302 Life Sciences Bldg.
Baton Rouge, LA 70803
Phone: (225) 578-1464
Fax: (225) 578-1415
B.A. in History, Hendrix College, Conway AR - 1974
M.S. in Plant Pathology, University of Arkansas - 1978
Ph.D. in Plant Pathology, University of California at Davis - 1983
Pathogens and diseases affecting sugarcane, all aspects of disease management, conventional and molecular selection for host plant resistance, Pythium, and changes in soil microbial communities associated with sugarcane monoculture. Cooperative extension effort (25%) for sugarcane pathology educational programs.
Project LAB94071 Biology and Management of Sugarcane Diseases (01/01/2016 – 12/31/2019)
I have a commodity-based pathology research program and enjoy conducting applied and basic research on a variety of pathogens and diseases affecting sugarcane. The disease problems affecting sugarcane in Louisiana have dictated my research program priorities. Sugarcane is an important commodity in Louisiana with an estimated economic impact of $2.7 billion. It is produced on approximately 420,000 acres by 475 mostly "Cajun" family farming operations. Sugarcane has been commercially cultivated in south Louisiana for more than 200 years. It is a great pleasure to conduct pathology research in support of this important, traditional industry.
PLHL 7083 - Epidemiology and Crop Loss Assessment, 3 hour lecture course.
This course introduces graduate students to basic concepts of interactions between pathogen and host populations and the environment, the description and prediction of disease increase in time and space, implications for disease management, and techniques to assess losses to plant diseases.
Gutierrez, A., Garces, F.F., and Hoy, J.W. 2016. Evaluation of resistance to leaf scald by quantitative PCR of Xanthomonas albilineans in sugarcane. Plant Dis. 100:1331-1338.
Hoy, J.W., Baisakh, N., Avellaneda, M.C., Kimbeng, C.A., and Hale, A.H. 2016. Detection, breeding, and selection of durable resistance to brown rust in sugarcane. Proc. Int. Soc. Sugar Cane Technol. 29:1034-1039.
Hoy, J.W., Avellaneda, M.C., and Bombecini, J. 2014. Variability in Puccinia melanocephala pathogenicity and resistance in sugarcane cultivars. Plant Dis. 98:1728-1732.
Barrera, W.A., Hoy, J.W., and Li, B. 2013. Effects of temperature and moisture variables on brown rust epidemics in sugarcane. J. Phytopathol. 161:98-106.
Hoy, J.W., Savario, C.F., Arceneaux, A.E., and Barrera, W.A. 2011. Effects of cultivar and environmental conditions on billet planting tolerance. J. Amer. Soc. Sugar Cane Technol. 31:1-14.
Savario, C.F., and Hoy, J.W. 2011. Microbial communities in sugarcane soils with and without a sugarcane cropping history. Plant and Soil 341:63-73.
Hoy, J.W., and Hollier, C.A. 2009. Effect of brown rust on yield of sugarcane in Louisiana. Plant Dis. 93:1171-1174.
McAllister, C.D., Hoy, J.W., and Reagan, T.E. 2008. Temporal increase and spatial distribution of sugarcane yellow leaf and infestations of the aphid vector, Melanaphis sacchari. Plant Dis. 91:607-615.
Hoy, J. W., and Grisham, M. P. 2006. Effects of harvester type, inoculum source, and cultivar on spread of ratoon stunting disease. Sugar Cane International 24(3):3-6,13.
Daugrois, J. H., Hoy, J. W., and Griffin, J. L. 2005. Protoporphyrinogen oxidase inhibitor herbicide effects on Pythium root rot of sugarcane, Pythium species, and the soil microbial community. Phytopathology 95:220-226.
Bond, J. P., McGawley, E. C., and Hoy, J. W. 2004. Sugarcane growth as influenced by nematodes and Pythium arrhenomanes. Nematropica 34:245-256.
Hoy, J. W., Richard, C. A., Jackson, W. R., and Waguespack, H. L., Jr. 2004. Effects of cultivars, fungicides, and fertilization at planting on yields obtained from whole stalk and billet planting in Louisiana. J. Amer. Soc. Sugar Cane Technol. 24:70-80.
Hoy, J. W., Bischoff, K. P., Milligan, S. B., and Gravois, K. A. 2003. Effect of tissue culture explant source on sugarcane yield components. Euphytica 129:237-240.
Hoy, J. W., and Flynn, J. L. 2001. Control of ratoon stunting disease of sugarcane in Louisiana with seedcane produced through micropropagation and resistant cultivars. Proc. Int. Soc. Sugar Cane Technol. 24:417-421.
Dissanayake, N., and Hoy, J. W. 1999. Organic material soil amendment effects on root rot and sugarcane growth and characterization of the materials. Plant Disease 83:1039-1046.
Yin, Z., Hoy, J. W., and Milligan, S. B. 1996. Evaluation and heritability of resistance to sugarcane red rot. Phytopathology 86:662-667.
Hoy, J. W., and Grisham, M. P. 1994. Sugarcane leaf scald distribution, symptomatology, and effect on yield in Louisiana. Plant Disease 78:1083-1087.
Chen, W., Hoy, J. W., and Schneider, R. W. 1992. Species-specific polymorphisms in transcribed ribosomal DNA of five Pythium species. Exp. Mycol. 16:22-34.