In order to evaluate the application prospect of different types of insecticides on maize to control main Lepidoptera during the maize tassel stage,the toxicity of six insecticides to Helicoverpa armigera,Ostrinia fur-nacalis and Conogethes punctiferalis were determined by Diet incorporation method,and then their control efficiency was evaluated by field tests.The results of toxicity tests showed that chlorantraniliprole,tetrachlorantraniliprole,em-amectin benzoate and chlorfenapyr had higher toxicity to H.armigera,O.furnacalis,C.punctiferalis,with the value of LC50 were 0.29-0.51 mg/L,0.17-0.51 mg/L,0.03-0.20 mg/L and 0.61-8.32 mg/L,respectively.The toxicity of phoxim was the lowest to H.armigera,O.furnacalis and C.punctiferalis,with the value were 121.01 mg/L,80.39 mg/L,63.48 mg/L.The field efficacy test of six insecticides showed certain control effects on maize pests in ear period.Each treatment of chlorantraniliprole,tetrachlorantraniliprole,emamectin benzoate and chlorfenapyr has a high con-trol effect on those pests,with the control effect were 73.29％-83.52％,significantly higher than the treatment of me-thoxyfenozide and phoxim,and can effectively control the damage of pests.Based on the toxicity and field efficacy tests,chlorantraniliprole,tetrachlorantraniliprole,emamectin benzoate and chlorfenapyr have good application pros-pects in the control of maize ear pests.In the field control,appropriate pesticides can be reasonably selected.
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