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Multiple fungicide resistance to benzimidazoles, dicarboximides and diethofencarb in field isolates of Botrytis cinerea in Israel
Author(s) -
ELAD Y.,
YUNIS H.,
KATAN T.
Publication year - 1992
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1992.tb02314.x
Subject(s) - carbendazim , fungicide , iprodione , botrytis cinerea , biology , benzimidazole , horticulture , inoculation , fungi imperfecti , botrytis , benomyl , botany , chemistry , organic chemistry
During the period January‐March 1989, 15 greenhouses at 12 sites in Israel were surveyed for the presence of fungicide‐resistant strains of Botrytis cinerea , using a fungicide‐amended Botrytis ‐selective medium. Resistance to benzimidazoles (Ben R ) and to dicarboximides (Dic R ) was frequent in most sites. Resistance to carbendazim + diethofencarb (Ben R NPC R ) was found in all eight sites in which a mixture of these fungicides had been used against grey mould, but not in other sites. A new phenotype of multiple fungicide resistance was found among these isolates. The new phenotype, designated Ben R Dic R NPC R , combines the three previously described characteristics of resistance to benzimidazole, dicarboximide and N ‐phenylcarbamate fungicides. It was found only in cucumber greenhouses that had been sprayed with the fungicide mixture carbendazim + diethofencarb against grey mould. Isolates of this phenotype were pathogenic in artificial inoculation of cucumber cotyledons treated with carbendazim, iprodione or carbendazim + diethofencarb.