Strains of Botrytis cinerea Resistant to Benomyl and Captan in the Field. H. S. Pepin, Research Scientist, Agriculture Canada, Research Station, Vancouver, B.C. V6T 1X2. E. A. MacPherson, Technician, Agriculture Canada, Research Station, Vancouver, B.C. V6T 1X2. Plant Dis. 66:404-405. Accepted for publication 27 July 1981. Copyright 1982 Department of Agriculture, Government of Canada. DOI: 10.1094/PD-66-404.

Isolates of Botrytis cinerea from unsprayed and fungicide-treated field plots were resistant to captan and/or benomyl in laboratory tests. Benomyl-treated plots yielded significantly higher numbers of benomyl-resistant isolates than plots not treated with benomyl, but captan resistance was not related to captan treatment.

Keyword(s): bean, Fragaria ananassa, fungicide resistance, Phaseolus vulgaris, raspberry, Rubus idaeus, strawberry.