The two common postharvest pathogens on apples are Penicillium expansum , the cause of blue mold, and Botrytis cinerea, the cause of gray mold. These fungi have traditionally been considered “wound pathogens”, meaning that they invade fruit primarily through wounds created during harvesting, packing, or transport. During the past 10 years, however, storage operators have noted increasing levels of decay in unwounded fruit, especially Empire fruit, that are held in long-term CA storage.
Compiled by Dr. Dave Rosenberger, retired Plant Pathologist at Cornell's Hudson Valley Lab
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