Successes in breeding disease-resistant crops have often been countered by the ability of plant pathogen populations to evolve greater virulence. My research program focuses on development of strategies to increase the durability of host plant resistance. Specific interests include studying the influence of host genetic diversity on plant disease epidemics and using quantitative and population genetic approaches to analyze host-parasite interactions. The program has both basic and applied objectives, and utilizes a variety of methodologies including field experiments, controlled environment studies, and computational approaches.