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Helene R. Dillard Campus Address: Dept.of Plant Pathology and Plant-Microbe Biology Website:http://www.nysaes.cornell.edu/pp/faculty/dillard Phone: 607-255-2237 (Ithaca), 315-787-2469 (Geneva) Division of Effort Complete CV – html | pdf |
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ACADEMIC RANKS (year achieved) PRIMARY DEPARTMENTAL/Unit PROGRAM AREA Research and extension on fungal and bacterial diseases of vegetable crops AREAS OF EXPERTISE (key words) · Extension/outreach, research/extension integration PROFESSIONAL OVERVIEW AND OBJECTIVES Overall program efforts concentrate on the biology, ecology, and management of fungal diseases of vegetables and dissemination of the information to the vegetable industry. Major projects have included studies on the epidemiology and management of anthracnose diseases with emphasis on Colletotrichum lindemuthianum on beans and Colletotrichum coccodes on tomatoes; biology and management of Sclerotinia sclerotiorum on beans and cabbage with an emphasis on cultural practice management, and biological and chemical control strategies; biological control of Botrytis cinerea on greenhouse tomatoes; epidemiology and sustainable management of Alternaria leaf spot on crucifers caused by Alternaria brassicicola; quantitative epidemiology and management of rust caused by Puccinia sorghi on sweet corn; and epidemiology of Stewart's bacterial wilt of corn caused by Erwinia stewartii. Project foci for 2007 were on sustainable management of Sclerotinia sclerotiorum on snap and dry beans and development of a mold control decision tool for snap and dry bean producers, identification and control of soybean rust (Phakopsora pachyrhizi) on snap and dry beans, quantitative epidemiology of Puccinia sorghi on sweet corn in New York State, and identification of the causal agent of “spotty beans” and sustainable disease control strategies. Vegetable disease information is disseminated to local, regional, and statewide extension educators, to fresh and processing food industry representatives, and to private crop consultants. Dissemination mechanisms include oral presentations at meetings organized by extension educators and private industry, hands-on training at disease workshops, newsletter articles, and fact sheets.
Scientific Exchange visit to the People’s Republic of China under the Cornell-China agreement, July 6-16, 2000. Exchange was with Shenyang University scientists studying biological control of vegetable pathogens and sustainable vegetable production practices. Comprehensive review of the College of Agriculture, American University of Beirut, Lebanon, June 5-13, 1999. Participated in a comprehensive review of the teaching, research, and outreach programs in the college. Initiated discussions on collaborative research with Cornell University. Comprehensive review of the College of Agriculture, American University of Beirut, Lebanon, June 5-13, 1999. Participated in a comprehensive review of the teaching, research, and outreach programs in the college. Initiated discussions on collaborative research with Cornell University. Return visit to Zimbabwe, Africa, in May of 1998, sponsored by the CIIFAD program. Assessed the impact of the previously produced disease fact sheets on smallholder producers and their management practices. Prioritized disease and insect research and outreach needs. Return visit to Zimbabwe, Africa, in May of 1998, sponsored by the CIIFAD program. Assessed the impact of the previously produced disease fact sheets on smallholder producers and their management practices. Prioritized disease and insect research and outreach needs. Leadership exchange visit to Brazil under the National Extension Leadership Development program (Class V), November 3-16, 1996. Member in a class of 25 Extension professionals in a leadership development program exploring fundamental changes in a foreign society and comparing those with changes in the US. Scientific exchange visit to the People's Republic of China under the US-PRC Agreement on Agricultural Cooperation in Science and Technology, October 11-25, 1996. Member of 5 person interdisciplinary team of scientists from Cornell University looking at biological control of vegetable pests and specific projects for future collaboration. Consultation visit on CIIFAD program to Zimbabwe, Africa, March 1993; determined pest management needs of small farmers in Zimbabwe and discussed solutions; advised on projects and possible graduate student research that could link the two universities; prepared 3 extension fact sheets for use in Zimbabwe. Consultation visit on CIIFAD program to Zimbabwe, Africa, March 1993; determined pest management needs of small farmers in Zimbabwe and discussed solutions; advised on projects and possible graduate student research that could link the two universities; prepared 3 extension fact sheets for use in Zimbabwe. Attended the British Society of Plant Pathology Anniversary Meeting, Bath, England, December 1990. Participated in the Colletotrichum workshop; poster presentation on Colletotrichum coccodes research. Invited participant on a tour of major crucifer seed production areas in Holland, September 1989. Presented a seminar on disease control in cabbage, with emphasis on cabbage diseases affecting production in New York. Invited speaker at a workshop on cabbage pest management at Escuela Agricola Panamericana, El Zamorano, in Honduras, March 1988. Information on cabbage disease control given in an oral presentation. Discussed possible cooperative projects on control of Mycosphaerella on cabbage. HONORS AND AWARDS · APS Fellow, The American Phytopathological Society, 2006
Total Completed
GRADUATE MINORS Total Completed
Alpha Zeta, 2007-present Shah, D.A., Dillard, H. R., Mazumdar-Leighton, S., Gonsalves, D., and Nault, B.A. 2006. Incidence, spatial patterns, and associations among viruses in snap bean and alfalfa in New York. Plant Disease 90:203-210. Shah, D.A., Dillard, H.R., and Nault, B.A. 2005. Sampling plans for the incidence of aphid-transmitted viruses in snap bean. Phytopathology 95: 1405-1411. Dillard, H.R., Cobb, A.C., Shah, D.A., and Straight, K.M. 2005. Identification and Characterization of Russet on Snap Beans Caused by Plectosporiumtabacinum. Plant Disease 89:700-704. Nault, B. A., Shah, D. A., Dillard, H. R., and McFaul, A.C. 2004. Seasonal and spatial dynamics of alate aphid dispersal in snap bean fields in proximity to alfalfa and implications for virus management. Environmental Entomology 33(6):1593-1601. Cobb, A.C., and Dillard, H.R. G.L. 2004. Production of Apothecia and Ascospores of Sclerotinia sclerotiorum. The Plant Health Instructor. DOI: 10.1094/PHI-T-2004-0604-01. Bellinder, R. R., Dillard H. R., and Shah, D. A. 2004. Weed seedbank community responses to crop rotation schemes. Crop Protection 23: 95-101. Dillard, H. R., Bellinder, R. R., and Shah, D. A. 2004. Integrated management of weeds and diseases in a cabbage cropping system. Crop Protection 23: 163-168. Shah, D.A., Dillard, H. R., and Cobb, A. C. 2002. Alternatives to vinclozolin (Ronilan) for controlling gray and white mold on snap bean pods in New York. Plant Health Progress : http://www.plantmanagementnetwork.org/pub/php/research/snapbean/. Wilson, W. J., Dillard, H. R., and Beer, S. V. 1999. Assessment of phenotypic variability in Erwinia stewartii based on metabolic profiles. Plant Disease 83:114-118. Cobb, A. C., and Dillard, H. R. 1998. Thlaspi arvense, a new host for Alternaria brassicicola. Plant Disease 82: 960. Dillard, H. R., and Cobb, A. C. 1998. Survival of Colletotrichum coccodes in infected tomato tissue and in soil. Plant Disease 82: 235-238. Dillard, H. R., Cobb, A. C., and Lamboy, J. S. 1998. Transmission of Alternaria brassicicola to cabbage by flea beetles (Phyllotreta cruciferae). Plant Disease 82: 153-157. Dillard, H. R., and Cobb, A. C. 1997. Disease progress of black dot on tomato roots, and reduction in disease incidence by foliar applied fungicides. Plant Disease 81: 1439-1442. Dillard, H. R., Johnston, S. A., Cobb, A. C., and Hamilton, G. H. 1997. An assessment of fungicide benefits for the control of fungal diseases of processing tomatoes in New York and New Jersey. Plant Disease 81: 677-681. Lamboy, J. S., and Dillard, H. R. 1997. First report of a leaf spot caused by Cladosporium oxysporum on greenhouse tomato. Plant Disease 81: 228. Ntahimpera, N., Dillard, H. R., Cobb, A. C., and Seem, R. C. 1997. Influence of tillage practices on anthracnose development and distribution in dry bean field plots. Plant Disease 81: 71-76. Ntahimpera, N., Dillard, H. R., Cobb, A. C., and Seem, R. C. 1996. Anthracnose development in mixtures of resistant and susceptible dry bean cultivars. Phytopathology 86: 668-673. Dillard, H. R., and Cobb, A. C. 1995. Relationship between leaf injury and colonization of cabbage by Sclerotinia sclerotiorum. Crop Protection 14 (8): 677-682. Dillard, H. R., Ludwig, J. W., and Hunter, J. E. 1995. Conditioning sclerotia of Sclerotinia sclerotiorum for carpogenic germination. Plant Disease 79: 411-415. Dillard, H. R., Cobb, A. C., Garman, W. C. and Brewer, R. 1995. First report of zonate leaf spot on tomato, caused by Cristulariella moricola, in New York. Plant Disease 79: 319. Wilson, W. J., Wiedmann, M., Dillard, H. R., and Batt, C. A. 1994. Identification of Erwinia stewartii by a ligase chain reaction assay. Applied and Environmental Microbiology 60: 278-284. Dillard, H. R., and Cobb, A. C. 1993. Survival of Colletotrichum lindemuthianum in bean debris in New York State. Plant Disease 77: 1233-1238. Dillard, H. R., Wicks, T. J., and Philp, B. 1993. A grower survey of diseases, invertebrate pests and pesticide use on potatoes grown in South Australia. Australian Journal of Experimental Agriculture 33: 653-661. Dillard, H. R., Cobb, A. C., and Call, N. G. 1992. Powdery mildew of carrot in New York. Plant Disease 76: 972. Dillard, H. R., Cobb, A. C., and Bozard, B. T. 1991. Velvetleaf, a new host for Sclerotinia sclerotiorum. Plant Disease 75: 863. Dillard, H. R., and Seem, R. C. 1990. Use of an action threshold for common maize rust to reduce crop loss in sweet corn. Phytopathology 80: 846-849. Dillard, H. R., and Seem, R. C. 1990. Incidence-severity relationships for common maize rust on sweet corn. Phytopathology 80: 842-846. Dillard, H. R. 1989. Effect of temperature, wetness duration, and inoculum density on infection and lesion development of Colletotrichum coccodes on tomato fruit. Phytopathology 79: 1063-1066. Dillard, H. R., and Kline, W. L. 1989. An outbreak of Stewart's bacterial wilt of corn in New York State. Plant Disease 73: 273. Dillard, H. R. 1988. Influence of temperature, pH, osmotic potential and fungicide sensitivity on germination of conidia and growth from sclerotia of Colletotrichum coccodes in vitro. Phytopathology 78: 1357-1361. Dillard, H. R., and Abawi, G. S. 1988. Occurrence of Aphanomyces euteiches f.sp. phaseoli on beans in New York State. Plant Disease 72:912. Dillard, H. R., and Hunter, J. E. 1988. Fungal induced blemishes of sugar snap peas associated with adherence of blossom parts to the pods. HortScience 23(5):847-848. Dillard, H. R. 1987. Characterization of isolates of Rhizoctonia solani from lima beans grown in New York State. Phytopathology 77:748-751. Dillard, H. R., and Hunter, J. E. 1986. Association of common ragweed with Sclerotinia rot of cabbage in New York State. Plant Disease 70:26-28. Dillard, H. R., and Grogan, R. G. 1985. Influence of green manure crops and lettuce on sclerotial populations of Sclerotinia minor. Plant Disease 69:579-582. Dillard, H. R., and Grogan, R. G. 1985. Relationship between sclerotial spatial pattern and density of Sclerotinia minor and the incidence of lettuce drop. Phytopathology 74:90-94. Roberts, H. M., Reisenauer, H. M., and Carlson, R. M. 1980. Determination of ammonium, amides, and soluble carboxylates in plant tissues. J. of Plant Nutrition 2:395-405. Abstracts
- Papers Presented at Professional Meetings Shah, D. A., and Dillard, H. R. 2007. A spatial hierarchy model for the incidence of Sclerotinia sclerotiorum in snap bean. Phytopathology 97: S107. Dillard, H.R. and Cobb, A.C. 2006. Fusarium avenaceum, a new fungal head rot of cabbage in New York. Phytopathology 96:S30. Massey, D. A., Shah, D. A., Dillard, H. R. 2005. Spectrum of virulence in the Puccinia sorghi population. Phytopathology 96:S180. Online Shah, D. A., and Dillard, H.R. 2005. Meta-analysis of yield losses due to common rust in sweet corn. Phytopathology 96:S182. Online Cobb, A.C., and Dillard, H.R. 2005. Effect of Contans on sclerotia populations in the field; inoculum potential of carpogenically germinated sclerotia of Sclerotinia sclerotiorum. 13 th International Sclerotinia Workshop, page 69. Shah, D. A., and Dillard, H. R. 2005. Identifying possible initial inoculum sources for common rust on sweet corn using back trajectory analyses. Phytopathology 95:S172. Dillard, H. R., and Cobb, A. C. 2004. Russet on snap beans, a new disease caused by Plectosporium tabacinum in New York and Maryland. Phytopathology 94:S26. Shah, DA, and Dillard, HR. 2004. Possible sources of Puccinia sorghi inoculum initiating rust epidemics on sweet corn in western New York, 2002. Phytopathology 94:S95. Shah, D. A., Nault, B. A., Dillard, H. R., Mazumdar-Leighton, S., and Gonsalves, D. 2003. Incidence and spatial patterns of viruses in New York snap beans in 2002. Phytopathology 93:S78. http://www.apsnet.org/meetings/2003/abstracts/a03ma571.htm Dillard, H. R., and Cobb, A. C. 2002. Parasitism of sclerotia of Sclerotinia sclerotiorum by Coniothyrium minitans. Phytopathology 92:S105. Dillard, H. R., Lamboy, J.S., and Cobb, A. C. 1998. Association between flea beetle infestations and incidence of Alternaria leaf spot on cabbage. Joint ESA/APS meeting. Phytopathology. Dillard, H. R., Lamboy, J.S., and Cobb, A. C. 1998. Association between flea beetle infestations and incidence of Alternaria leaf spot on cabbage. Joint ESA/APS meeting. Phytopathology. Wilson, W. J., Beer, S. V., and Dillard, H. R. 1996. Phenotypic variability in Pantoea stewartii based on metabolic profiles. Phytopathology 86: S77. Lamboy, J. S., Cobb, A. C., and Dillard, H. R. 1996. Evaluation of Mycostop for prevention of gray mold in a commercial tomato greenhouse production system. Phytopathology 86: S23. Cobb, A.C., and Dillard, H. R. 1996. A reliable method for producing ascospores of Sclerotinia sclerotiorum in vitro. Phytopathology 86: S94. Lamboy, J. S., Cobb, A. C., and Dillard, H. R. 1996. Evaluation of two biocontrol agents for prevention of gray mold in pruning wounds of greenhouse tomatoes. Cornell Community Conference on Biological Control. http://www.nysaes.cornell.edu/ent/bcconf/abstracts2.html#lamboy Evans, T. A., Rouse, R. J., Ringer, C. E., Kantzes, J. G., and Dillard, H. R. 1995. Occurrence of Microdochium blight of squash on the Delmarva Peninsula. Phytopathology 85:1195. Ntahimpera, N., Dillard, H. R., Seem, R. C., and Cobb, A. C. 1995. Efficacy of mixtures of dry bean cultivars in reducing anthracnose development. Phytopathology 85:1127. Johnston, S. A., and Dillard, H. R. 1994. Assessment of fungicide benefits for the control of anthracnose on processing tomatoes in the northeast, 1993. Proceedings of the Second National Integrated Pest Management Symposium/Workshop, page 127. Ntahimpera, N., Dillard, H. R., Cobb, A. C., and Seem, R. C. 1994. Bean anthracnose development in different tillage practices. Phytopathology 84: 1374. Wilson, W. J., Batt, C. A., Dillard, H. R. 1994. Evaluation of a non-isotopic PCR-coupled ligase chain reaction assay for specificity to Erwinia stewartii. Phytopathology 84:1087. Ntahimpera, N., Dillard, H. R., Cobb, A. C., and Seem, R. C. 1994. Development of anthracnose in mixtures of dry bean cultivars. Phytopathology 84:1071. Wilson, W. J., Batt, C. A., Dillard, H. R. 1994. A non-isotopic PCR-coupled LCR reaction assay for the identification of Erwinia stewartii. Phytopathology 84:549. Dillard, H. R., and Cobb, A. C. 1993. Persistence of Colletotrichum coccodes on tomato roots and in soil. Phytopathology 83:1345. Wilson, W. J., Wiedmann, M., Dillard, H. R., and Batt, C. A. 1993. Development of a ligase chain reaction assay for identification of Erwinia stewartii. Abstracts of the 93rd Annual Meeting of the American Society of Microbiology, Q105, page 365. Dillard, H. R. 1990. Factors affecting growth, infection of tomato fruit, and survival of Colletotrichum coccodes. British Society for Plant Pathology Abstracts. Page 47-48. Dillard, H. R. 1990. Survival of Colletotrichum coccodes in New York. Phytopathology 80:1026. Dillard, H. R. 1990. Survival of Colletotrichum lindemuthianum in dry bean debris. Phytopathology 80:118. Dillard, H. R., and Seem, R. C. 1988. Use of incidence-severity relationships for management of common maize rust on sweet corn. Proceedings of 5th International Congress of Plant Pathology. Page 291. Dillard, H. R., and Seem, R. C. 1987. Common maize rust on sweet corn in New York State. Proceedings of the Forty-Second Annual Northeastern Corn Improvement Conference, page 35-38. Dillard, H. R., and Seem, R. C. 1987. Use of incidence-severity relationships to determine the action threshold for common maize rust on sweet corn. Phytopathology 77:1700. Dillard, H. R., and Seem, R. C. 1987. Influence of common maize rust on yield components of processing sweet corn. Phytopathology 77:1748. Dillard, H. R., and Wallis, G. 1986. Rhizoctonia pod and bean rot of baby lima beans in New York State. Phytopathology 76:651. Dillard, H. R., and Hunter, J. E. 1985. Association of common ragweed with Sclerotinia rot of cabbage in New York State. Phytopathology 75:1287. Dillard, H. R., and Grogan, R. G. 1984. Relationship between sclerotial populations of Sclerotinia minor and the incidence of lettuce drop. Phytopathology 74:839. Dillard, H. R., Stowell, L. J., and Grogan, R. G. 1983. Population dynamics of Sclerotinia minor in naturally infested lettuce fields. Phytopathology 73:958. Cobb, A. C., Dillard, H. R., and Strauss, J. 2008. Evaluation of pesticides for control of white and gray mold in snap beans, field RN31, 2007. Plant Disease Management Reports (online) The American Phytopathological Society. St. Paul, MN. In press. Cobb, A. C., Dillard, H. R., and Taras, J. L. 2007. Evaluation of foliar sprays for control of white mold in dry beans, 2006. Plant Disease Management Reports (online) . Report 1:V082. DOI: 10.1094/PDMR01. The American Phytopathological Society, St. Paul, MN. Cobb, A. C., Dillard, H. R., and Amsel, N. A. 2006. Evaluation of foliar sprays for control of white mold in dry beans, 2005. Fungicide and Nematicide Tests (online) Report 61:FC033. DOI: 10.1094/FN61. The American Phytopathological Society. St. Paul, MN. Cobb, A.C., Dillard, H.R., and Amsel, N.A. 2005. Evaluation of foliar sprays for control of white and gray mold in snap beans, 2004. Fungicide and Nematicide Tests (online) Report 60:V079. DOI: 10.1094.FN60. The American Phytopathological Society. St. Paul, MN. Reid, J. E., Dillard, H. R., and Cobb, A. C. 2005. Evaluation of fungicide alternatives for control of Pythium damping-off in greenhouse cucumbers, 2003. Fungicide and Nematicide Tests (online) Report 60:V101. DOI: 10.1094/FN60. The American Phytopathological Society. St. Paul, MN. Cobb, A.C., and Dillard, H.R. 2005. Evaluation of several rates of Endura for control of white and gray mold in snap beans in the mist chamber, 2004. Fungicide and Nematicide Tests (online) Report 60:V061. DOI: 10.1094/FN60. The American Phytopathological Society. St. Paul, MN. Cobb, A. C., Dillard, H. R., Amsel, N. A., Pollicove, S. M., and Witt, E. P. 2004. Evaluation of foliar sprays for control of white and gray mold in snap beans in Geneva, NY, 2003. Fungicide and Nematicide Tests (online) Report 59:V001. DOI: 10.1094/FN59. The American Phytopathological Society. St. Paul, MN. Cobb, A. C., Dillard, H. R., Amsel, N. A., Pollicove, S. M., and Witt, E. P. 2004. Control of white mold on tomatoes with Topsin M in Geneva, NY, 2003. Fungicide and Nematicide Tests (online) Report 59:V0__. DOI: 10.1094/FN59. The American Phytopathological Society. St. Paul, MN. Dillard, H. R., Cobb, A. C., Spratley, T. M., and Witt, E. P. 2003. Control of powdery mildew on tomatoes with Topsin M in Geneva, NY, 2002. Fungicide and Nematicide Tests (online) Report 58:V012. DOI: 10.1094/FN58. The American Phytopathological Society. St. Paul, MN. Dillard, H. R., Cobb, A. C., Amsel, N. A., Spratley, T. M., and Witt, E. P. 2003. Evaluation of foliar sprays for control of white and gray mold in snap beans in Geneva, NY, 2002. Fungicide and Nematicide Tests (online) Report 58 V013. DOI: 10.1094/FN58. The American Phytopathological Society. St. Paul, MN. Dillard, H.R., Cobb, A.C., Bartron, K.T., Fahrenholz, P.D., Henry, K.A., Witt, E.P. 2002. Evaluation of fungicides for control of common rust in sweet corn, 2001. Fungicide and Nematicide Tests 57: V029. Dillard, H.R., Cobb, A.C., Bartron, K.T., Fahrenholz, P.D., Henry, K.A., Witt, E.P. 2002. Evaluation of fungicides for control of alternaria leaf spot in cabbage, 2001. Fungicide and Nematicide Tests 57: V014. Dillard, H.R., Cobb, A.C., Bartron, K.T., Fahrenholz, P.D., Henry, K.A., Witt, E.P. 2002. Evaluation of foliar sprays for control of white and gray mold in snap beans, field crittenden, 2001. Fungicide and Nematicide Tests 57: V006. Dillard, H.R., Cobb, A.C., Bartron, K.T., Fahrenholz, P.D., Henry, K.A., Witt, E.P. 2002. Evaluation of foliar sprays for control of white and gray mold in snap beans, field 48, 2001. Fungicide and Nematicide Tests 57: V005. Dillard, H.R., Cobb, A.C., Bartron, K.T., Fahrenholz, P.D., Henry, K.A., Witt, E.P. 2002. Control of sclerotia of Sclerotinia sclerotiorum with Contans, 2001. Biological and Cultural Tests 17: V04. Dillard, H.R., Cobb, A.C., McCormick, K.E., Straight, G.A., Walker, S.J., Burr, A.T. 2001. Evaluation of materials for control of black rot in cabbage, 2000. Fungicide and Nematicide Tests. http://www.scisoc.org/online/fntests/searchall/abstracts/v02.htm Dillard, H.R., Cobb, A.C., McCormick, K.E., Straight, G.A., Walker, S.J., Burr, A.T. 2001. Evaluation of fungicides for control of common rust in sweet corn, 2000. Fungicide and Nematicide Tests. http://www.scisoc.org/online/fntests/searchall/abstracts/v96.htm Dillard, H.R., Cobb, A.C., McCormick, K.E., Straight, G.A., Walker, S.J., Burr, A.T. 2001. Evaluation of foliar sprays for control of white and gray mold in snap beans, field Crittenden, 2000. Fungicide and Nematicide Tests. http://www.scisoc.org/online/fntests/searchall/abstracts/v80.htm Dillard, H.R., Cobb, A.C., McCormick, K.E., Straight, G.A., Walker, S.J., Burr, A.T. 2001. Evaluation of foliar sprays for control of white and gray mold in snap beans, field 49, 2000. Fungicide and Nematicide Tests. http://www.scisoc.org/online/fntests/searchall/abstracts/v81.htm Dillard, H.R., Cobb, A.C., McCormick, K.E., Straight, G.A., Walker, S.J., Burr, A.T. 2001. Evaluation of fungicides for control of Alternaria leaf spot in cabbage, 2000. Fungicide and Nematicide Tests. http://www.scisoc.org/online/fntests/searchall/abstracts/v01.htm Dillard, H., Cobb, A., McCormick, K., Alicandro, R., Straight, G., and Walker, S., 2000. Evaluation of fungicides for control of common rust, 1999. Fungicide and Nematicide Tests 55: 159. Dillard, H., Cobb, A., McCormick, K., Straight, G., and Walker, S., 2000. Evaluation of foliar sprays for control of white and gray mold in snap beans, field 48, 1999. Fungicide and Nematicide Tests 55: 145. Dillard, H., Cobb, A., McCormick, J., Alicandro, R., Straight, G., and Walker, S., 2000. Evaluation of foliar sprays for control of white and gray mold in snap beans, field crittenden, 1999. Fungicide and Nematicide Tests 55: 143. Dillard, H., Cobb, A., McCormick, K., Belding, J., Dougherty, J., and Walker, S., 2000. Evaluation of fungicides for control of common rust, 1998. Fungicide and Nematicide Tests 55: 160. Dillard, H., Cobb, A., McCormick, K., Belding, J., Dougherty, J., and Walker, S., 2000. Evaluation of foliar sprays for control of white and gray mold in snap beans, field 48, 1998. Fungicide and Nematicide Tests 55: 144. Dillard, H., Cobb, A., McCormick, K., Belding, J., Dougherty, J., and Walker, S., 2000. Evaluation of fungicides for control of white and gray mold in snap beans, field crittenden, 1998. Fungicide and Nematicide Tests 55: 142. Cobb, A., Dillard, H., McCormick, K., Hoffman, D., Seem, J., Jordan, L., Lamboy, J. 1999. Evaluation of fungicides for control of common rust, 1997. Fungicide and Nematicide Tests 54:136. Cobb, A., Dillard, H., Hoffman, D., McCormick, K., Seem, J. 1999. Evaluation of fungicides for control of Alternaria leaf spot, 1997. Fungicide and Nematicide Tests 54:128. Dillard, H., Cobb, A., McCormick, K., Hoffman, D., Seem, J., and Ntahimpera, N. 1996. Reaction of cabbage cultivars to Alternaria leaf spot, 1995. Biological and Cultural Tests 11: 99. Dillard, H., Cobb, A., Hoffman, D., McCormick, K., Ntahimpera, N., Seem, J. 1996. Evaluation of fungicides for control of foliar and fruit diseases of fresh market tomatoes grown on bare ground or straw mulch, 1995. Fungicide and Nematicide Tests 51: 155. Cobb, A., Dillard, H., Hoffman, D., McCormick, K., Ntahimpera, N., and Seem, J. 1996. Response of pepper cultivars to bacterial spot, 1995. Biological and Cultural Tests 11: 113. Dillard, H. R., Cobb, A. C., Cobb, D. J., Ingram, J. T., McCormick, K. E. 1995. Comparison of organic and cultural practice management strategies for control of foliar and fruit pathogens of tomato, 1994. Biological and Cultural Tests 10: 100. Dillard, H. R., Cobb, A. C., Cobb, D. J., Ingram, J. T., McCormick, K. E. 1995. Comparison of fungicides for control of white and gray molds on snap beans, 1994. Fungicide and Nematicide Tests 50: 95. Dillard, H. R., Cobb, A. C., Brink, D. C., and Jensen, K. C. 1994. Evaluation of fungicides for control of pod molds on snap beans, 1993. Fungicide and Nematicide Tests 49:94. Dillard, H. R., Cobb, A. C., and Brink, D. C. 1993. Evaluation of bactericides for control of bacterial speck and spot on processing tomatoes, 1992. Fungicide and Nematicide Tests 48:188. Dillard, H. R., Cobb, A. C., and Brink, D. C. 1993. Evaluation of fungicides for control of early blight and anthracnose, 1992. Fungicide and Nematicide Tests 48:189. Dillard, H. R., Cobb, A. C., Ludwig, J. W., and Pedersen, L. H. 1993. Evaluation of preharvest Rovral applications for control of white and gray molds on storage cabbage, 1991-1992. Fungicide and Nematicide Tests 48:104. Dillard, H. R., Cobb, A. C., and Brink, D. C. 1993. Evaluation of fungicides for control of white and gray molds on snap beans, 1992. Fungicide and Nematicide Tests 48:99. Dillard, H. R., and Cobb, A. C. 1992. Control of bacterial speck and spot on processing tomato, 1991. Fungicide and Nematicide Tests 47:141. Dillard, H. R., and Ludwig, J. W. 1992. Evaluation of fungicides for control of pod molds of snap beans, 1991. Fungicide and Nematicide Tests 47:77. Dillard, H. R., and Seem, R. C. 1991. Chemical control of common rust on sweet corn, 1989. Fungicide and Nematicide Tests 46:170. Dillard, H. R., Moore, C. J., and Cobb, A. C. 1991. Evaluation of bactericides for control of bacterial speck and spot on tomato, 1990. Fungicide and Nematicide Tests 46:175. Dillard, H. R., Cobb, A. C., Moore, C. J., and Kline, S. T. 1991. Evaluation of fungicides for control of anthracnose and early blight on processing tomatoes, 1990. Fungicide and Nematicide Tests 46:176. Dillard, H. R., Cobb, A. C., and Moore, C. J. 1991. Response of cabbage cultivars to black rot, 1990. Biological and Cultural Tests 6: 7. Dillard, H. R., Cobb, A. C., and Kline, S. T. 1991. Evaluation of Rovral applications on storage cabbage for control of white and gray mold, 1989-1990. Fungicide and Nematicide Tests 46:116. Dillard, H. R., and Cobb, A. C. 1990. Evaluation of black rot severity on 47 cabbage cultivars, 1989. Biological and Cultural Tests 5: 14. Dillard, H. R. 1990. Overwintering of Colletotrichum lindemuthianum in dry bean debris in New York State. Annual Report of the Bean Improvement Cooperative. Volume 33:53-54. Dillard, H. R., and Cobb, A. C. 1989. Reaction of cabbage cultivars to black rot, 1988. Biological and Cultural Tests 4:12. Dillard, H. R. 1988. Reaction of sauerkraut and storage cabbage cultivars to black rot, 1987. Biological and Cultural Tests 3:14. Dillard, H. R. 1988. Evaluation of fungicides for control of anthracnose and early blight on tomatoes, 1987. Fungicide and Nematicide Tests 43:149. Dillard, H. R. 1988. Chemical control of anthracnose and early blight on processing tomatoes, 1986. Fungicide and Nematicide Tests 43:150. Dillard, H. R. 1987. Control of Cercospora leaf spot on table beets, 1986. Fungicide and Nematicide Tests 42:59. Dillard, H. R. 1986. Control of fungal and bacterial diseases of processing tomatoes with foliar sprays, 1985. Fungicide and Nematicide Tests 41:64. Dillard, H. R., and Abawi, G. S. 1986. Field evaluation of selected fungicides for control of pea root rot, 1985. Fungicide and Nematicide Tests 41:133. Dillard, H. R., and Rutkowski, E. W. 1985. Control of anthracnose and early blight of tomato, 1984. Fungicide and Nematicide Tests 40:84. Dillard, H. R., and Becker, R. F. 1985. Evaluation of aerial fungicide applications for control of corn rust, 1984. Fungicide and Nematicide Tests 40:71. Book Chapters Dillard, H. R. 1992. Colletotrichum coccodes : the pathogen and
its hosts. In: Bailey, J. A. and Jeger, M. J. (eds), Colletotrichum:
Biology, Pathology and Control. CAB International, Wallingford,
UK. Chapter 11, page 225-236. Extension Publications Web site:
Video: Newsletter articles:
Fact sheets: Dillard, H. R., Cole, D., Hedges, T., Turner, A., Utete, D., Mvere, B., Gubba, A., Wilkinson, P. 1995. Late Blight of Tomatoes and Potatoes. Zimbabwe Horticultural Crops Pest Management. Fact Sheet, June 1995. Dillard, H. R., Cole, D., Hedges, T., Turner, A., Utete, D., Mvere, B., Gubba, A., Wilkinson, P. 1995. Early Blight of Tomatoes. Zimbabwe Horticultural Crops Pest Management. Fact Sheet, June 1995. Dillard, H. R., Cole, D., Hedges, T., Turner, A., Utete, D., Mvere, B., Gubba, A., Wilkinson, P. 1995. Bacterial Diseases of Tomatoes. Zimbabwe Horticultural Crops Pest Management. Fact Sheet, June 1995. Dillard, Helene R., and Legard, Daniel E. 1991. Bacterial diseases of beans. Cornell Cooperative Extension Fact Sheet, Diseases of Beans, page 729.50. Dillard, Helene R. 1988. Carrot leaf blight. Cornell Cooperative Extension Fact Sheet, Diseases of Carrot, page 739.00. Dillard, Helene R. 1988. Bean anthracnose. Cornell Cooperative Extension Fact Sheet, Diseases of Dry Bean, page 729.40. Dillard, Helene R., and Zitter, Thomas A. 1987. Common rust of sweet corn. Cornell Cooperative Extension Fact Sheet, Diseases of Sweet Corn, page 727.40. Dillard, Helene R. 1987. Tomato anthracnose. Cornell Cooperative Extension Fact Sheet, Diseases of Tomato, page 735.70. Dillard, Helene R. 1987. Sclerotinia rot of cabbage. Cornell Cooperative Extension Fact Sheet, Diseases of Crucifers, page 730.30. Proceedings of extension conferences: Cobb, A.C., and Dillard, H.R. 2008. Continuing the Search for Mold and Spot Control After Ronilan. 2008 Mid-Atlantic Fruit and Vegetable Convention, Proceedings for the Vegetable, Potato, Flower, Small Fruit, and General Session. Pages 75-78. Dillard, H.R., and Cobb, A.C. 2008. Snap bean quality spoilers: white mold, gray mold, and spots. 2008 Empire State Fruit and Vegetable Expo and Becker Forum Proceedings, pages 148-150. Dillard, Helene R., and Cobb, Ann C., 2007. Unraveling the Mystery of Bean Pod Blemishes. 2007 Empire State Fruit & Vegetable Expo and Becker Forum Proceedings, pages 180-181. Cobb, Ann C. and Dillard, Helene R., 2006. Mold Control, What's Hot, What's Not. 2006 Empire State Fruit & Vegetable Expo and Becker Forum Proceedings, pages 70-73. Reid, J., Dillard, H., Cobb, A., Hoover, H. 2005. Comparing greenhouse tomatoes in a New York high tunnel. Proceedings of the 32 nd National Agricultural Plastics Congress, page 118 to 122. Dillard, H.R. 2005. National Pest Alert – Soybean Rust on Snap and Dry Beans. Proceedings of the 2005 Empire State Fruit and Vegetable Expo and Produce marketing Conference, pages 67-69. Dillard, H.R., and Cobb, A.C. 2005. Got Mold? And No Ronilan?…Disease Updates. Proceedings of the 2005 Empire State Fruit and Vegetable Expo and Produce marketing Conference, pages 64-66. Cobb, Ann and Helene Dillard, 2004. Disease Control Update. 2004 Mid-Atlantic Fruit and Vegetable Convention, Proceedings for the Vegetable, Potato, Flower, Small Fruit, and General Session, vol. 1, pages 42-44. Nault, Brian A., Shah, Denis, Dillard, Helene, Mazumdar-Leighton, Sue, Gonsalves, Denis, and McFaul, Arlie, 2003. Seasonal patterns of aphid movement and virus incidence in snap bean fields. 2003 Proceedings of the New York State Vegetable Conference, pages 84-87. Cobb, Ann and Dillard, Helene, 2003. Rots and spots on cabbage heads. 2003 Proceedings of the New York State Vegetable Conference, pages 23-25. Nault, Brian A., Shah, Denis, Dillard, Helene, Mazumdar-Leighton, Sue, Gonsalves, Dennis, and McFaul, Arlie, 2003. Aphid dispersal and virus incidence in snap bean fields. 2003 Mid-Atlantic Fruit and Vegetable Convention, Proceedings for the Vegetable, Potato, Flower, Small Fruit, and General Session, vol. 1, pages 39-41. Dillard, H. R. 2002. Snap bean fungicide updates and trial results for 2001. 2002 New York State Vegetable Conference Proceedings, 160-163. Dillard, H. R. 2002. Disease control strategies for snap beans – Trial results for 2001. 2002 Mid-Atlantic Fruit and Vegetable Conference Proceedings, 27-28. Dillard, H. R. 2001. Controlling rust in 2001. 2001 New York State Vegetable Conference Proceedings, 92-94. Dillard, H. R. 2001. Black rot, Alternaria leaf spot, and a pile of chemicals…the search continues. 2001 New York State Vegetable Conference Proceedings, 58-61. Dillard, H. R. 2001. Rots, rust, and russet. 2001 New York State Vegetable Conference Proceedings, 41-44. Dillard, H. R. 2000. Managing bacterial diseases of tomatoes and peppers. 2000 New York State Vegetable Conference Proceedings, 177-180. Dillard, H. R. 2000. So many diseases, so few tools. 2000 New York State Vegetable Conference Proceedings, 66-69. Dillard, H. R. 2000. Pod rots: what’s in the crystal ball for control. 2000 New York State Vegetable Conference Proceedings, 27-29. Dillard, H. R. 1997. Bacterial diseases of tomatoes and peppers, and an update on fungicides for late blight control. 1997 New York State Vegetable Conference Proceedings, 191-192. Dillard, H. R. 1997. Sweet corn diseases: identification and control. 1997 New York State Vegetable Conference Proceedings, 89-92. Dillard, H. R. 1997. Strategies for minimizing black rot and Alternaria leaf spot on cabbage. 1997 New York State Vegetable Conference Proceedings, 59-60. Dillard, H. R. 1997. Mold Management Madness: Ronilan and the Alternatives. 1997 New York State Vegetable Conference Proceedings, 37-38. Dillard, H. R. 1997. Recognizing and Managing Diseases: "hands-on" session. Proceedings of the 1997 Ontario-New York International Cabbage Workshop, page 9-17. Ntahimpera, N., Dillard, H. R., and Cobb, A. C. 1996. Sweet corn ear rot caused by Fusarium species. 1995 New York State Vegetable Project Reports Relating to IPM, page 152-153. NYS IPM Publication #120. Dillard, H. R. 1996. Alternaria Leaf Spot of Cabbage: from concentric circles to complete carnage. 1996 New York State Vegetable Conference Proceedings, page C5-C8. Dillard, H. R. 1996. Disease Control in Snap Beans and Peas. 1996 Pennsylvania Vegetable Conference Proceedings, page 12-13. Dillard, H. R. 1995. Hold the Mold! Problems with ronilan resistant gray mold. 1995 New York State Vegetable Conference Proceedings, page 71-72. Dillard, H. R. 1995. Biology and control of Alternaria diseases of crucifers. 1995 New York State Vegetable Conference Proceedings, page 8. Dillard, H. R. 1994. Pod mold control on snap beans. 1994 New York State Vegetable Conference Proceedings, page 181-182. Dillard, H. R. 1994. Management strategies for Fusarium yellows and black rot. 1994 New York State Vegetable Conference Proceedings, page 52-53. Dillard, H. R. 1994. What's wrong with my tomatoes? 1994 New York State Vegetable Conference Proceedings, page 26-28. Dillard, H. R. 1993. The Ronilan Section 18. 1993 New York State Vegetable Conference Proceedings, page 114-116. Dillard, H. R. 1993. Tomato anthracnose research update. 1993 New York State Vegetable Conference Proceedings, page 46-47. Dillard, H. R. 1993. The blights of 1992: early, late and bacterial. 1993 New York State Vegetable Conference Proceedings, page 43-45. Dillard, H. R. 1993. Current disease problems in snap bean and pea. 1993 Pennsylvania Vegetable Conference Proceedings, page 14-17. Dillard, H. R. 1993. Disease management for tomato and pepper. 1993 Pennsylvania Vegetable Conference Proceedings, page 6-9. Dillard, H. R. 1991. Evaluation of cabbage varieties for black rot resistance: A summary of trials conducted from 1987-1990. New York State Vegetable Conference Proceedings, page 75-78. Dillard, H. R. 1991. Copper vs. black rot - who won? New York State Vegetable Conference Proceedings, page 74. Dillard, H. R. 1991. Controlling white and gray mold. New York State Vegetable Conference Proceedings, page 1-2. Dillard, H. R. 1990. Ascochyta foot rot of peas. New York State Vegetable Conference Proceedings, page 39-40. Dillard, H. R. 1990. Evaluation of 47 cabbage varieties for black rot resistance. New York State Vegetable Conference Proceedings, page 11-12. Dillard, H. R., and Seem, R. C. 1989. Evaluation of a sampling procedure and an action threshold for common rust on sweet corn. Reports from IPM Research, Development and Implementation Vegetable Projects in New York State, 1989. Page 47-50. Dillard, H. R. 1989. Black rot in cabbage - 1988 Variety Trial Results. New York State Vegetable Conference Proceedings, page 62-63. Dillard, H. R. 1989. What we know about tomato anthracnose. New York State Vegetable Conference Proceedings, page 52-53. Dillard, H. R. 1989. Stewart's bacterial wilt of corn. New York State Vegetable Conference Proceedings, page 33-34. Dillard, H. R. 1989. Tomato and snap bean disease control. Pennsylvania Vegetable Growers Association Conference Proceedings, page 8-10. Dillard, H. R. 1988. Understanding white mold and black rot of cabbage. Proceedings of the 1987 Sauerkraut Seminar. New York State Agricultural Experiment Station Special Report, December 1987. Number 61:8-10. Dillard, H. R. 1988. Review of sweet corn diseases. New York State Processing Vegetable Conference Proceedings, page 1-3. Dillard, H. R. 1988. Development of a monitoring method and an action threshold for common rust on sweet corn. New York State Integrated Pest Management; abstracts of 1987 projects. Page V:15-16. Dillard, H. R. 1988. 1987 Cabbage disease research: black rot, Pythium damping-off, and white mold. Proceedings of the Upstate New York Cabbage Meeting 1:1-4. Dillard, H. R. 1987. Development of integrated pest management strategies for common rust of sweet corn. New York State Integrated Pest Management; abstracts of 1986 projects. Page 24. Dillard, H. R. 1987. Cercospora leaf spot. New York State Processing Vegetable Conference Proceedings, page 72-74. Dillard, H. R. 1987. Fusarium wilt of peas - an unusual occurrence. New York State Processing Vegetable Conference Proceedings, page 56-57. Dillard, H. R. 1987. Common rust of sweet corn: 1986 research results. New York State Processing Vegetable Conference Proceedings, page 33-35. Dillard, H. R. 1986. Brown bean disease of lima beans. New York State Processing Vegetable Conference Proceedings, page 82-83. Dillard, H. R. 1986. Beet root rot problems of 1985. New York State Processing Vegetable Conference Proceedings, page 72. Dillard, H. R. 1986. Common rust of sweet corn. New York State Processing Vegetable Conference Proceedings, page 49-50. Dillard, H. R. 1986. Ascochyta blight. New York State Processing Vegetable Conference Proceedings, page 38-39. Dillard, H. R. 1985. Carrot leaf blight - symptoms and control. New York State Processing Vegetable Conference Proceedings, page 82. Dillard, H. R. 1985. White mold infection studies - cabbage. New York State Processing Vegetable Conference Proceedings, page 61-62. Dillard, H. R. 1985. Common rust and common smut of corn. New York State Processing Vegetable Conference Proceedings, page 52-54. Cobb, A. C., and Dillard, H. R. 2004. Snap Bean Disease Control. American Vegetable Grower 52(4) April, page 22. Dillard, H. R. 2001. Pest of the Month: Cabbage Black Rot. American Vegetable Grower, February 2001, page 9. Dillard, H. R. 2000. Managing Bacterial Diseases of Tomatoes and Peppers. The Tomato Magazine. June 2000: 16-17. Dillard, H. R. 1997. Rot Stopping Remedies for Common Diseases of Sweet Corn and Beans. The Natural Farmer 2(33): 10-11. Cobb, A. C., and Dillard, H. R. 1996. To Mulch or Not to Mulch? The Tomato Club 4(3): 7-8. Dillard, H. R., Cole, D. L., Hedges, T., Turner, A. D, Utete, D., Mvere, B., Gubba, A., Wilkinson, P. 1994. Four of the most serious diseases in Zimbabwe. Farming World, November 1994 pages 11-15. Dillard, H. R. 1988. Bean Anthracnose: An old disease with unanswered questions. The Bean Commission Journal 12 (2):6-7, May 1988.
Regulatory - special exemptions - Section 18, 2(ee):
Dillard, H. R., and Robinson, G. 2000. Section 18 Emergency Use of Gaucho Insecticide for the Treatment of Sweet Corn Seed Grown in Idaho. November 1999. (prepared for Stewart’s bacterial wilt / corn flea beetle management) Dillard, H. R. 1996. 1997 Section 18 emergency exemption application: A specific exemption is requested for use of Ronilan (vinclozolin) to control white mold (Sclerotinia sclerotiorum) and gray mold (Botrytis cinerea) on snap beans in New York State. October, 1996. Dillard, H. R. 1995. 1996 Section 18 emergency exemption application: A specific exemption is requested for use of Ronilan (vinclozolin) to control white mold (Sclerotinia sclerotiorum) and gray mold (Botrytis cinerea) on snap beans in New York State. November, 1995. Dillard, H. R. 1994. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) and white mold (Sclerotinia sclerotiorum) in 1995. November, 1994. Dillard, H. R. 1994. Request for DEC approval of FIFRA 2 (ee) recommendation for use of thiophanate-methyl and iprodione at lower than labeled rates for control of white mold (Sclerotinia sclerotiorum) and gray mold (Botrytis cinerea) on snapbeans in 1994. February, 1994. Dillard, H. R. 1993. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) and white mold (Sclerotinia sclerotiorum) in 1994. November, 1993. Dillard, H. R. 1993. Request for DEC approval of FIFRA 2 (ee) recommendation for use of maneb in combination with copper compounds on peppers to control bacterial leaf spot (Xanthomonas campestris pv. vesicatoria). April, 1993. Dillard, H. R. 1992. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) and white mold (Sclerotinia sclerotiorum) in 1993. November, 1992. Dillard, H. R. 1991. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) in 1992. October, 1991. Dillard, H. R. 1991. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) in 1991. January, 1991. Dillard, H. R. 1990. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) in 1990. January, 1990. Dillard, H. R. 1989. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) in 1989. January, 1989. Dillard, H. R. 1988. Emergency request for use of iprodione (Rovral) on cabbage for the control of white mold (Sclerotinia sclerotiorum) in 1988. March, 1988. Dillard, H. R. 1988. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) in 1988. January, 1988. Dillard, H. R. 1987. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) in 1987. January, 1987. Dillard, H. R. 1986. Emergency request for use of vinclozolin (Ronilan) on snap beans for the control of gray mold (Botrytis cinerea) in 1986. January, 1986.
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New York State Agricultural
Experiment Station, 630 West North Street, Geneva, New York 14456
Telephone: 315.787.2011
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