Summary: The objectives of this project were: 1. Determine effects of preharvest applications of fungicides on postharvest decay including gray mold and blue mold. 2. Determine effects of preharvest applications of biocontrol agents for control of postharvest decay including gray mold and blue mold. 3. Determine preharvest colonization of floral parts of fruit by B. cinerea and its relationship to postharvest decay. 4. Determine inoculum sources of Botrytis cinerea in the orchard. 5. Test sensitivity to thiabendazole (TBZ) among B. cinerea isolates from apples collected from various apple production areas in eastern Washington. 6. Study the populations of Botrytis isolates from apples in eastern Washington.
