First record of Pythium mastophorum in New Zealand and its pathogenicity relative to other Pythium spp.

摘要

Abstract Pythium mastophorum, not previously recorded in New Zealand, was isolated from soil from two Auckland strawberry‐growing sites. The oospores have characteristic regular conical mammiform spines, readily distinguishing it from Pythium spp. other than P. polymastum. A brief study of these isolates was carried out to determine how the pathogenicity to vegetable seedlings of P. mastophorum compared with that of other Pythium spp. They were found to be moderately pathogenic to a range of these seedlings.