Abstract
Pythium megalacanthum de Bary was isolated from plug seedlings of cabbage affected by damping-off in a greenhouse of our institute in April 1996. The hypocotyls of damaged plants developed a white rot, which was reproduced by an isolate of P. megalacanthum and severe at 10°C. At a supply center for vegetable seedlings in Mie Prefecture, P. megalacanthum was also isolated from cabbage plug seedlings with damping off in February and October 1997. This is the first report on the disease of cabbage caused by P. megalacanthum.
