02/24/2023

Belo, T., LaHue, G., and du Toit, L.J. 2023. Reducing the risk of onion bacterial diseases through irrigation, fertility, and other cultural management strategies. Agronomy Journal: accepted. doi: 10.1002/agj2.21301.

 

du Toit, L.J., Derie, M.L., Gundersen, B., Waters, T.D., and Darner, J. 2022. Effects of bactericide and herbicide applications on bacterial leaf blight and bulb rot of onion, Pasco, WA, 2021-22. Plant Disease Management Reports 16:V150.

 

du Toit, L.J., Derie, M.L., Gundersen, B., Waters, T.D., and Darner, J. 2022. Effects of late-season cultural practices on bacterial leaf blight and bulb rot in an onion crop, Pasco, WA, 2021-22. Plant Disease Management Reports 16:V149.

 

du Toit, L.J., Derie, M.L., Gundersen, B., Waters, T.D., and Darner, J. 2022. Efficacy of disinfectants applied to onion bulbs in storage for control of bacterial bulb rots, Pasco, WA, 2021-22. Plant Disease Management Reports 16:V148.

 

du Toit, L.J., Derie, M.L., Gundersen, B., Waters, T.D., and Darner, J. 2022. Susceptibility of 12 onion cultivars to bacterial leaf blight and bulb rot in Pasco, WA, 2021-22. Plant Disease Management Reports 16:V151.

 

Dung, J.K.S. and Hua, K.. 2022. Comparison of fungicides for control of white rot on garlic in Oregon, 2020-2021. Plant Disease Management Reports 16:CF029. doi: 10.1094/PDMR16

 

Dutta, B., Foster, M.J., and Donahoo, W.M. 2022. Evaluation of fungicides to manage Botrytis leaf blight on onion in Georgia, 2021. PDMR 16:V043.

 

Dutta, B., Foster, M.J., and Donahoo, W.M. 2022. Evaluation of bactericides and plant defense inducers to manage internal bacterial rot of onion in Georgia, 2021. PDMR 16:V044.

 

Dutta, B., and Tyson, C. 2022. Evaluation of neck-clipping length on post-harvest incidence of external and internal bacterial bulb rot in onion, Georgia, 2021. PDMR 16:V107.

 

Dutta, B., and Tyson, C. 2022. Evaluation of harvesting methods on post-harvest incidence of external and internal bacterial bulb rot in onion, Georgia, 2021. PDMR 16:V108.

 

Dutta, B., and Tyson, C. 2022. Evaluation of digging methods on post-harvest incidence of external and internal bacterial bulb in onion, Georgia, 2021. PDMR 16:V109.

 

Feibert, E., C. Shock, S. Reitz, A. Rivera-Ramires, and K. Wieland. 2022. Performance of Onion Cultivars in the Treasure Valley of Eastern Oregon and Southwestern Idaho in 2010—20. Hortechnology, 32:435-446

 

Hay, F.S. D.W. Heck, A. Klein and S. Sharma, C.A. Hoepting and S.J. Pethybridge.  2022.  Spaciotemporal dynamics of Stemphylium leaf blight and potential inoculum sources in New York onion fields.  Plant Disease, 106(5): 1381-1391.

 

Hay, F.S., D.W. Heck, S. Sharma, A. Klein, C.A. Hoepting and S.J. Pethybridge.  2022.  Stemphylium leaf blight of onion.  The Plant Health Instructor, 22: online: doi: 10.1094/PH-P-2022-01-0001.

 

Hay, F., A. Klein, S. Murphy, S., and B. Nault. 2022. Efficacy of OMRI-listed products for Stemphylium leaf blight control in onion in New York, 2018. Plant Disease Management Reports 16: V121.

 

Hay, F., A. Klein, S. Murphy, and B. Nault. 2022. Effect of OMRI-listed products for Stemphylium leaf blight control in onion in New York, 2019. Plant Disease Management Reports 16: V152.

 

Hoepting, C.A. 2022. Rolling onions to “Stop the Rot” (cover).  Veg Edge, 18(12): 1, 3.

 

Hoepting, C.A. 2022. Bactericides not effective for control of onion bulb rot in on-farm field trials in New York (cover).  Veg Edge, 18(17): 1, 3-4.

 

Hoepting, C.A. 2022. Primary vs. secondary Stemphylium leaf blight in onion.  Veg Edge, 18(16): 5-6.

 

Hoepting, C.A. 2022. Scouting tips for onion thrips in onion.  Veg Edge, 18(13): 9.

 

Hoepting, C.A. and F.S. Hay. 2022. 2021 fungicide research highlights for Stemphylium leaf blight in onion – The fall of the FRAC 3s and keeping onions green despite poor SLB control.  Veg Edge, 18(13): 3-5.

 

Hoepting, C.A. 2022. Slim pickings for fungicides to control Stemphylium leaf blight of onion in 2022.  Veg Edge, 18(12): 4-5.

 

Hoepting, C.A. 2022. Best fungicide options for control of Botrytis leaf blight in onion: It depends on what kind of spot you got.  Veg Edge, 18(11): 4-6.

 

Hoepting, C.A. 2022. Effective post-emergent weed control in onion: Knocking back and knocking out (cover).  Veg Edge, 18(8): 6-9.

 

Hoepting, C.A. 2022. The weed race – Trial notes on spraying small onions with post-emergent herbicides.  Veg Edge, 18(7): 6-7.

 

Hoepting, C.A. 2022. Onion updates and killing of barley nurse crop.  Veg Edge, 18(6): 6.

 

Hoepting, C.A., S.K. Caldwell and E.R. van der Heide.  2022.  Evaluation of cultural practices to reduce bacterial bulb rot in onions that are failing to lodge, 2021.  Plant Disease Management Reports 16: V167.

 

Hoepting, C.A., S.K. Caldwell and E.R. van der Heide.  2022.  Efficacy of fungicide products for control of Botrytis leaf blight and Stemphylium leaf blight in onion in Oswego, 2021.  Plant Disease Management Reports 16: V140.

 

Hoepting, C.A., S.K. Caldwell and E.R. van der Heide.  2022.  Efficacy of FRAC 3 and 7 tank mixes for control of Botrytis leaf blight and Stemphylium leaf blight in onion, 2021.  Plant Disease Management Reports 16: V139.

 

Hoepting, C.A., S.K. Caldwell and E.R. van der Heide.  2022.  Efficacy of fungicide tank mixes for control of Botrytis leaf blight and Stemphylium leaf blight in onion, Elba, 2021.  Plant Disease Management Reports 16: V138.

 

Hoepting, C.A., S.K. Caldwell and E.R. van der Heide.  2022.  Evaluation of in-furrow drenches for control of pink root and Fusarium basal rot in direct seeded onion, 2020-2021.  Plant Disease Management Reports 16: V132.

 

Hoepting, C.A., S.K. Caldwell and E.R. van der Heide.  2022.  Evaluation of in-furrow and soil line drenches for control of pink root and Fusarium basal rot in direct seeded onions, 2021-2022.  Plant Disease Management Reports 16: V174.

 

Hoepting, C.A., S.K. Caldwell and E.R. van der Heide.  2022.  Evaluation of selected pesticides for control of bacterial bulb rot in onion, 2021.  Plant Disease Management Reports 16: V168.

 

Hoepting, C., and B. Nault. 2022. Lorsban is banned: How to control cabbage maggot in brassicas now? Cornell Cooperative Extension, Cornell Vegetable Program. VegEdge 18(4): 4-6. https://rvpadmin.cce.cornell.edu/pdf/veg_edge/pdf235_pdf.pdf.

 

Iftikhar, R., A. Ghosh, and H.R. Pappu. 2022. Mitochondrial genetic diversity of Thrips tabaci (Thysanoptera: Thripidae) in onion growing regions of the USA. J. Econ. Entomol. In Press.

 

Khanal M., B.P. Bhatta, and S. Malla. 2022. Isolation and characterization of bacteria associated with onion and first report of onion diseases caused by five bacterial pathogens in Texas, U.S.A. Plant Dis. https://doi.org/10.1094/PDIS-09-22-2206-SR

 

Khanal, M., B.P. Bhatta, S. Timilsina, S. Ghimire, K. Cochran, and S. Malla. 2023. Curtobacterium allii sp. nov., the actinobacteria species causing onion bulb disease. Antonie van Leeuwenhoek 116:83–96. DOI: https://doi.org/10.1007/s10482-022-01775-z

 

Khanal, M., S. Timilsina, B.P. Bhatta, K. Bophela, T. Coutinho, K. Cochran, and S. Malla. 2022. Pseudomonas uvaldensis sp. nov., a bacterial pathogen causing onion bulb rot, isolated from Texas, USA. Int. J. Syst. Evol. Microbiol. 72:005311. https://doi.org/10.1099/ijsem.0.005311

 

Lai, P.-C., and B. Nault. 2022. Are onion thrips allies of bulb-rot causing bacteria in organic onion production? Cornell Cooperative Extension, Cornell Vegetable Program. VegEdge 18(16):  9-10. https://rvpadmin.cce.cornell.edu/pdf/veg_edge/pdf247_pdf.pdf.

 

Lai, P.-C. and B. Nault. 2022. Do thrips facilitate bulb rot disease? Onion World 38(8): https://issuu.com/columbiamediagroup/docs/onion_world_december_2022?fr=sMzU1YzQ5MDQ1MjQ.

 

Lai, P.-C., L. Iglesias, R.L. Groves, M.J. Havey, and B.A. Nault. 2022. Performance of a semi-glossy onion hybrid in certified organic onion fields infested with Thrips tabaci and bulb-rot causing bacteria. Crop Protect. 160 (1-9). https://doi.org/10.1016/j.cropro.2022.106037

 

Machado-Burke, A., M. Uchanski, and J. Davey. 2022. Evaluation of bactericides to manage slippery skin in onion in Colorado, 2021. Plant Disease Management Reports (PDMR), the American Phytopathological Society (APS), V128.

 

MacKay, H., du Toit, L., Havey, M., and Rogers, P. 2022. Joint Allium research meeting held in Denver showcases latest research on onion production, pests and diseases. Onion World May/June 2022:14-16. https://issuu.com/columbiamediagroup/docs/onion_world_may-june_2022/14

 

MacKay, H., du Toit, L., and Hoepting, C. 2022. Stop the Rot Half-Time Report: News from the Stop the Rot project on onion bacterial diseases. Onion World March/April 2022:16-17.

 

Machado-Burke, A., M. Uchanski, and J. Davey. 2022. Evaluation of bactericides to manage slippery skin in onion in Colorado, 2021. Plant Disease Management Reports (PDMR), the American Phytopathological Society (APS), V128.

 

Murdock, M.R., Pizolotto, C.A., and Woodhall, J.W. 2022. Evaluating Pristine and Luna Tranquility against Botrytis leaf spot, Stemphylium leaf blight and other foliar diseases on drip-irrigated onions in Idaho, 2020. Plant Disease Management Reports 16, V105.

 

Murray, K., I. Sandlin, P. Ellsworth, P. Jepson, A. Fournier, H. Luh and S. Reitz. 2022. The Economic Impact of Onion Pests in the Treasure Valley - A Look at Pests and Associated Management Practices, 2018–2019. Oregon State University Extension Service, EM 9347, 34 pp. https://catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/em9347.pdf

 

Myers, B. Shin, G.Y., Stice, S., Agarwal, G., Gitaitis, R., Kvitko, B., and Dutta, B.  2022. Genome-wide association and dissociation studies in P. ananatis reveal potential virulence factors affecting Allium porrum and A. fistulosum x A. cepa hybrid. Frontiers in Microbiology (in press)

 

Nault, B.A. 2022. Onion thrips control in onion, 2021. Arthropod Management Tests 47(1): tsac052, https://doi.org/10.1093/amt/tsac052.

 

Nault, B.A. 2022. Onion maggot control using seed treatments in onion, 2021. Arthropod Management Tests, 47(1): tsac055, https://doi.org/10.1093/amt/tsac055.

 

Nault, B., and C. Hoepting. 2022. Guidelines for maggot and disease control in onion with an emphasis on seed treatments. Cornell Cooperative Extension, Cornell Vegetable Program. VegEdge 18(22):  7-10. https://rvpadmin.cce.cornell.edu/pdf/veg_edge/pdf253_pdf.pdf.

 

Nault, B., and C. Hoepting. 2022. Guidelines for maggot and disease control in onion with an emphasis on seed treatments. Cornell Cooperative Extension, Cornell Vegetable Program. VegEdge 18(22):  7-10. https://rvpadmin.cce.cornell.edu/pdf/veg_edge/pdf253_pdf.pdf.

 

Nault, B.A. and C. Hoepting. 2022. Seed treatments: What to know to protect your 2023 onion crop. Onion World 38(7): 28-31. https://issuu.com/columbiamediagroup/docs/onion_world_november_2022?fr=sYmE1NDQ5MDQ1MjQ.

 

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. 115(2): 618–623. https://doi.org/10.1093/jee/toac016

 

Qian, Y., Hua, G.K.H., Scott, J.C., Dung, J.K.S., and Qian, M. 2022. Evaluation of sulfur-based biostimulants for the germination of Sclerotium cepivorum sclerotia and their interaction with soil. Journal of Agricultural and Food Chemistry Manuscript (in print). https://doi.org/10.1021/acs.jafc.2c05862

 

Regan, K.H. and B.A. Nault. 2022. Impact of reducing synthetic chemical inputs on pest and disease management in commercial onion production systems. Agronomy 12(6), 1292; https://doi.org/10.3390/agronomy12061292

 

Shahabeddin Nourbakhsh, S. and C.S. Cramer. 2022. Onion germplasm possess lower early season thrips numbers. Horticulturae 8:123. https://doi.og/10.3390/horticulturae8080123.

 

Shahabeddin Nourbakhsh, S. and C.S. Cramer. 2022. Onion size measurements as predictors for onion bulb size. Horticulturae 8:682. https://doi.og/10.3390/horticulturae8080682.

 

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

 

Sidhu, J., Dubose, J., Fernberg, J. and Aegerter, B.J. 2022. Evaluation of bactericides for management of bacterial leaf blight and bacterial bulb rot in onions, 2021. Plant Disease Management Reports 16:V026. https://doi.org/10.1094/PDMR16

 

Wilson, R., K. Nicholson, and B. Aegerter. 2022. The influence of irrigation method on bacterial diseases of onion in Northeast California, 2021 Plant Disease Management Reports 16: V154. https://doi.org/10.1094/PDMR16

 

Woodhall, J., M. Murdock, K. Beck and M. Thornton. 2021. Pink root disease of onion – biology and control. Extension Bulletin 1000, University of Idaho.

Colorado

 

Zhao, M., Tyson, C., Chen, H.C., Paudel, S., Gitaitis, R., Kvitko, B., and Dutta. B. 2022. 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.

 

Zhao, M., Shin, G.Y., Stice, S., Coutinho, T., Gitaitis, R., Kvitko, B., and Dutta, B.  2022.  A novel biosynthetic gene cluster across the Pantoea species complex is important for pathogenicity in onion.  Mol. Plant Microbe Interact. (in press)

 

Zhao, M., Tyson, C., Gitaitis, R.,  Kvitko, B., and  Dutta, B. 2022. Rouxiella badensis, a new bacterial pathogen of onion causing bulb rot. Frontiers in Microbiology 13:1054813.

05/03/2024

05/29/2025

Publications (January 1, 2024 to December 30, 2024)

1. Publications in scientific journals

de Jesus, H.I., Cassity-Duffey, K., Dutta, B., da Silva, A.L.B.R., Coolong, T. 2024. Influence of Soil Type and Temperature on Nitrogen Mineralization from Organic Fertilizers. Nitrogen 5: 47–61. https://doi.org/10.3390/nitrogen5010004.

Greenway, G., B., Nault, S. Rondon, and S. Reitz. 2024. Extension impacts on onion IPM:  Current perspectives from the industry. The Journal of Extension, 62(3), Article 21. https://open.clemson.edu/joe/.

Hua, G.K.H., Wilson, R.G., and Dung, J.K.S.. 2024. Evaluation of bait crops for the integrated management of white rot (Sclerotium cepivorum) in Allium crops. Plant Disease 108(1):118-124. https://doi.org/10.1094/PDIS-04-23-0688-RE.

Hoepting, C.A, S.K. Caldwell and S.L. Mertson. 2024. Evaluation of fungicide tank mixes for control of Botrytis leaf blight and Stemphylium leaf blight in onion, Elba, NY, 2023. Plant Disease Management Reports, 18: V114. https://doi-org.proxy.library.cornell.edu/10.1094/PDMR18.

Hoepting, C.A, S.K. Caldwell and S.L. Mertson. 2024. Evaluation of FRAC 3 fungicides for control of Botrytis leaf blight and Stemphylium leaf blight in onion, Elba, NY, 2023. Plant Disease Management Reports, 18: V114. https://doi-org.proxy.library.cornell.edu/10.1094/PDMR18.

Hoepting, C.A, S.K. Caldwell and S.L. Mertson. 2024. Evaluation of FRAC 3 fungicides for control of Botrytis leaf blight and Stemphylium leaf blight in onion, Wolcott, NY, 2023. Plant Disease Management Reports, 18: V116. https://doi-org.proxy.library.cornell.edu/10.1094/PDMR18.

Hoepting, C.A, S.K. Caldwell and S.L. Mertson. 2024. Evaluation of fungicide tank mixes for control of Botrytis leaf blight and Stemphylium leaf blight in onion, Wolcott, NY, 2023. Plant Disease Management Reports, 18: V118. https://doi-org.proxy.library.cornell.edu/10.1094/PDMR18.

Hoepting, C.A. and S.K. Caldwell.  2024.  Effect of pulling onions early and fast curing with artificially heated forced air on a drying wall in a box storage on bacterial bulb rot in onion, 2023.  Plant Disease Management Reports, 18: V113.

Hoepting, C.A., N.K. Gropp and S.K. Caldwell.  2024.  Evaluation of two phenotypic screening assays for bacterial bulb rot of onion, Elba, NY, 2022-2023.  Plant Disease Management Reports, 18: V112.

Koirala, S. Shin, G. Y., Kvitko, B., and Dutta, B. 2024. Integrating biocontrol agents with copper for center rot management in onion. Crop Protection (in press)

Komondy, L., M. Fuchs, and B. A. Nault. 2024. Localization of Iris yellow spot virus in naturally infected onion plants: A sampling approach for reliable diagnosis. Plant Health Progress https://doi.org/10.1094/PHP-05-24-0046-RS.

Komondy, L., C. Hoepting, S. J. Pethybridge, M. Fuchs, and B. A. Nault. 2024. Development of a sequential sampling plan for classifying Thrips tabaci (Thysanoptera: Thripidae) populations in onion fields. J. Econ. Entomol. https://doi.org/10.1093/jee/toae161.

Lenon, K.M., Dutta, B., Coma, M. Q., Johnson, W., and Schmidt, J. 2024. From weeds to natural enemies: implications of weed cultivation and biopesticides for organic onion production. Journal of Economic Entomology (in press)

Liakos, C., Ibanez, V., Lebre, P.H., Derie, M.L., van der Waals, J., du Toit, L.J., Dutta, B., Kvitko, B., Cowan, D.A., and Coutinho, T.A. 2024. The bacterial and viral communities associated with onion bacterial bulb rot. Phytobiomes Journal: accepted 14 May 2024.

Liakos, C., Ibanez, V., Lebre, P. H., Derie, M. L., Waals, J. L., duToit, L., Dutta, B., Kvitko, B., Cowan, D.A., and Coutinho, T.A. 2024. The bacterial and viral communities associated with onion bacterial bulb rot. Phytobiomes (in press).

Paudel, S., Zhao, M., Dutta, B., and Kvitko, B. 2024. Thiosulfinate tolerance gene clusters are common features of Burkholderia onion pathogens. Molecular Plant Microbe Interactions (first look) (Editor’s Pick)

Paudel, S., Franco, Y., Zhao, M., Dutta, B. , Kvitko, B.H. 2025. Distinct Virulence Mechanisms of Burkholderia gladioli in Onion Foliar and Bulb Scale Tissues. Molecular Plant-Microbe Interactions https://doi.org/10.1094/MPMI-10-24-0129-R.

Paudel, S., Dutta, B., and Kvitko, B. 2024. Onion pathogenic Burkholderia species: Role and regulation of characterized virulence determinants. Plant Pathology (in press)

Qian, Y., Hua, G.K.H., Dung, J.K.S., and Qian, M. 2024. Encapsulation of garlic oil and diallyl disulfide with β-cyclodextrin for white rot control in Allium crops. Crop Protection 178:106597. https://doi.org/10.1016/j.cropro.2024.106597.

Racine, J., Nerney, A., Kilgore, S., Waters, T., Critzer, F., Harris, L. J., Reitz, S., and Waite-Cusic, J. 2024. Escherichia coli Survival on Dry Bulb Onions Treated with Crop Protection Sprays Prepared using Contaminated Water in the Treasure Valley Growing Region. Journal of Food Protection. 87: 100373 https://doi.org/10.1016/j.jfp.2024.100373.

Salgado, L. D., L. A. Rosen, O. Vetrovec, N. Hessler, P. Wang, A. G. Taylor, and B. A. Nault. 2025. Practical resistance to spinosad in an onion maggot (Diptera: Anthomyiidae) population in New York. J. Econ. Entomol., toaf057, https://doi.org/10.1093/jee/toaf057.

Sharma, S. and C.S. Cramer. 2024. Validating single nucleotide polymorphism markers for Fusarium basal rot resistance in short-day onion cultivars through kompetitive allele-specific PCR. Crop Breed. Genet. Genom. 6(3):e240006. https://doi.org/10.20900/cbgg20240006.

Sharma, S., S. Mandal, and C.S. Cramer. 2024. Recent advances in understanding and controlling Fusarium diseases of Alliums. Horticulturae 10:527. https://doi.org/10.3390/horticulturae10050527.

Shin, G.Y., Asselin, J.A., Smith, A., Aegerter, B., Coutinho, T., Zhao, M., Dutta, B. , Mazzone, J., Neupane, R., Gugino, B., Hoepting, C., Khanal, M., Malla, S., Nischwitz, C., Sidhu, J., Burke, A.M., Davey, J., Uchanski, M., Derie, M.L., Toit, L.J.D., Stresow-Cortez, S., Bonasera, J.M., Stodghill, P., Kvitko, B. Plasmids encode and can mobilize onion pathogenicity in Pantoea agglomerans. The ISME Journal 19:1

Thapa S., du Toit L., Waters T., Derie M., Schacht B., and G.T. LaHue. Effects of irrigation frequency on onion bacterial bulb rot in the Columbia Basin of Washington State, 2023-24. Plant Disease Management Reports. 18:CF075.

Thapa S., du Toit L., Waters T., Derie M., Schacht B., and G.T. LaHue. Effects of nitrogen management on onion bacterial bulb rot in the Columbia Basin of Washington State, 2023-24. Plant Disease Management Reports. 18:CF076.

Valenzuela, M., MacLellan, M.P., Guajardo, J., Dorta, F., Seeger, M., and Dutta, B., 2024. First Report of Erwinia aphidicola causing bulb rot of Onion in Chile. Plant Disease 108(9): 2915.

Wilson, R. G., Aegerter, B. J., & LaHue, G. (2024). The Influence of Sprinkler and Drip Irrigation on the Incidence and Severity of Bacterial Disease in Onions Grown in Northeast California. Plant Health Progress, PHP-01. https://doi.org/10.1094/PHP-01-24-0002-RS

 

2. Abstracts and Papers at International/National Professional Meetings

Komondy, L., and B. A. Nault. 2024 Improving onion thrips management: Developing machine learning-enhanced, spatially optimized sequential sampling plan. In Member Symposium: Metamorphosis- From John Henry Comstock Award Winners to Future Leaders in Entomology. Entomological Society of America Annual Meeting, Phoenix, AZ, November 12, 2024.

Komondy, L., and B. A. Nault. 2024. Development of a sequential sampling plan for surveilling onion thrips in onion to reduce sampling effort involved in management decision-making. XXVII International Congress of Entomology, Kyoto, Japan. August 25–30.

Komondy, L., and B. A. Nault. 2024. Optimizing early-season control of iris yellow spot virus transmission: A targeted spray program for enhanced efficacy against adult onion thrips. Entomological Society of America Eastern Branch Meeting, Morgantown, West Virginia, USA. March 10, 2024. (Note:  Awarded First Place in the Ph.D. Student Competition 10-minute paper).

Neupane, R., J.D. Mazzone, C.A. Hoepting, B.K. Gugino. 2024. Peeling the rotten onion: A three-year bacterial survey of onion fields across Pennsylvania and New York. (Abstr.) Phytopathology 114:S1.148.

Pineros-Guerrero, N., Hay, F. S., Heck, D. W., Klein, A., Hoepting, C., and Pethybridge, S. J. 2024. Determining the contribution of onion volunteers to the population genetics of Stemphylium vesicarium in New York, USA, using microsatellite markers. Proc. APS North-East Division Meeting, Ithaca, NY. Pp. 10. 6 March 2024.

Salgado, L. D, A. G. Taylor, R. G. Wilson, and B. A. Nault. 2024. Performance of insecticide seed treatments for managing Delia spp. (Diptera: Anthomyiidae) in onion fields (poster). XXVII International Congress of Entomology, Kyoto, Japan. August 25–30.

 

3. Presentations at Grower Meetings and Field Days

Cramer, C.S. Onion leaf wax and thrips feeding preference. 2024 NMSU Onion Research Workshop, Las Cruces, NM, 5 June 2024.

Dung: Evaluation of Encapsulated Sclerotial Germination Stimulants for White Rot Management. California Garlic and Onion Symposium, 2024. February 12, 2024. Tulare, CA.

du Toit, L.J. 2024. Soilborne plant disease control – Best practices. Invited presentation, Pest Management Session, Pacific Northwest Vegetable Association Annual Convention & Trade Show, 13-14 Nov. 2024, Kennewick, WA (~250 people)

du Toit, L.J. 2024. Stop the Rot: Overview of the national onion bacterial project. Invited presentation, Onion Session, Pacific Northwest Vegetable Association Annual Convention & Trade Show, 13-14 Nov. 2024, Kennewick, WA (~250 people)

du Toit, L.J. 2024. Stop the Rot: 2023-24 Trial results for Columbia Basin onion growers. Invited presentation, Onion Session, Pacific Northwest Vegetable Association Annual Convention & Trade Show, 13-14 Nov. 2024, Kennewick, WA (~250 people)

du Toit, L.J. 2024. Black mold. Invited presentation to KORKOM onion growers’ association in Western Cape, South Africa. 20 Sep. 2024, online (35 people)

du Toit, L.J. 2024. “Stop the Rot”: Grower-relevant results from a national onion bacterial project. Invited 2-h presentation and discussion with Wisconsin muck onion growers, 25 Mar. 2024, online, OR (10 people)

du Toit, L.J. 2024. Conquering recalcitrant diseases using the art and science of plant pathology. Invited seminar to Dept. of Plant Pathology, The Ohio State University, 12 Feb. 2024, Columbus, OH. (~60 people)

du Toit, L.J. 2024. Applied outcomes and practical solutions from emerging from the ‘Stop the Rot’ onion bacterial project. Invited presentation, Wisconsin Muck Farmers’ Association Annual Research Meeting and Wisconsin Potato and Vegetable Growers’ Annual Meeting, 7 Feb. 2024, online presentation. (22 people)

du Toit, L.J. 2024. “Stop the Rot”: Grower-relevant results from a national onion bacterial project. Invited presentation, Annual Meeting of Idaho-Malheur Co. Onion Grower Association, 6 Feb. 2024, Ontario, OR (~150 people)

du Toit, L.J. 2024. Stop the Rot: A national effort to minimize the impact of onion bacterial diseases. Invited presentation to vegetable seed industry personnel, followed by discussions on disease management in vegetable seed crops, 31 Jan. 2024, Oudtshoorn, South Africa. (70 people)

du Toit, L.J. 2024. Stop the Rot: A national effort to minimize the impact of onion bacterial diseases. Invited presentation to du Toit Farms production team, followed by general discussion on onion disease management, 30 Jan. 2024, Ceres, South Africa. (20 people)

du Toit, L.J. 2024. Stop the Rot: A national effort to minimize the impact of onion bacterial diseases. Invited presentation to KORKOM Onion Producers’, followed by general discussion on disease management in onion crops, 30 Jan. 2024, Ceres, South Africa. (25 people)

du Toit, L.J. 2024. Stop the Rot: A national effort to minimize the impact of onion bacterial diseases. Invited presentation to Northern Cape Onion Producers’ Association, followed by general discussion on disease management in onion crops, 29 Jan. 2024, Kimberly, South Africa. (60 people)

du Toit, L.J. 2024. Stop the Rot: A national effort to minimize the impact of onion bacterial diseases. Invited presentation to ZZ2 Farms production team, followed by general discussion on vegetable disease management, 27 Jan. 2024, Mooketsi, Limpopo Province, South Africa. (15 people)

du Toit, L.J. 2024. Conquering recalcitrant diseases using the art and science of plant pathology. Keynote presentation, 53rd Congress of the Southern African Society of Plant Pathology, 22-25 Jan. 2024, Golden Gate National Park, South Africa. (150 people)

du Toit, L.J. 2023. ‘Stop the Rot’ and other onion disease research at WSU. Invited presentation to AusVeg and HortInnovation meeting with onion growers/stakeholders in South Australia, 27 Nov. 2023, Murray Bridge, Australia. (35 people)

du Toit, L.J. 2023. Stakeholder engagement in research and extension programming: An essential aspect of management recalcitrant plant diseases. Invited presentation, 2023 Conference of the Australasian Plant Pathology Society, Adelaide, Australia, 20-24 Nov. 2023. (~250 people)

du Toit, L.J. 2023. Late season fungal and bacterial diseases of onion. Invited presentation, Onion Session, Pacific Northwest Vegetable Association Annual Convention & Trade Show, 15-16 Nov. 2023, Kennewick, WA. (~250 people)

du Toit, L.J. 2023. Stemphylium leaf blight of onion – Biology and control. Invited presentation, Onion Session, Pacific Northwest Vegetable Association Annual Convention & Trade Show, 15-16 Nov. 2023, Kennewick, WA. (~250 people)

du Toit, L.J. 2023. Environmental influences on plant diseases in the Pacific Northwest. Invited presentation, WSU Research Symptosium on “Integrated Pest Management in a Changing Climate”, Tilth Conference, 26-28 Oct. 2023, Port Townsend, WA. (~70 people)

Field Day: Snake River Weed Control Tour, June 19, 2024. Ontario, OR.

Field Day: Malheur Experiment Station Summer Field Day, July 10, 2024. Ontario, OR.

Field Day: Malheur Experiment Station Onion Field Day, August 28, 2024. Ontario, OR.

Hay, F.S., Hoepting, C., Grundberg, E., Klein, A.  2024.  Assessing and reducing the impact of plant-parasitic nematodes on onion production in New York.  Feb. 26, 2024.  Presentation to Onion Research Development Program Committee. Speaker, 20 minutes.  Attendees: 10.

Hay, F.S. 2024.  Agriculture in New York State.  Invited speaker Onions, N.Z. Pukekohe Research Station, Pukekohe, New Zealand.  Jan. 17, 2024.  Speaker 20 minutes.  Attendees: 20.

Hay, F.S., Hoepting, C., Heck, D., Klein, A., Pethybridge, S.J. 2024.  Stemphylium leaf blight – a continually evolving problem for onion growers in New York.  Invited speaker Onions, N.Z. Pukekohe Research Station, Pukekohe, New Zealand.  Jan 17, 2024. Speaker, 60 minutes.  Attendees: 20.

Hay, F.S., Hoepting, C., Heck, D., Klein, A., Pethybridge, S.J. 2024.  Stemphylium leaf blight – a continually evolving problem for onion growers in New York.  Invited speaker Onions, N.Z. Ashburton Hotel.  Jan 19, 2024. Speaker, 60 minutes.  Attendees: 20.

Hoepting, C.A. 2024. Finishing strong: Harvest practces that reduce bacterial bulb rot. Empire State Producers Expo, Syracuse, NY. January 24, 2024 (30 minutes) – 24 attendees.

Hoepting, C.A. 2024. Managing Stemphylium leaf blight of onion with emerging fungicide resistance in New York. Wisconsin Onion Muck Meeting. Virtual Zoom: February 7, 2024 (30 minutes) – 22 attendees.

Hoepting, C.A. 2024. Refining fungicide programs for Stemphylium leaf blight management in onion. Orange County Onion School. Pine Island, NY: February 28, 2024 (30 minutes) – 50 attendees.

Hoepting, C.A. 2024. Stop the Rot Finale: Progress towards understanding and managing bacterial bulb rot in onion. Orange County Onion School. Pine Island, NY: February 28, 2024 (30 minutes) – 50 attendees.

Hoepting, C.A. 2024. Preparing for Optogen herbicide in New York: A review of bicyclopyrone weed control in onion. Orange County Onion School. Pine Island, NY: February 28, 2024 (30 minutes) – 50 attendees.

Hoepting, C.A. 2024. Stop the Rot Finale: Progress towards understanding and managing bacterial bulb rot in onion. Oswego Muck Onion Pre-Season Meeting, Phoenix, NY: March 20, 2024 (45 minutes) – 24 attendees.

Hoepting, C.A. 2024. Stop the Rot Finale: Progress towards understanding and managing bacterial bulb rot in onion. Elba muck Onion Pre-Season Meeting, Elba, NY: March 29, 2024 (45 minutes) – 13 attendees.

Hoepting, C.A. 2024. 2023 research highlights and new recommendations for Stemphylium leaf blight and Botrytis leaf blight in onion. Annual Muck Onion Twilight Meeting in Oswego Co. Oswego, NY: June 20, 2024 (45 minutes) – 69 attendees.

Hoepting, C.A. 2024. Onion herbicide trial tour featuring pre- and post-emergent control of marsh yellowcress, Lamb’s quarters and ragweed2023 research highlights and new recommendations for Stemphylium leaf blight and Botrytis leaf blight in onion. Annual Muck Onion Twilight Meeting in Oswego Co. Oswego, NY: June 20, 2024 (60 minutes) – 69 attendees.

LaHue, G.T., Thapa, S., du Toit, L.J., and Waters, T. 2024. Irrigation management impacts on onion bacterial bulb rot. WSU Onion Field Day, Prosser, WA, August 29th, 2024.

Nault, B.A. 2024. Onion maggot management update. Oswego Onion Growers Winter Meeting. Oswego, NY. December 12, 2024. Speaker, 20 minutes. Attendees: 25.

Nault, B. A., and L. Salgado. 2024. Onion insect pest management update featuring seed treatment combinations for onion maggot control. 2024 Muck Onion Growers Twilight Meeting in Oswego. Cornell Cooperative Extension, Cornell Vegetable Program. Oswego, NY. June 20, 2024. Speaker, 40 minutes. Attendees: 75.

Nault, B.A. 2024. Controlling onion maggot with seed treatments. Muck Grower Information Days (Ontario, Canada). Virtual. April 4, 2024. Speaker, 25 min. Attendees: N/A

Nault, B. A., and L. Komondy. 2024. Onion thrips and IYSV management update. Elba Onion Growers Preseason Meeting. Cornell Cooperative Extension, Cornell Vegetable Program. March 29, 2024. Speaker, 60 minutes. Attendees: 12.

Nault, B. A. 2024. Seedcorn maggot, onion maggot, and onion thrips management updates for 2024. 2024 Orange County Onion School. Cornell Cooperative Extension Eastern New York Commercial Horticulture Program. Pine Island, NY. February 28, 2024. Speaker, 60 minutes. Attendees: 60.

Nault, B.A. 2024. Insect management (Onion Session). Empire State Producer’s EXPO. New York Vegetable Growers Association. Syracuse, NY. January 24, 2024. Speaker, 30 minutes. Attendees:  35.

Nault, B. A. 2024. Seeking alternatives to neonicotinoid insecticides for insect pest management in vegetable crops. New York State Agriculture and Markets Review of CALS Research. Geneva, NY, Speaker, 15 minutes. 

Neupane, R.C, and Gugino, B. 2024. Peeling the rotten onion: Bacterial diseases and copper bactericides. Mid-Atlantic Fruits and Vegetable Growers Convention, 31 January 2024, Hershey, Pennsylvania.Putman, A.I. Evaluation of weather-based models for management of onion downy mildew. California Garlic and Onion Symposium, UC Cooperative Extension, February 12 2024, Tulare, CA.

Putman, A.I. Downy mildew diseases of vegetables. Vegetable Production and IPM Workshop, UC Cooperative Extension Imperial County, February 28 2024, Imperial, CA.

Putman, A.I. Overview of onion and garlic diseases. Onion and Garlic Production Meeting, UC Cooperative Extension Riverside County, October 17 2024, Blythe, CA.

Reitz: Thrips Management and the Impact of Thrips on Stemphylium Leaf Blight  and Bulb Rots. Idaho-Malheur County Onion Growers Meeting, February 6, 2024. Ontario, OR.

Reitz: What you cannot see is harming your onions: Wireworms, Maggots, and Bulb Mites. Idaho-Malheur County Onion Growers Meeting, February 6, 2024. Ontario, OR.

Reitz: Onion Thrips Management in Dry Bulb Onions. Pacific Northwest Vegetable Association, November 13, 2024. Kennewick, WA.

Schutte, B. Improving weed control programs for onions. 2024 NMSU Onion Research Workshop, Las Cruces, NM, 5 June 2024.

Sharma, S. and C S. Cramer. Breeding for Fusarium basal rot resistance. 2024 NMSU Onion Research Workshop, Las Cruces, NM, 5 June 2024.

Thapa, S., du Toit, L.J., Waters, T., and LaHue, G.T. 2024. Irrigation management: An inexpensive way to reduce the risk of bacterial rot of onions grown in the Columbia Basin of Washington State. Oral and poster presentation at the 2024 ASA, CSSA, SSSA International Annual Meeting, San Antonio, TX, November 12th, 2024.

Thapa, S., du Toit, L.J., Waters, T., and LaHue, G.T. 2024. Stop the Rot: Revisiting nitrogen fertility practices in onion production in the context of bacterial diseases. Oral and poster presentation at the 2024 ASA, CSSA, SSSA International Annual Meeting, San Antonio, TX, November 11th, 2024.

Thapa, S., du Toit, L.J., Waters, T., and LaHue, G.T. 2024. Nitrogen management impacts on onion bacterial bulb rot. WSU Onion Field Day, Prosser, WA, August 29th, 2024.

Waters, T. D. 2024. Seedcorn Maggot Control in Onions. Pacific Northwest Vegetable Association Annual Meeting, Kennewick, WA. (November 13, 2024). Invited.

Waters, T. D. 2024.  Potato and Onion Insect Management Update. Agrinorthwest Agronomy Update, AgriNorthwest Farms, Plymouth, WA. 14 Feb. 2024. Invited.

Waters, T.D., and du Toit, L.J. 2023. ‘Stop the Rot’ onion bacterial project: Grower-relevant results. Invited presentation, Onion Session, Pacific Northwest Vegetable Association Annual Convention & Trade Show, 15-16 Nov. 2023, Kennewick, WA. (~250 people)

Woodhall, J., Onion diseases update. Idaho Onion Growers Association and Malheur County Onion Growers Association conference. Ontario, OR. Feb. 6, 2024

Woodhall, J., Updates on Stemphylium leaf blight. Idaho Onion Growers Association and Malheur County Onion Growers Association conference. Ontario, OR. Feb. 6, 2024

Woodhall, J., Fungicide resistance. Idaho IPM webinar. 2024.

 

4. Newsletter Articles

du Toit, L.J. Abnormal onion development from the wide temperature swing in April 2023, resembling herbicide injury. Veg Edge 20(13):5 (26 Jun. 2024).

Hoepting, C.A. 2024. Controlling volunteer potato in onion: Start Early! Cornell Cooperative Extension – Cornell Vegetable Program Extension Grower newsletter, Veg Edge, 20(7): 1, 3-4 (cover story) (May 15, 2025).

Hoepting, C.A. and F.S. Hay. 2024. Stemphylium leaf blight (SLB) of onion 2023 research highlights and implications for management in 2024: Part I – The FRAC 3 situation. Cornell Cooperative Extension – Cornell Vegetable Program Extension Grower newsletter, Veg Edge, 20(14): 8-10 (July 10, 2024).

Hoepting, C.A. and F.S. Hay. 2024. Stemphylium leaf blight (SLB) of onion 2023 research highlights and implications for management in 2024: Part II – Piecing together tank mixes with low-risk mediocre products (FRAC M5, 2, 12, 19, P07). Cornell Cooperative Extension – Cornell Vegetable Program Extension Grower newsletter, Veg Edge, 20(15): 9-10 (July 17, 2024).

Hoepting, C.A. and F.S. Hay. 2024. Botrytis leaf blight (BLB) necrotic spots of onion are driving us crazy! But they are important and can be controlled with fungicides. Cornell Cooperative Extension – Cornell Vegetable Program Extension Grower newsletter, Veg Edge, 20(16): 8-10 (July 24, 2024).

Hoepting, C.A.  2024.  How much rot you got? Pre-harvest assessment of bacterial bulb rot in onion and management options.  Cornell Cooperative Extension – Cornell Vegetable Program newsletter, Veg Edge, 20(20): 6-8 (August 21, 2024).

Neupane, R., J.D. Mazzone, and B.K. Gugino. 2024 Rotten to the Core: The Center Rot Disease of Onion. Penn State Extension. https://extension.psu.edu/rotten-to-the-core-the-center-rot-disease-of-onion

 

5. Other (e.g. Youtube videos etc.)

Cumagun, C.J.R, Wood B., Woodhall, J.W., Onion quick facts. BUL1084. 2024.

Cumagun, C.J., M. Thornton, S.R. Reitz, and J.W. Woodhall. 2024. Iris yellow spot virus: A threat to onion seed and bulb crops in Idaho. University of Idaho Extension.

Dung, J., Scott, J., Qian, Y.P., and Qian, M. 2023. Evaluating Encapsulated Sclerotial Germination Stimulants for White Rot Management. Central Oregon Agricultural Research and Extension Center 2023 Annual Report:23-25.

Greenway, G., B.A. Nault, S. Rondon, and S.R. Reitz. 2024. Extension Impacts on Onion IPM:  Current Perspectives from the Industry. Journal of Extension. 62(3), Article 21. https://open.clemson.edu/joe/vol62/iss3/21.

Hoepting, C.A. 2024. Cornell onion (dry bulb) fungicide “Cheat Sheet” for control of leaf diseases in New York, 2024. Cheat Sheet: Cornell Cooperative Extension – Cornell Vegetable Program Website. Posted: July 1, 2024 (2 pages). https://cvp.cce.cornell.edu/submission.php?id=904&crumb=crops|crops|onions|crop*20.

Hoepting, C.A. and S.K. Caldwell.  How to identify foliar symptoms of bacterial diseases in onion. 4:19 min.  Posted April 1, 2024: https://www.youtube.com/watch?v=pTYmdIwjbao. (893 views on May 9, 2025).

Hoepting, C.A. 2023. Tour of on-farm onion fungicide trial for Botrytis leaf blight and Stemphylium leaf blight.  Elba, NY: August 20, 2024 (60 minutes) - 8 attendees.

Neupane, R., and Gugino, B. 2024. Peeling the rotten onion: Bacterial diseases and copper bactericides. Proceedings of the Mid-Atlantic Fruits and Vegetable Growers Convention, 31 January 2024, Hershey, Pennsylvania.

Neupane, R.C., “Bacterial diseases of onion and copper bactericides”. Food Science Institute, University of Debrecen, Hungary. October 21, 2024

Salgado, L. D., B. Nault and R. Wilson. 2024. Maggots-Be-Gone: An update on insecticide seed treatment performance. Onion World 40(8): 6-9.

Wilson, R. et al. 2024. Insecticide Treatments to Protect Spring-Seeded Onions from Maggots. IREC Research Progress Report #206. Cooperative Extension, University of California, PO Box 850, Tulelake CA 96134