Properties of iprodione resistant Botrytis cinerea. (1) Growth features in media containing pure dicarboximide fungicides

Abstract

Iprodione resistant isolates of Botrytis cinerea were obtained from tomatoes cultivated in a vinyl house using iprodione fungicide, and the growth of isolates in PDA media containing pure dicarboximide compounds was tested. The growth of the isolates was suppressed at 35-75 ppm of iprodione, but recovered at 100-500 ppm. Growth features in response to iprodione were found on both wettable powder and the pure compound at almost the same density as the efficient ingredient in the media. But growth features in response to procymidone and vinclozolin could hardly be detected.