50%氟虫腈·敌百虫乳油防治水稻稻飞虱田间药效剂量的筛选

目的]探讨复配制剂50%氟虫腈.敌百虫乳油防治水稻稻飞虱的最佳剂量。方法]以50%氟虫腈.敌百虫乳油4506、007、509、00g/hm2为处理,以50 g/L氟虫腈悬浮剂37.5 g/hm2为药剂对照,以清水为空白对照,研究各处理对水稻稻飞虱的防治效果。结果]田间试验结果表明,处理剂量范围内,药剂对水稻安全,对水稻天敌种群无明显影响;以50%氟虫腈.敌百虫乳油750 g/hm2处理防效最好。结论]50%氟虫腈.敌百虫乳油是一种高效、低毒的化学复配制剂农药,适于在生产上推广。

Field Efficacy Experiment of 50% Fipronil·trichlorfon EC against Rice Hopper

Objective] The study aimed to reveal the optimal dosage of 50% fipronil·trichlorfon EC against rice planthopper.Method] In order to study the control effect of various treatments against rice planthopper,the 450,600,750 and 900 g/hm2 of 50% fipronil·trichlorfon EC were designed as treatments,meanwhile 37.5 g/hm2of 50 ?g/L fipronil SC and water were regarded as normal control and blank control,respectively.Result] The results of field experiment showed that there were no obvious phytotoxicity and no obvious harmful effects on rice and natural enemies in all treatments,respectively;750 g/hm2 was the optimal dosage of 50% fipronil·trichlorfon EC against rice planthopper.Conclusion] 50% fipronil·trichlorfon EC was a high efficacy,low toxicity compound pesticide that could be generalized in production.