Abstract
Gray mold and anthracnose of Stemona japonica (Blume) Miq. occurred in Hachijo-island of Tokyo Metropolis in 1999-2001. A Botrytis sp. isolated from the infected plants with gray mold was identified as Botrytis cinerea Persoon: Fries, while Colletotrichum sp. isolated from infected plants with leaf and stem blight were identified as Colletotrichum dematium (Persoon: Fries) Grove and C. gloeosporioides (Penzig) Penzig & Saccardo. Inoculation tests showed that these fungi were the causal agents of the respective diseases. This is the first report on these diseases in Japan.
