Mucor piriformis E. Fischer
Distribution: Common to all fruit-growing regions in eastern North America.
Infected tissue appears light brown, soft and watery.
Themis Michailides, Univ. of California
Infected tissue appears light brown, soft, and watery [Mucor piriformis on decaying pear-TM.tif]. The infection usually develops at wound sites, at the calyx end, or at the stem end of the fruit. Complete decay occurs rapidly under packinghouse conditions and in about 2 months in cold storage [Mucor piriformis on Fuji apples-TM.tif]. Fully rotted apples release large amounts of liquid containing the infective propagules of the fungus, which may spread the disease, but this is relatively uncommon.