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Education

• B.S.- Pennsylvania State University (Plant  Science)
• M.S.- University of California, Berkeley (Plant Pathology)
• Ph.D.- University of California-Berkeley (Plant Pathology)

Courses Taught

• Plant Pathogenic Fungi (PLPA5503)
• Diseases of Economic Crops (Team taught)

Research Emphasis

My interests are in applied and basic research in plant pathology. My basic research efforts are on the genetics and population biology of plant pathogenic fungi. Pathogens of interest include Pyricularia, Colletotrichum, Fusarium, and Verticillium species, powdery mildew pathogens, Peronospora farinosa f. sp. spinaciae, and Albugo occidentalis. My laboratory uses genetic (vegetative compatibility) and molecular tools (DNA fingerprinting and gene sequencing) to characterize the inter- and intraspecific phylogenetic relationships among economically important plant pathogens. We also examined the relationship between genotype and virulence and the evolution of virulence in plant pathogenic fungi. This information has been used in screening procedures to breed for disease resistance. In addition, we are developing molecular markers in spinach with a focus on markers linked to downy mildew disease resistance genes as an effort to incorporate marker assisted selection to incorporate economically important traits into spinach.
My applied interests have focused on managing diseases of various crops particularly vegetable crops and rice using Integrated Management Practices. My efforts have focused on the numerous disease management practices including resistance, cultural practices, and chemical and non-chemical methods of disease control. Crops which I have had considerable experience with include numerous vegetables (particularly spinach, tomato, and cucurbits), fruit (apple, peach, mango, kiwi, strawberry), and rice.
I have also been involved in a wide range of international collaborative projects on rice and vegetable diseases, integrated pest management, and the population biology of plant pathogenic fungi; the foreign assignments have been located in India, Nepal, Bangladesh, Thailand, Bolivia, Nigeria, Egypt, and the Philippines. Most of these collaborative efforts have been funded by USDA, USAID, and Winrock International.

Honors and Awards

• The Presidents’ Silver Volunteer Service Award, President’s Council on Service and Civic Participation,  USA Freedom Corps (2005)
• John White Research Award (2005)
• John White Team Research Award (2005)
• Panel Manager for Biology of Plant-Microbe Associations program of the USDA/NRI/CSREES/USDA (2006)
• Keynote speaker at the Brazilian Phytopathological Society Meeting, Maringa, Brazil (2007)
• Keynote Speaker at the First International Symposium on Chili Anthracnose, Seoul, Korea (2007)

Publications

for complete list and reprints, please visit the lab webpage

• Correll, J.C. 2008. Fusarium wilt of tomato. Compendium of Tomato Diseases. Eds. J.B. Jones, et al. APS Press. (in press).
• Correll, J.C, and Paulus, A. O. 2008. Powdery mildew of tomato. Compendium of Tomato Diseases. Eds. J.B. Jones, et al. APS Press (in press).
• Correll, J. C., Cornelius, K., Feng, C., Ware, S. B., Gabor, B., and Harp, T. L. 2008. Overview of the phylogenetics species concept  in Colletotrichum as it relates to chili anthracnose. (Submitted).
• Morelock, T. E., and Correll, J. C. 2008. Spinach Breeding.  Pp. 183-212. In:J Prohens and F. Nuez (eds.), Vegetables I, Springer, New York.
• Timila, R. D., Correll, J. C., and Duwadi, V. R. 2008. Severe and widespread clubroot epidemics in Nepal. Plant Disease 92:317
• Irish, B. M., Correll, J. C., Feng, C., Bentley, T., and de los Reyes, B. G. 2008. Characterization of a resistance locus (Pfs-1) to the spinach downy mildew pathogen (Peronospora farinose f. sp. spinaciae) and the development of a molecular marker linked to Pfs-1. Phytopathology 98: (in press).
• Bo, Liu, and Correll, J. C. 2007. Molecular tools for taxonomy of Colletotrichum species. Brazilian Phytopathology 32: S21-S24.
• Tomlinson, A. N., Correll, J. C., Koike, S. T., Kammeijer, K. 2007.  First report of race 8 of downy mildew, caused by Peronospora farinosa f. sp. spinaciae, of spinach in the United States. Plant Disease 91:1205.
• Bo, L., Wasilwa, L. A., Guerber, J. C. , Morelock, T. E., O’Neill, N. R., and  Correll, J. C.  2007. Comparison of Colletotrichum orbiculare and allied Colletotrichum species for mtDNA RFLPs, intron RFLPs, sequence variation, vegetative compatibility, and host specificity. Phytopathology 97:1305-1314.
• Zhou, E, Jia, Y. Singh, P, Correll, J. C., and Lee, F. N. 2007. Instability of the Magnaporthe oryzae avirulence gene AVR-Pita alters virulence. Fungal Genetics and Biology 44:1024-1034.
• Correll, J. C., Feng, C., Irish, B. M., Koike, S. T., Morelock, T. E. and Bentley, T. C. 2007. Spinach downy mildew: overview of races and the development of molecular markers linked to major resistance genes. Advances in downy mildew research: 3:135-142. A. Lebeda and P.T.N. Spencer-Phillips (Eds). Palacky University Press.Czech Republic
• Jia, Y. Correa-Victoria, F., McClung, A., Zhu, L., Liu, G., Wamishe, Y., Xie, J., Marchetti, M. A., Pinson, S. R. M., Rutger, J. N., and Correll, J. C. 2007. Rapid determination of rice cultivar responses to the sheath blight pathogen Rhizoctonia solani using a micro-chamber screening method. Plant Disease 91:485-489.
• Irish, B, Correll, J. C., Koike, S. T., Morelock, T. E. 2007. Identification and cultivar reactions to races 8, 9, and 10 of the spinach downy mildew pathogen (Peronospora farinosa. f. sp. spinaciae) in the United States and Europe. Plant Disease 91:1392-1396.
• Gonzalez, E., Sutton, T. B., and Correll, J. C. 2006. Clarification of the etiology of Glomerella leaf spot and bitter rot of apple caused by Colletotrichum spp. Based on morphology and genetic, molecular, and pathogenicity tests. Phytopathology 96:982-992.
• Peres, N. A., Timmer, L. W., Adaskaveg, J. E., and Correll, J. C. 2005. Lifestyles of Colletotrichum acutatum. Plant  Disease 89:784-796.
• Correll, J. C., Villarroel, M. I., McLeod, P. J., Cazon, M. I., and Rivadeneria, C. 2005. First report of powdery  mildew caused by Leveillula taurica on tomato and pepper in Bolivia. Plant Disease 89:776.