Occurrence of Thiophanate-methyl Tolerant Isolates of Fusarium nivale (=Gerlachia nivalis), A Causal Fungus of Snow Mold of Winter Wheat, in Japan

Abstract

In 1981, Fusarium nivale (=Gerlachia nivalis) isolates were collected from winter wheat in Hokkaido, and thier tolerance to thiophanate-methyl and benomyl was investigated in vitro. About 87 percents of 45 isolates tested were found to be highly tolerant to thiophanate-methyl (minimal inhibitory concentration 40, 000ppm) and benomyl (minimal inhibitory concentration 1, 000ppm).