Abstract
Monitoring sensitivity to benzimidazoles, dicarboximides and diethofencarb was conducted in 365 isolates of B. cinerea collected from 31 protected cucumber fields and 28 open vineyard in Yamanashi Prefecture from 1994 to 1996. On cucumber, frequency of resistant strain to diethofencarb mixture was as high as 50%, and one third of them was highly resistant to diethofencarb. On the other hand, only a few resistant strains to diethofencarb mixture were detected in the population of the fungus on grapevine.
