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Abstract
A fruit soft rot caused by Mucor piriformis occurred on sweet persimmon storages in Jinju, Changwon and Gimhae, Gyeongnam province, Korea, 2003. The disease infection usually started from wounding after cracking of fruits. At first, the lesions started with water soaked and rapidly softened and diseased lesion gradually expanded. Colonies on potato dextrose agar at 20°C were whitish to olivaceous-buff. Sporangia were globose, black and 96~153 μm in size. Sporangiophores were 26~42 μm in width. Sporangiospores were ellipsoid and 5.8~10.6 x 4.3~7.6 μm in size. Columella was obovoid, cylindrical-ellipsoidal, pyriform, subglobose and 80~125 μm in size. Optimal temperature for mycelial growth was 20°C on PDA. The causal organism was identified as M piriformis. This is the first report of fruit soft rot on sweet persimmon caused by M. piriformis in Korea.
