion Association meetings published in Onion World. Available online at https://issuu.com/columbiamediagroup/docs/onion_world_may-june_2020

Gugino, B.K. Pennsylvania Vegetable and Berry Production: Current issues for July 14, 2020. Pennsylvania Vegetable Disease Update. https://extension.psu.edu/pennsylvania-vegetable-and-berry-current-issues-for-july-14-2020

Gugino, B.K. Pennsylvania vegetable disease update for June 17, 2020. Pennsylvania Vegetable Disease Update. https://extension.psu.edu/pennsylvania-vegetable-disease-update-for-june-17-2020

Gugino, B.K. Pennsylvania Vegetable and Berry Production: Current issues for June 16, 2020. https://extension.psu.edu/pennsylvania-vegetable-and-berry-production-current-issues-for-june-16-2020

Putman, A.I. 2020. Vegetable disease update: disease activity continues. Imperial County Agricultural Briefs 23(3): 33-35.

Putman, A.I. 2020. Vegetable disease update: winter starts wet then turns dry. Imperial County Agricultural Briefs 23(2): 21-22.

Reitz, S.R. 2020. Onion Variety Day – Self Guided Tour. Malheur Experiment Station, August 2020

Walsh, O.S., Thornton, M.,  Marshall, J.M.,  Morishita, D., Felix, J. and Hatzenbuehler, P.L. 2020. Adjusting cropping systems affected by COVID-19. IPC Potato Pulse. April 24 issue.

WSU Onion Alerts. https://mailchi.mp/wsu/wsu-onion-alert-aug-14-1303793?e=72ba613792: Time-sensitive onion disease, pest, and production topics covered in regular articles between May and August of 2020.

 

  1. Annual Reports

Beck, K., M. Thornton, R. Portenier, O. Morgan, J. Ryu and J. Neufeld. 2020. Evaluating the use of hyperspectral remote sensing and spectral vegetation indices to diagnose onion pink root. Proc. of the Idaho/Malheur County Onion Growers Meeting. 11pp

Feibert, E. B. G., Reitz, S., Rivera, A., Wieland, K. D. (2020). 2019 Onion Variety Trials (pp. 21-49). Oregon State University Malheur Experiment Station Annual Report 2019, Department of Crop and Soil Science Ext/CrS 163. https://Agsci.oregonstate.edu/mes/station-complete-annual-reports/2019-annual-report 

Reitz, S., Trenkel, I., Feibert, E. B. G., Wieland, K. D., Rivera, A. (2020). Evaluation of Mastercop® for Disease Management—2019 (pp. 89-91). Oregon State University Malheur Experiment Station Annual Report 2019, Department of Crop and Soil Science Ext/CrS 163. https://Agsci.oregonstate.edu/mes/station-complete-annual-reports/2019-annual-report 

Reitz, S. (2020). Monitoring Onion Pests across the Treasure Valley—2019 (pp. 92-96). Oregon State University Malheur Experiment Station Annual Report 2019, Department of Crop and Soil Science Ext/CrS 163. https://Agsci.oregonstate.edu/mes/station-complete-annual-reports/2019-annual-report 

Reitz, S., Trenkel, I., Feibert, E. B. G., Wieland, K. D., Rivera, A. (2020). Thrips and Iris Yellow Spot Virus Management in the Treasure Valley—2019 (pp. 97-120). Oregon State University Malheur Experiment Station Annual Report 2019, Department of Crop and Soil Science Ext/CrS 163. https://Agsci.oregonstate.edu/mes/station-complete-annual-reports/2019-annual-report

Thornton, M., R. Portenier, O. Adams, and B. Simerly. 2020. Long term storage of onion cultivars. Proc. of the Idaho/Malheur County Onion Growers Meeting. 4pp.

Thornton, M., J. Woodhall and R. Portenier. 2020. Pink root control in onions with drip-applied fungicides. Proc. of the Idaho/Malheur County Onion Growers Meeting. 9pp.

Thornton, M., R. Portenier, and O. Morgan. 2020. Evaluation of herbicides for impact on the incidence of single centers in onions. Proc. of the Idaho/Malheur County Onion Growers Meeting. 6pp.

  1. Internet Resources

du Toit, L.J. https://www.youtube.com/watch?v=FpmGHBUezVc&feature=youtu.be  (English) and https://www.youtube.com/watch?v=13k5H6oTzds&feature=youtu.be  (Spanish) videos on basic identification of onion bacterial bulb rots compared to other causes of onion bulb rots or abiotic problems. Video available in English and Spanish.

Hoepting, C.A.  2020.  Cornell Cheat Sheet: Seed treatments and in-furrow drenches for muck-grown direct seeded onion.  Cornell Cooperative Extension Cornell Vegetable Program website. online: https://rvpadmin.cce.cornell.edu/uploads/doc_937.pdf

Hoepting, C.A. 2020.  2020 fungicide status for control of Stemphylium leaf blight in onion. Cornell Cooperative Extension Cornell Vegetable Program website. online: https://rvpadmin.cce.cornell.edu/uploads/doc_888.pdf

Hoepting, C.A. and S.K. Vande Brake. 2020. Cómo diagnosticar la podrición bacteriana de bulbos de cebolla. VIDEO.  Cornell Cooperative Extension Cornell Vegetable Program website. online: https://www.youtube.com/watch?v=FpmGHBUezVc&list=PLMxaHBxUI9qbChbojOUBlozWK2ypCo50p&index=2&t=17s

Hoepting, C.A. and S.K. Vande Brake. 2020. How to diagnose onion bacterial bulb rot.  VIDEO.  Cornell Cooperative Extension Cornell Vegetable Program website. online:

https://www.youtube.com/watch?v=13k5H6oTzds&list=PLMxaHBxUI9qbChbojOUBlozWK2ypCo50p&index=3

Nault, B.A., and C.A. Hoepting. 2020. Guidelines for 2020 Management of Onion Thrips in Onion.  Cornell Cooperative Extension Cornell Vegetable Program website. online: https://cvp.cce.cornell.edu/submission.php?id=587&crumb=crops|crops|onions|crop*20

Pacific Northwest Vegetable Extension Group (PNW VEG) website (http://mtvernon.wsu.edu/path_team/vegpath_team.htm), a tri-state Extension team with resources on diverse vegetables grown in the PNW USA. Sections on onions include the Photo Gallery (http://mtvernon.wsu.edu/path_team/onion.htm) and IPM Resources (http://mtvernon.wsu.edu/path_team/ipmResources.htm#onion).

https://Alliumnet.com/projects/stop-the-rot/ website added and updated regularly to include outline and progress on the USDA NIFA SCRI 'Stop the Rot' onion bacterial disease project.

Reitz, S.2020.  https://Agsci.oregonstate.edu/mes/malheur-experiment-station

04/25/2022

Agarwal, G.,  Gitaitis, R.D., and Dutta, B. 2021. Pan-genome of novel Pantoea stewartii subsp. indologenes reveals genes involved in onion pathogenicity and evidence of lateral gene transfer. Microorganisms 9: 1761. https://doi.org/10.3390/ microorganisms9081761

 

Agarwal, G., Choudhary, D., Stice, S.P., Myers, B.K., Gitaitis, R.D., Venter, S.N., Kvitko, B.H., and Dutta, B. 2021. Pan-genome-wide analysis of Pantoea ananatis identified genes linked to pathogenicity in onion. Frontiers in Microbiology https://doi.org/10.3389/fmicb.2021.684756.

 

Beck, K. D., Reyes-Corral, C., Rodriguez-Rodriguez, M., May, C., Barnett, R., Thornton, M.K., Bates, A. A., Woodhall, J. W., B. K. Schroeder. 2021. First report of Fusarium proliferatum causing necrotic leaf lesions and bulb rot on storage onion (Allium cepa) in Southern Idaho. Plant Disease: 2021. https://doi.org/10.1094/PDIS-06-20-1399-PDN.

 

Brown, L., Harrington, S., Harrington, M., Murdock, M. R., Pizolotto C. A., and J. W. Woodhall. 2021. Rhizoctonia solani AG 2-2 IIIB Causing Root Rot of Onion in Idaho. Plant Disease 105:2, 498-498

 

Cramer, C.S., S. Mandal, S. Sharma, S. Shahabeddin Nourbakhsh, I. Goldman, and I. Guzman. 2021. Recent advances in onion genetic improvement. Agronomy 11:482. https://doi.og/10.3390/agronomy110300482.

 

Greenway, G., N. Kamal, S. Shahabeddin Nourbakhsh, and C.S. Cramer. 2021. Estimating potential changes in costs and returns from use of a partially onion thrips-resistant cultivar and action-based spray thresholds in Idaho and Eastern Oregon. Southwestern Entomologist. 46:349-356. https://doi.og/10.3958/059.046.0206.

 

Kamal, Harding, R.S., and B.A. Nault. 2021. Onion Thrips control in onion, 2020. Arthropod Management Tests 46(1): tsab022, https://doi.org/10.1093/amt/tsab022.

 

Hay, F.S., S. Stricker, B.D. Gossen, M.R. McDonald, D.W. Heck, C.A. Hoepting, S. Sharma, and S.J. and Pethybridge. 2022. Stemphylium leaf blight of onion: A re-emerging threat to onion production in eastern North America. Plant Dis. PDIS-05-21-0903-FE. On Just Published. 8 December 2021. https://doi.org/10.1094/PDIS-05-21-0903-FE.

 

Hay, F.S., D.W. Heck, S. Sharma, A. Klein, C. Hoepting, and S.J. Pethybridge. 2021. Stemphylium leaf blight of onion. Disease Lesson. The Plant Health Instructor R2 submitted 8 October 2021. In Press.

 

Hay, F.S., D.W. Heck, A. Klein, S. Sharma, C.A. Hoepting, and S.J. Pethybridge. 2021. Spatiotemporal attributes of Stemphylium leaf blight epidemics and effects of residue management in New York onion fields. Plant Dis. PDIS-07-21-1587-RE. On First Look. 19 November 2021. https://doi.org/10.1094/PDIS-07-21-1587-RE.

 

Hay, F.S., and S.J. Pethybridge. 2021. Stemphylium leaf blight of onion. Allium Chapter in World Handbook of Vegetables. In Press.

 

Hoepting, C.A. 2021. Running out of fungicide options for control of Stemphylium leaf blight in onion. Veg Edge, 17(18): 4-5.

 

Hoepting, C.A. 2021. Onion downy mildew prevention the ‘crutch’ for ‘limping’ SLB fungicides to manage DM-SLB complex. Veg Edge, 17(14): 8-9.

 

Hoepting, C.A. and Hay, F.S. 2021. Part II: Onion fungicide research updates and new recommendations for control of Botrytis and Stemphylium leaf blights, 2021. Veg Edge, 17(13): 8-9.

 

Hoepting, C.A. and Hay, F. S. 2021. Part I: Onion fungicide research updates and new recommendations for control of Botrytis and Stemphylium leaf blights, 2021. Veg Edge, 17(12): 8-10.

 

Iglesias, L.E., R.L. Groves, B. Bradford, R.S. Harding, and B.A. Nault. 2021. Evaluating combinations of bioinsecticides and adjuvants for managing Thrips tabaci (Thysanoptera: Thripidae) in onion production systems. Crop Protection 142 https://doi. org/10.1016/j.cropro.2020.105527.

 

Iglesias, L.E., M.J. Havey, and B.A. Nault. 2021. Potential for managing onion thrips (Thrips tabaci) in organic onion production systems using multiple IPM tactics. Insects (in press).

 

Moretti, E.A., A.G. Taylor, K. Wickings, B.A. Nault. 2021. Insights into how spinosad seed treatment protects onion from onion maggot (Diptera: Anthomyiidae). J. Econ. Entomol. doi: 10.1093/jee/toaa332.

 

Moretti, E.A., K. Wickings, and B.A. Nault. 2021. Environmental factors and crop management that affect Delia antiqua damage in onion fields. Agric. Ecosyst. Environ. 314:  107420.

 

Nault, B.A., R.K. Sandhi, R.S. Harding, E. Grundberg, and T. Rusinek. 2022. Optimizing spinosyn insecticide applications for allium leafminer (Diptera:  Agromyzidae) management in allium crops. J. Econ. Entomol. https://doi.org/10.1093/jee/toac016.

 

Regan, K. and B. Nault. 2021. Less is more: Reducing inputs benefits onion production in muck soil. Onion World  37(4): 8-10.

 

  1. S. Shahabeddin Nourbakhsh, and C.S. Cramer. 2021. Reduced Iris yellow spot symptoms through selection within onion breeding lines. Horticulturae 7:12. https://doi.og/10.3390/horticulturae7060012.

 

Koirala, S., Zhao, M., Agarwal, G., Stice, S., Gitaitis, R.., Kvitko, B., and Dutta, B. 2021. Identification of two novel pathovars of Pantoea stewartii subsp. indologenes affecting Allium sp. and millets. Phytopathology 111:1509-1519.

 

Mandal, S. and C.S. Cramer. 2021. Comparing visual and image analysis techniques to quantify Fusarium basal rot severity in mature onion bulbs. Horticulturae 7:156. https://doi.og/10.3390/horticulturae7060156.

 

Mandal, S. and C.S. Cramer. 2021. Improving Fusarium basal rot resistance of onion cultivars through artificial inoculation and selection of mature bulbs. Horticulturae 7:168. https://doi.og/10.3390/horticulturae7060168.

 

Mandal, S. and C.S. Cramer. 2021. Screening of USDA onion germplasm for Fusarium basal rot resistance. Horticulturae 7:174. https://doi.og/10.3390/horticulturae7060174.

 

Shin, G.Y., Smith, A., Coutinho, T.A., Dutta, B., Kvitko, B. 2022. Validation of species-specific PCR assays for the detection of Pantoea ananatisP. agglomeransP. allii and P. stewartiiPlant Disease (first look).

 

Stice, S., Shin, G.Y., Armas, S.D., Koirala, S., Galvan, G.A., Siri, M.I., Severns, P.M., Coutinho, T.A., Dutta, B., and Kvitko, B. 2021. The distribution of onion virulence gene clusters among Pantoea spp. Frontiers in Plant Science https://doi.org/10.3389/fmicb.2021.00184.

 

Stice, S., Thao, K.K., Khang, C.K., Baltrus, D.A., Dutta, B., and Kvitko, B.H. 2020. Thiosulfinate tolerance is virulence strategy for an atypical bacterial pathogen of onion. Current Biology 30: 1-11. 

 

Stumpf, S., Leach, L., Srinivasan, R., Coolong, T., Gitaitis, R., and Dutta, B. 2021. Foliar chemical protection against Pantoea ananatis in onion is negated by Thrips feeding.  Phytopathology 111: 258267. 

https://apsjournals.apsnet.org/doi/10.1094/PHYTO-05-20-0163-R

 

Tabassum, A., S.V. Ramesh, Y. Zhai, R. Iftikhar, C. Olaya, and H.R. Pappu (2021). Viruses without Borders: Global analysis of the population structure, haplotype distribution, and evolutionary pattern of Iris yellow spot virus (Family Tospoviridae, Genus Orthotospovirus). Frontiers in Microbiology. https://doi.org/10.3389/fmicb.2021.633710

 

Woodhall, J. W., Harrington, M., Keith, S. Oropeza, A., Thornton, M. and B. K. Schroeder. 2020. First report of root rot caused by Pythium myriotylum of onion in Idaho.  Plant Disease 104:9, 2529, https://doi.org/10.1094/PDIS-05-19-0991-PDN

 

Woodhall, J. W., Harrington, M., Brown, L., Jensen, J. and K. Painter. 2022. Development of a Real-Time Loop-Mediated Isothermal Amplification Assay for Stromatinia cepivora in Response to an Outbreak in Northern Idaho. Plant Health Progress 23:1, 24-27.

 

Yannuzzi, I. M., E.A. Moretti and B.A. Nault. 2021. Comparison of bioassays used to determine onion thrips (Thysanoptera: Thripidae) susceptibility to spinetoram. J. Econ. Entomol. 114(5): 2236-2240.

 

Zhao, M., Kvitko, B.H., Gitaitis, R.D., and Dutta, B. 2021. Bacterial streak and bulb rot of onion. Plant Health Instructor  DOI: 10.1094/PHI-Eā€‹ā€‹-2021-0421-01ā€‹.

 

Zhao, M., Tyson, C., Chen, H.C., Paudel, S., Gitaitis, R., Kvitko, B., and Dutta. B. 2021. Pseudomonas allivorans sp. nov., a plant-pathogenic bacterium isolated from onion leaf in Georgia, USA. Systematic and Applied Microbiology 45 (1):126278. doi: 10.1016/j.syapm.2021.12627

 

Plant Disease Management Reports:

 

Belo, T., du Toit, L., Waters, T., Derie, M., and LaHue, G. 2021.  Effects of irrigation frequency and final irrigation timing on onion bacterial diseases in the Columbia Basin of Washington, 2020. PDMR 15:V109 https://doi.org/10.1094/PDMR15

 

du Toit, L.J., Derie, M.L., Gundersen, B., Waters, T.D., and Darner, J. 2021. Efficacy of bactericides for management of bacterial leaf blight and bulb rots in an onion crop in Pasco, WA, 2020. PDMR 15:V107.  https://doi.org/10.1094/PDMR15

 

du Toit, L.J., Derie, M. L., and Gundersen, B. 2021. Efficacy of disinfectants applied to onion bulbs in storage for control of bacterial bulb rots, Pasco, WA, 2020-2021. PDMR 15:V102. https://doi.org/10.1094/PDMR15

 

du Toit, L.J., Derie, M. L., and Gundersen, B. 2021. Efficacy of late-season cultural practices on bacterial leaf blight and bulb rots in an onion bulb crop in Pasco, WA, 2020. PDMR 15:V100. https://doi.org/10.1094/PDMR15

 

du Toit, L.J., M. L. Derie, B. Gundersen. 2021. Efficacy of disinfectants applied to onion bulbs in storage for control of bacterial bulb rots, Pasco, WA, 2020-2021. PDMR 15.V102.

 

Dutta, B., and Tyson, C. 2021. Evaluation of harvesting methods on post-harvest incidence of center rot and sour skin in onion, Georgia 2020. PDMR 15:V025.

 

Dutta, B., and Tyson, C. 2021. Evaluation of digging methods on post-harvest incidence of center rot and sour skin in onion, Georgia 2020. PDMR 15:V026.

 

Dutta, B. 2021. Evaluation of individual fungicides for downy mildew control in cucumber in Tift County, Georgia, 2020. PDMR 15:V021.

 

Dutta, B., Tyson, C., Edenfield, J., Williams, Z., Tanner, S., Shirley, A., Reeves, B., and Powell, S. 2021. Evaluation of onion growth stage directed chemical applications and thrips management program on center rot incidence in onion bulbs in Georgia, 2020. PDMR 15:V023.

 

Dutta, B., Foster, M. J. and Donahoo, W.M. 2021. Evaluation of fungicides to manage Botrytis leaf blight in Georgia, 2020. PDMR 14:V024.

 

Dutta, B., and Foster, M. J. 2021. Evaluation of bactericides and plant defense inducers to manage center rot of onion in Georgia, 2020. PDMR 15:V027.

 

Dutta, B., Foster, M. J. and Donahoo, W.M. 2020. Evaluation of fungicides to manage Botrytis leaf blight in onion in Georgia, 2019. PDMR 14:V129.

 

Hoepting, C.A., Caldwell, S.K., and van der Heide, E.V. 2021. Efficacy of fungicide treatments for control of Botrytis Leaf Blight and Stemphylium leaf blight in onion, Elba, 2020. Plant Disease Management Reports 15: V162.

 

Hoepting, C.A., Caldwell, S.K., and van der Heide, E.V. 2021. Effect of fungicide application timing on control of Botrytis leaf blight and Stemphylium leaf blight in onion, 2020. Plant Disease Management Reports 15: V163.

 

Hoepting, C.A., Caldwell, S.K., and van der Heide, E.V. 2021. Efficacy of fungicide treatments for control of Botrytis Leaf Blight and Stemphylium leaf blight in onion, Oswego, 2020. Plant Disease Management Reports 15: V123.

 

Hoepting, C.A., Caldwell, S.K., and van der Heide, E.V. 2021. Efficacy of fungicide treatments for control of Stemphylium leaf blight in onion, Elba, 2020. Plant Disease Management Reports 15: V155.

 

Hoepting, C.A., Caldwell, S.K., and van der Heide, E.V. 2021. Efficacy of fungicide combinations for control of Stemphylium leaf blight in onion, Elba, 2020. Plant Disease Management Reports 15: V156.

 

Hua, K., and Dung, J.K.S.. 2021. Comparison of fungicides for control of white rot on garlic in Oregon, 2019-2020. PDMR 15:V032.

 

Other Activities

  1. Abstracts and Papers at International Professional Meetings

 

Belo, T., du Toit, L., Waters, T., Derie, M., Schacht, B., & LaHue, G. (2021, 7-10 November). Combating Onion Bacterial Diseases Through Nitrogen Fertility Management [Poster Presentation]. 2021 ASA, CSSA, SSSA International Annual Meeting, Salt Lake City, UT.

 

MacKay et al. 2021. Combating onion bacterial diseases with pathogenomics tools and enhanced management strategies: Research objectives and preliminary results. Research on Demand presentation for American Phytopathological Society’s annual meeting, Plant Health 2021 Online, 2-6 August 2021.

 

  1. Abstracts and Papers at National Professional Meetings

 

Heck, D.W., F.S. Hay, A. Klein, C. Sharma, C. Hoepting, and S.J. Pethybridge. 2021. Spatiotemporal dynamics of Stemphylium leaf blight in New York onion fields. APS NE and Potomac Division Meeting (virtual).

 

Heck, D.W., F.S. Hay, A. Klein, C. Sharma, C. Hoepting, and S.J. Pethybridge. 2021. Spatiotemporal dynamics of Stemphylium leaf blight in New York onion fields. APS Annual Meeting (virtual).

 

Lai, P.-C., L. Iglesias, and B.A. Nault. 2021. Optimizing onion Thrips management programs in organic onion production. Entomological Society of America Annual Meeting, Denver, CO, November 2, 2021.

 

Nault, B. A. 2021. Thrips ecology and management. In PIE Member Symposium: Four decades of adapting, advancing and transforming IPM: Honoring the career of Dr. Anthony Shelton. Entomological Society of America Annual Meeting, November 3, 2021, Denver, CO.

 

Nault, B. A. 2021. Impact of the Lorsban ban in onion in New York. In Symposium: The fate of chlorpyrifos in the US and beyond. Entomological Society of America Pacific Branch Meeting, April 7, 2021. Virtual.

 

Nourbakhsh, S.S. and C.S. Cramer. 2021. Evaluating onion breeding lines for thrips numbers and plant size when grown using water deficient conditions. HortScience 56: S106.

 

Qian, Y.P., Dung, J.K.S., Hua, G.K., and Qian, M. 2021.  Encapsulation of garlic oil and diallyl disulfide with β-cyclodextrin for garlic white rot control. American Chemical Society Spring 2021 Meeting. Poster presentation. April 5-30, 2021. Virtual.

 

Regan, K.H., and B.A. Nault. 2021. Less is more: Evaluating reduced applications of fertilizer and insecticide use for management of onion thrips (Thrips tabaci) on onion. Entomological Society of America Annual Meeting, Denver, CO, November 3, 2021.

 

Regan, K.H., and B.A. Nault. 2021. Less is more for onion management: Reducing inputs pays off in integrated pest management programs for onion thrips (Thrips tabaci). Entomological Society of America Eastern Branch Meeting, Virtual Format. March 2021.

 

  1. Reports at Grower Meetings and Field Days

Chitturi, A., Feibert, E. B. G., Wieland, K. D., Reitz, S. 2021 Management of Onion Thrips with Threshold-Based Insecticide Applications and Reduced Nitrogen Fertility–2020 (pp. 170-181). Oregon State University https://agsci.oregonstate.edu/mes/station-complete-annual-reports/2020-annual-report.

 

Drost, D. 2020. Utah Onion Variety Report. Utah Onion Association meeting, Brigham City, UT

 

Feibert, E. B. G., Reitz, S., Wieland, K. D. 2021. 2020 Onion Variety Trials (pp. 39-61). Oregon State University https://agsci.oregonstate.edu/mes/station-complete-annual-reports/2020-annual-report.

 

Gugino, B.K. Vegetable pathology program update (included onion bacterial disease projects). Lehigh Valley Vegetable Meeting (webinar). 25 May 2021.

 

Gugino, B.K. Vegetable field walk (covered onion diseases). Juniata County Vegetable Twilight Meeting. Richfield, PA. 27 July 2021.

 

Gugino, B.K. Identification and management of common foliar and bulb diseases of onion. Keystone Family Farms Onion Meeting. Madisonburg, PA. 24 January 2022.

 

Gugino, B.K. Identification and management of common foliar and bulb diseases of onion. 2022 Mid-Atlantic Fruit and Vegetable Convention. Hershey, PA. 1 February 2022.

 

Hay, F., Heck, D., Hoepting, C., Klein, A., Pethybridge S.J. 2021. Stemphylium leaf blight – Current status of fungicide insensitivity.  Update for W3008 Multistate Project Annual Meeting, February 3, 2021 (by Zoom).

 

Hoepting, C.A.  2021.  Tour of on-farm Oswego onion fungicide trial, Oswego, NY: August 27, 2021 (11 participants).

 

Hoepting, C.A.  2021.  Tour of on-farm Elba onion fungicide trials, Elba, NY: August 24, 2021 (9 participants).

 

Hoepting, C.A.  2021. New onion fungicide recommendations for 2021.  Annual Oswego County Onion Growers Twilight Meeting, Oswego, NY: June 24, 2021 (51 participants).

 

Hoepting, C.A.  2021. New onion fungicide recommendations for 2021.  Elba Muck Donut Hour, Elba, NY: June 22, 2021 (8 participants).

 

Hua, K., and Dung, J. 2021. Comparison of Fungicides for Control of White Rot on Garlic in Oregon, 2019-2020. Central Oregon Agricultural Research and Extension Center 2020 Annual Report:17-18. https://agsci.oregonstate.edu/sites/agscid7/files/assets/coarec_annual_report_2020_updated.pdf

 

Hua, K. and Dung, J. 2021. Use of Alliums as Trap Crops to Reduce White Rot Inoculum in Infested Soils. Central Oregon Agricultural Research and Extension Center 2020 Annual Report:19-20. https://agsci.oregonstate.edu/sites/agscid7/files/assets/coarec_annual_report_2020_updated.pdf

 

Nault, B.A. 2021. Onion Thrips update and maggot control in a world without Lorsban. Great Lakes Fruit, Vegetable and Farm Market EXPO. Grand Rapids, MI. December 8, 2021. Virtual Speaker, 45 min.

 

Nault, B.A. 2021. Onion maggot management in the Great Lakes region. Agriculture and Agri-Food Canada’s Pesticide Reduced Risk Webinar for Root Pests of Carrot and Onion. (Ontario, Canada). Virtual. November 30, 2021. Speaker, 25 min.

 

Nault, B.A. 2021. Update on management tactics for onion insect pests in New York. Sixty-ninth Annual Muck Vegetable Growers Conference (Ontario, Canada). Virtual. April 1, 2021. Speaker, 25 min.

 

Nault, B.A. 2021. New York vegetable entomology update. Syngenta’s North-Atlantic Innovation 2021 Meeting, March 16, 2021. Virtual. Speaker, 15 min.

 

Nault, B.A. 2021. Seedcorn maggot biology and management in vegetable crops with an emphasis on seed treatments. Oregon Processed Vegetable Commission Annual Grower Meeting. Virtual. January 25, 2021. Speaker, 40 min.

 

Nault, B.A. 2021. Past, current and future management of onion maggot using seed treatments. New York State Report for the W-4168 Multistate Annual Meeting, October 15, 2021. Geneva, NY. Speaker, 20 minutes.

 

Nischwitz, C. 2021. Stop the Rot: Update on Utah’s Survey and Field Trials. Utah Onion Association meeting, Brigham City, UT

 

Nischwitz, C. 2021. Utah’s Disease Survey and Field Trials. Onion Association Field Day, Ogden, UT

 

Regan, K. and B. Nault. 2021. Less is more: Reducing inputs pays off in muck onion systems. Cornell Cooperative Extension Presentation, Elba Muck Donut Hour, Elba, NY. 10 August 2021. Co-author, 20 minutes.

 

Reitz, S. 2021 Monitoring Onion Pests across the Treasure Valley–2020 (pp. 138-144). Oregon State University https://agsci.oregonstate.edu/mes/station-complete-annual-reports/2020-annual-report.

 

Reitz, S., Feibert, E. B. G., Wieland, K. D. 2021 Effects of Irrigation and Nitrogen Fertility Management on Bulb Rots in Onion–2020 (pp. 158-169). Oregon State University https://agsci.oregonstate.edu/mes/station-complete-annual-reports/2020-annual-report.

 

Reitz, S., Wieland, K. D., Feibert, E. B. G. 2021 Management of Bacterial Bulb Rots in Onion–2020 (pp. 145-152). Oregon State University https://agsci.oregonstate.edu/mes/station-complete-annual-reports/2020-annual-report.

 

Schroeder, B. K. 2021. Bacterial Diseases of Onions. Idaho and Eastern Oregon Crop Protection Meeting. Virtual Feb. 2, 2021. 

 

Schroeder, B. K., Sankaran, S., and Khot, L. FAIMS (Field asymmetric ion mobility spectrometry) Detection of Bulb

Rot Pathogens in Storage. Idaho and Malheur County Onion Growers’ Association 60th Annual Meeting. Feb. 4, 2020. 

 

Thornton, M. 2021. Soil-borne diseases. Idaho and Eastern Oregon Onion Crop Protection Meeting, virtual, February 2, 2021.

 

Thornton, M., N. Olsen, R. Hendricks and L. Woodell. 2021. Pre-harvest bruise factors. AgriNorthwest Agronomy Team Meeting, virtual, February 3, 2021.

 

Thornton, M. 2021. Pink root and single centers in onions. AgriNorthwest Agronomy Team Meeting, virtual, February 3, 2021.

 

Thornton, M., R. Portenier, O. Morgan, K. Beck and B. Simerly.  2021.  Long term storage of onion cultivars.   Proc. of the Idaho/Malheur County Onion Growers Meeting. 4pp.

 

Thornton, M., J. Woodhall, R. Portenier, K. Beck and O. Morgan.  2021.  Pink root control in onions with drip-applied fungicides.   Proc. of the Idaho/Malheur County Onion Growers Meeting. 6pp.

 

Woodhall, J. Onion disease update, featuring bacterial diseases. 2021. Idaho-Malheur Co. Onion Growers Meeting, Nampa. February 1, 2022

 

Woodhall J. Stemphylium leaf blight: a re-emerging disease of onions?  U of I, EPPN departmental seminar. 12th April 2021.

 

Woodhall J. Stop the Rot: Diagnostic and Survey Results. PNW Vegetable Association meeting 2021. 17th November. Kennewick.

 

Woodhall J. Use of Models and Trapping in Pest Management. PNW Vegetable Association meeting 2021. 18th November. Kennewick.

 

Woodhall J. Foliar diseases of onion in the Treasure Valley. Onion Crop Protection Meeting. Virtual. February 2nd 2021

 

  1. Newsletter Articles

Cramer, C.S. and I. Guzman. 2021. Breeding for resistance to Iris yellow spot. Onion World. July/August, pp. 10-13.

Drost, D. 2020. Bouncing Back. Onion World Vol. 36(4):6-7. https://onionworld.net/magazine/

 

Drost, D. 2021. Utah Growers Zoom in on Latest Research. Onion World Vol. 37(4):6-7. https://onionworld.net/magazine/

 

Drost, D. 2021. Utah State Heads to the Shed and On to Outside. Onion World Vol. 37(7):30-31. https://onionworld.net/magazine/

du Toit, L.J., Waters, T., Derie, M., and Darner, J. 2020. Battling onion bacterial diseases with bactericides. Onion World, December 2020:6-11. https://issuu.com/columbiamediagroup/docs/onion_world_december_2020.

du Toit, L., and Waters, T. 2021. To disinfect or not? Can postharvest applications of disinfectants reduce bacterial bulb rots in storage? Onion World, July/August 2021:6-9. Onion World Magazine July/August 2021

Dutta, B., Grey, T., and Schmidt, J. 2022. Neglecting weeds can lead to late-season disease in organic onions. Specialty Crop News. March 2022.

 

Dutta, B., DevKumar, G., Kvitko, B.H., and Naikare, H. 2021. Studying Salmonella contamination in onion. Vegetable and Specialty Crop News, August 2021.

 

Dutta, B. 2021. Onion disease management in Georgia. Vegetable and Specialty Crop News, February 2021.

 

Dutta, B and Gitaitis, R.D. 2020. Disease quiz II. Onion World Magazine. January 2021.

 

Dutta, B and Gitaitis, R.D. 2020. Disease quiz I. Onion World Magazine. July 2020.

 

Gugino, B.K., K. Demchak, and S. Fleischer. 2021 PA Vegetable and Berry Production: Current issues: June 10. Online: https://extension.psu.edu/2021-current-issues-for-pa-vegetable-and-berry-crops-june-10

 

Gugino, B.K. 2021 Pennsylvania Vegetable Disease Update: June 23 Online: https://extension.psu.edu/2021-pennsylvania-vegetable-disease-update-june-23 

 

Gugino, B.K., K. Demchak, and S. Fleischer. 2021 PA Vegetable and Berry Production: Current issues: July 6. Online: https://extension.psu.edu/2021-pa-vegetable-and-berry-current-issues-july-6

 

Gugino, B.K. 2021 Pennsylvania Vegetable Disease Update: July 14 Online: https://extension.psu.edu/2021-pennsylvania-vegetable-disease-update-july-14

 

Hoepting, C.A.  2021.  2021 Cornell Onion (Dry Bulb) Fungicide Cheat Sheet for Control of Leaf Diseases.  Cornell Cooperative Extension Cornell Vegetable Program. Website: https://rvpadmin.cce.cornell.edu/uploads/doc_982.pdf

 

Hoepting, C.A.  2021.  Example Onion Fungicide Spray Program for Control of Leaf Diseases in Onion, 2021.  Cornell Cooperative Extension Cornell Vegetable Program. Website: https://rvpadmin.cce.cornell.edu/uploads/doc_984.pdf

 

Hua, G.H.H. and Dung, J.. 2020. Here Today, Gone Tomorrow: Can Early Terminated Onion Trap Crops Reduce White Rot Infestations? Onion World (November 2020):32-33.

 

Lameiras, M.M. 2020. UGA researchers discover genes that allow bacteria to resist onion’s natural defenses. CAES News and Events, July 2020.

 

Mazzone, J.D. and B.K. Gugino. 2021. What have we learned from two decades of onion cultivar research at Penn State? Online: https://extension.psu.edu/what-have-we-learned-from-two-decades-of-onion-cultivar-research-at-penn-state.

 

Nischwitz, C. 2021. Bacterial Bulb Rot Diseases in Utah. Utah Pests Quarterly. Spring edition. Vol. 15: 11 and 15. (https://extension.usu.edu/pests/files/up-newsletter/2021/UtahPestsNews-spring21.pdf )

 

Robinson, A. 2020. Fungicide Update for Vegetable Crops. Vegetable and Specialty Crop News, March 2020.

 

Thompson, C. 2020. Organic Vidalia Onion Industry: Challenges in sour skin management. Onion World Magazine. December 2020.

 

Thompson, C. 2020. Vidalia onion crop looks ‘favorable’ despite presence of downy mildew disease in localized areas. Vegetable and Specialty Crop  News, April 2020. (edits provided by B. Dutta)

 

Woodhall JW, Murdock M, Beck K, Thornton . Pink root of onion. University of Idaho Extension press. BUL 1000.

  1. Annual Reports

LaHue, G.T., Waters, T., and du Toit, L., 2020. Revisiting nitrogen management recommendations in the context of onion bacterial diseases. Progress report Columbia Basin Onion Research Committee. Submitted 31 October 2020.

  1. Internet Resources

Wohleb, C.H., Waters, T.W., du Toit, L.J., and LaHue, G. 2021. Washington State University Extension Onion Alert, 1 September 2021. https://mailchi.mp/wsu/wsu-onion-alert-sept1-2021-1305808?e=72ba613792 

du Toit, Lindsey, MacKay, Heather, Kilgore, Darrell, and Ziegler, Matthew. Combating bacterial diseases of onion: How do we stop the rot? 14.41 min. Posted Dec. 15, 2020. https://youtu.be/VLpZqCrQuPw

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