Comparative experimental study of several fungicides to Botrytis cinerea

The fungitoxicity of six fungicides registered in control of tomato gray mold and seven fungicides unregistered to Botrytis cinerea were determined.The result showed that 25% SYP-2048 EC had the highest inhibition rates in the six registered fungicides,of which the EC50 value was 0.14 mg·L-1;25% prochloraz EC had the highest inhibition rates in the five unregistered fungicides(10% polyoxin B included),of which the EC50 value was 0.66 mg·L-1.In microbial fungicides,the inhibition rate of Trichoderma viride WP(2×108 cfu·g-1),of which the EC50 value was 0.001×108 cfu·L-1,higher than Bacillus subtilis AS(8×109cfu·mL-1).