Evaluation of control effect of tetrachlorantraniliprole corn whole plant spray and flare opening application treatment on Spodoptera frugiperda

To evaluate the bioactivity and control effect of tetrachlorantraniliprole(SC)corn whole plant spray and flare opening application treatment against Spodoptera frugiperda and to provide technical support for the comprehensive prevention and control of S.frugiperda.Leaf spray method was used to determine the control effect against second instar larva of S.frugiperda;with 40%phoxim(EC)of phoxim as the control agent,10%SC of tetrachlorantraniliprole was applied in the field by spray and flare opening application,the number of S.frugiperda on labeled corn was investigated,and the control effect was calculated on 1 day before and 1 day,3 day and 7 day after the application of pesticide.The results showed that tetrachlorantraniliprole had a good control effect to the second instar larvae of S.frugiperda;the control effect against S.frugiperda with spraying of 10%SC of tetrachlorantraniliprole preparation in 600 g/hm 2 after 1 day,3 day and 7 day were 75.90%,91.91%,and 92.02%respectively;the control effect against S.frugiperda with flare opening application of 10%SC of tetrachlorantraniliprole preparation in 300 g/hm 2 after 1 day,3 day and 7 day were were 82.28%,89.52%and 91.23%respectively,and the control effect against S.frugiperda with two application mothods of 40%EC of phoxim was preparation in 1500 g/hm 2 was poor.Tetrachlorantraniliprole had a good control effect on S.frugiperda,and the application method of flare opening application could save more than 50%of pesticide usage,which had a broad application prosect in the prevention and control of S.frugiperda and other pests.