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Biology, epidemiology, and integrated management of corn and wheat diseases.  Fusarium head blight (FHB) of wheat; strength and importance of a within-field source of inoculum (surface residue) for FHB development under conditions of high background (air-blown) inoculum levels; the role of surface residue on the development of FHB is influenced by year-to-year variation in weather conditions; weather-related factors on FHB inoculum buildup and dissemination within wheat canopy; integrated disease management strategies for FHB; disease resistance and fungicide use on FHB, powdery mildew, and Stagonospora blotch of wheat.  Also: disease forecasting system for FHB of wheat; characterization of the resistance of commonly-cultivated corn hybrids to northern corn leaf blight (NCLB); determination of the race structure of the NCLB pathogen in Ohio; and development of risk-based management decision-making tools for foliar diseases of corn (gray leaf spot and northern corn leaf blight) and wheat (Stagonospora blotch and powdery mildew).