Pythium Rot of Cabbage Caused by Pythium aphanidermatum (Edson) Fitzpatrick and Pythium sp.

Abstract

Pythium rot of cabbage, Brassica oleracea L., occurred in Tsukuba city, Ibaraki Prefecture in September, 1995. The stems just above the soil surface were affected and diseased tissues turned white in color, showing dry rot symptom. Both Pythium aphanidermatum (Edson) Fitzpatrick and Pythium sp. group ‘HS’ isolated from diseased plants were demonstrated as causal pathogens. This is the first report on stem rot of cabbage caused by Pythium species.