In 1990 and 1991, a total of 3,496 isolates of Botrytis cinerea were collected from strawberry, wine grape, raspberry, and snap bean plantings and from nonmanaged wild blackberry hedges located in Oregon's Willamette Valley. The percentage of isolates resistant to benomyl (5 μg/ml) and to vinclozolin (10 μg/ml) averaged 52 and 17%, respectively; 16% were resistant to both fungicides. The frequencies of resistance to benomyl and vinclozolin were significantly higher (P≤0.05) in B. cinerea isolates obtained from strawberry than in isolates from the other crops. Of isolates of B. cinerea obtained from nonsprayed wild blackberry hedges, 38 and 6% were resistant to benomyl and vinclozolin, respectively [...]
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K. B. Johnson (1994) studied this question.