Plant Pathology Faculty

Nicholas Dufault

Nicholas Dufault - UF Plant Pathology
  • Ph.D. Plant Pathology, The Pennsylvania State University, 2008
  • M.S. Plant Pathology, The Pennsylvania State University, 2004
  • B.A. Biology, Saint John's University, 2001
  • Curriculum Vitae


  • Epidemiology and Aerobiology
  • Diseases of Vegetables and Agronomic Crops
  • Development of integrated crop management programs


My academic interests are in plant disease epidemiology and aerobiology. The focus of my research and extension program is to improve the management of crop diseases affecting both vegetable and agronomic crop production systems in Florida. It is my goal to use various statistical, weather and educational tools to develop efficient plant disease management programs that will maximize disease control and reduced costly inputs (i.e. chemicals, water, and time). My extension educational programs are aimed at increasing the plant pathology expertise of agricultural service personnel, educators, crop advisors and producers. I am working closely with horticulturalists, agronomists and other plant scientists to evaluate cultural, biological and chemical disease control strategies as a component of integrated pest management primarily for potatoes, watermelons and peanuts.

Currently, my research is focused on the integrated management of peanuts using traditional and novel techniques, and on examining the spread of fungal pathogens in watermelons. I also have projects examining pesticide use in potatoes, watermelons, cabbage and peanuts.


Kris Beckham, Sr. Biological Scientist, Phone: (352)273-4619; Email:
Kshitij Khatri, Graduate Student, Fifield 1441.


  • Cevallos-Cevallos, J. M., Gu, G., Danyluk, M.D., Dufault, N.S., van Bruggen, A. H. 2012. Salmonella can reach tomato fruits on plants exposed to aerosols formed by rain. International Journal of Food Microbiology. 158(2) 140-146.
  • Chamecki, M., Dufault, N.S. and Isard, S. A. 2012. Atmospheric dispersion of wheat rust spores: a new theoretical framework to interpret field data and estimate downwind dispersion. Journal of Applied Meteorology and Climatology. 51(3) 672-685.
  • Chamecki, M., Gleicher, S. C., Dufault, N. S. and Isard, S. A. 2011. Diurnal variation in settling velocity of pollen released from maize and consequences for atmospheric dispersion and cross-pollination. Agricultural and Forest Meteorology. 151(8) 1055-1065.
  • Dufault, N. S., Isard, S. A., Marois, J. J. and Wright, D. L. 2010. Removal of wet deposited Phakopsora pachyrhizi urediniospores from soybean leaves by subsequent rainfall. Plant Disease. 94:1336-1340.
  • Dufault, N. S., Isard, S. A., Marois, J. J. and Wright, D. L. The influence of rainfall intensity and soybean plant row spacing on the vertical distribution of wet deposited Phakopsora pachyrhizi urediniospores. Canadian Journal of Plant Pathology. 32(2) 162-169. doi:10.1080/07060661.2010.484205
  • Dufault, N. S. and Isard, S. A. 2010. A portable rainfall simulator for evaluating the wet deposition of plant pathogens. Applied Engineering in Agriculture. 26(1) 71-78.
  • Isard, S. A., Dufault, N. S., Miles, M. R., Hartman, G. L., Russo, J. M., De Wolf, E. D., and Morel, W. 2006. The effect of solar irradiance on the mortality of Phakopsora pachyrhizi urediniospores. Plant Dis. 90(7):941-945.
  • Dufault, N. S., De Wolf, E. D., Lipps, P. E., and Madden, L. V. 2006. Role of temperature and moisture in the production and maturation of Gibberella zeae perithecia. Plant Dis. 90(5):637-644.
  • Tesfaye, M., Dufault, N. S., Dornbusch, M. R., Allan, D. L., Vance, C. P., and Samac, D. A. 2003. Influence of enhanced malate dehydrogenase expression by alfalfa on diversity of rhizobacteria and soil nutrient availability. Soil Biol. Biochem. 35(8):1103-1113.