抄録
Cylindrocarpon root rot of Arbutus unedo L. and Ardisia japonica (Thunb.) Blume occurred in Tokyo Metropolis in 2003. The causal fungus isolated from the diseased plants was identified as Cylindrocarpon destructans (Zinssmeister) Scholten. Inoculation tests showed that this fungus was the causal agent of these diseases. This is the firstreport on the diseases in Japan.