Abstract
An outbreak of Phytophthora rot of strawberry cv. Reiko and Hoko-Wase was recorded in Shizuoka Prefecture in 1978. Diseased plants showed crown, petiole and root rot as well as wilt. Phytophthora sp. was isolated from the diseased tissues. The fungus was identified as P. nicotianae var. parasitica from characteristics of sporangia and sex organs, cardinal temperature and electrophoresis. All of isolates of P. nicotianae var. parasitica were of the mating type A2. Artificial inoculation with isolated fungus caused crown, petiole and root rot of strawberry plants and the inoculum was recovered.
