Toxicity Test in Laboratory and Control Efficiency in Field Trials of Five Insecticides to Heterolocha jinyinhuaphaga Chu

[Objective] The aim was to make sure the control effects of common insecticides on Heterolocha jinyinhuaphaga Chu.[Method] The toxicity in laboratory and control efficiency in the field of five insecticides(chlorpyrifos,dichlorvos,phoxim,deltamethrin and bata-cypermethrin) to H.jinyinhuaphaga were tested.[Result] In the five insecticides,the toxicity of bata-cypermethrin was the best,its LC50 after 48 hours was 0.019 3 μg/ml.The others were chlorpyrifos,dichlorvos,phoxim and deltamethrin,and their LC50 after 48 h were 0.027 6,0.050 5,0.053 3 and 0.056 3 μg/ml,respectively.The control efficiency in the field of five insecticides all reached above 80% after seven days,among them the control efficiencies of 4.5% bata-cypermethrin EC and 48% chlorpyrifos EC were the best,and they both were 100%.[Conclusion] The five insecticides had high toxicity and control efficiency in the field to H.jinyinhuaphaga.