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General and contact information

Howard Judelson's background
education and interests

The oomycetes
learn more about these exciting organisms

The late blight disease
learn more about the problems that P. infestans causes

Research Interests
Ongoing research projects

Other lab members


Howard Judelson


After receiving a B.S. degree in Biochemistry from Cornell University, I moved to the University of Wisconsin-Madison where I received my Ph.D. in Molecular and Cellular Biology. My thesis research concerned the developmental biology of a slime mold, Dictyostelium discoideum, with a focus on the regulation of post-translational glycosylation of lysosomal enzymes. I then moved to the University of California-Davis. There I started as a Postdoctoral Fellow studying the lettuce downy mildew pathogen, Bremia lactucae. I then obtained an appointment as a Research Faculty member and began to study various Phytophthora species, especially P. infestans. This included a few years in the Center for Engineering Plants for Resistance Against Pathogens (CEPRAP). In 1994 I came to the University of California-Riverside as an Assistant Professor in the Department of Plant Pathology. I was promoted to Associate Professor in 1997 and full Professor in 2002, and currently serve as Department Chair.

Research Interests

My lab's research seeks to characterize the molecular, cell, and developmental biology of oomycetes, particularly those within the genus Phytophthora. Most of our projects involve Phytophthora infestans, which causes the late blight diseases of tomato and potato. Our projects address both topics in the fundamental biology of P. infestans (metabolism, evolution, cellular regulation) and issues relevant to the late blight diseases. Click here for more information about specific research projects.

Honors and Awards

Singletary Family Endowed Chair in Agriculture
Fellow, American Phytopathological Society
Fellow, American Association for the Advancement of Science
Ruth Allen Award, American Phytopathological Society
Fellowship, National Institutes of Health
Fellowship, McKnight Foundation


Financial support for the laboratory currently comes from the United States Department of Agriculture-National Institute of Food and Agriculture, the National Science Foundation, and biotechnology companies.

Teaching activities

Every year I teach GEN241 (Advances in Bioinformatics and Genomics), a graduate level class). I also contribute to a number of undergraduate and graduate seminars, making presentions on Ethics, Intellectual Property, Writing Scientific Papers, and other topics. Until recently I also taught Bio107A (Molecular Biology), an undergraduate class), and directed a NSF-funded Research Experiences for Undergraduates program.