40%氯虫苯甲酰胺·噻虫嗪水分散粒剂防治二化螟田间药效试验

通过田间试验研究不同药剂对二化螟防治效果、产量及用药成本的影响。结果表明,40%氯虫苯甲酰胺·噻虫嗪水分散粒剂10 g/667m2防治晚稻二化螟的效果明显高于常规用药15%阿维·三唑磷乳油100 mL/667m2,且40%氯虫苯甲酰胺·噻虫嗪水分散粒剂10 g/667m2能起到保护生态环境,减少农药用量、降低农药残留的作用。施药方法：于第3代二化螟卵孵盛期至2龄高峰前施药,可提高防效4.98%,每667 m2减少施药工本6元,增加产量31 kg,减少用药成本11元,667 m2增加总效益79.4元。

The Field Trial of 40%of Chlorantraniliprole and Thiamethoxam against Chilo suppressalis (Walker)

Effects of different pesticides on controlling rice stem borer,Chilo suppressalis（Walker）,yield and the cost of pesticide uses through out the field experiments.The results showed that,40% of chlorantraniliprole and thiamethoxam WDG（medication regimen A） with 10 g/667m 2 for controlling rice stem borer was obviously better than that of 15% AVI/three Triazophos EC 100ml/667m 2 which was one of the conventional insecticides, Chlorantraniliprole and thiamethoxam WDG with 10 g/667m 2 sprayed at the peak period of the egg hatching to the second instars in the third generation of rice stem borer,could improve the control efficiency by 4.98%,the labour for insecticide spraying could reduce by 6 yuan（RMB）,the yield could increase by 31 kg,insecticide costs would reduce by 11 yuan.And the total benefits would increase by 79.4 yuan per 667 m 2.This chemical can be served to protect the ecological environment,reduce pesticide use,and decreased pesticide residues.