The Effects of Benomyl on Sensitive and Tolerant Isolate of <i>Botrytis cinerea</i> infecting Strawberries

Abstract

SUMMARY Strawberry plants cv. Cambridge Vigour growing in a walk‐through polyethylene tunnel were experimentally inoculated with one benomyl‐sensitive and two benomyl‐tolerant isolates of Botrytis cinerea alone and in combination. Three applications of benpmyl significantly increased the number of infected fruits in four out of the six treatments. There was no significant increase in infection on plants inoculated only with the benomyl‐sensitive isolate. Plants inoculated only with a slow growing, benomyl‐tolerant isolate showed an increase in infection which was not quite enough to be significant at the 5 per cent level. The fast growing benomyl‐tolerant isolate spread more rapidly from plot to plot than the slow growing isolate.