Abstract The antifungal effect of 1×1011 cfu·g-1 Bacillus Subtilis WP against cucumber gray mold(Botrytis
cinerea)tested by allied toxicity measurement and field efficacy trials.The result showed that Bacillus Subtilis WP
had good inhibitory effect on cucumber gray mold(Botrytis cinerea)with EC50 of 5.89×106 cfu·mL-1,which
indicated that it had the same effect with control insecticides Pyrimethanil.The same result was found in field
experiment.The efficacies of 0.08 g·m-2 Bacillus Subtilis and 0.11 g·m-2 control insecticides were 70.81 % and
77.40 %,respectively.
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