杀虫威对棉铃虫、烟青虫、菜青虫的防治效果

Evaluation of a new carbamate insecticide Shachongwei on three lepidopteran pests.

田间试验表明 ,新氨基甲酸酯杀虫剂杀虫威对鳞翅目害虫棉铃虫、菜青虫、烟青虫防治效果优良。杀虫威 2 0 %EC在河南防治 2代棉铃虫使用剂量 1 0g (a.i.) 667m2 药后 2～ 7d ,校正防效为90 65 %～ 97 72 % ,在山东药后 3～ 5d ,防效为 85 1 7%～ 91 2 3 % ,7 5g (a .i.) 667m2 相应药效两地分别为 88 41 %～ 95 2 7%和 81 40 %～ 85 61 % ;防治 3代棉铃虫使用剂量 2 0g (a.i.) 667m2 药后 2～ 5d ,防效两地分别为 83 93 %～ 86 1 5 %和 85 5 3 %～ 88 2 9% ,1 5g (a .i.) 667m2 相应药效分别为 77 66%～80 2 3 %和 78 5 0 %～ 83 75 %。防治烟青虫使用剂量 1 0g (a.i.) 667m2 药后 3～ 7d校正防效为 85 5 7%～ 88 2 9% ,7 5g (a .i.) 667m2 相应药效为 81 5 1 %～ 86 1 1 %。防治菜青虫使用剂量 7 5～ 1 0g (a .i.) 667m2 药后 3～ 7d防效为 87 5 0 %～ 96 1 1 %。

Experiments indicate that a new carbamate insecticide Shachongwei, was highly effective in controlling three lepidopteran pests Helicovenpa armigera, Helicoverpa assulta and Pieris rapae. The results of field assays demonstrated that the effects of 20% EC at the second stage of H. amigera was 90.65%～97.7% 2～7days after the application of 10 g (a.i.)/667 m\+2 in Henan Province,and 85 17%～91 23% after 3～5 days in Shandong Province. The effects were 88 49%～95 27% and 81 40%～85 61% at 7 5 g (a.i.)/667 m\+2 in two districts respectively. Meanwhile, the trials showed that its efficacy in controlling H. armigera at the third stage remained at 83 93%～86.15% and 85 53%～88 29% 2～5 days after application of 20 g (a.i.)/667 m\+2, and 77 66%～80 23% and 78 80%～83 75% at 15 g (a.i.)/667 m\+2 in the two provinces respectively. On the other hand, control efficacy of Shachongwei 20% EC on H. assulta was 85 57%～88 29% 3～7 days after the application of 10 g (a.i.)/667 m\+2, and 81 51%～86C11% after the application of 7 5 g (a.i.)/667 m\+2 respectively. Its effects on P. rapae remained at 87 50%～96 11% 3～7 days after the application of 7 5～10g(a.i.)/667 m 2.