Gray mold originating from infection at stem bowl; gray spore masses may be visible at the diseased area under high humidity. Photo: CL Xiao, USDA-ARS.
Gray mold commonly originating from infection of wounds on the fruit; decayed area brown, spongy to firm; decayed tissue may become soft in very advanced stage. Photo: CL Xiao, USDA-ARS.
Gray mold originating from infection of the calyx of a Red Delicious; white to gray mycelium and gray spores may cover the decayed area under high humidity conditions. Photo: CL Xiao, USDA-ARS.
Gray mold at the stem-bowl of a Gala. Decayed area brown and spongy to firm. Photo: A. Amiri, WSU Plant Pathology.