腈吡螨酯对扁豆二斑叶螨的田间药效及安全性评价

Field Control Efficacy of Cyenopyrafen 30%SC Against Tetranychus Urticae and Its Saftey Evaluation on Lablab Purpureus(L.)Sweet

二斑叶螨是扁豆主要害虫之一,发生较重时可降低扁豆产量和品质。本研究评价了30%腈吡螨酯悬浮剂对扁豆二斑叶螨的田间药效及其对扁豆的安全性。田间使用有效成分量67.5、90、112.5 g/hm2,药后1 d三地的田间防效66.5%~85.9%、药后3 d 82.1%~92.3%、药后7 d 86.9%~95.2%、药后14 d 80.9%~96.1%,能有效防控扁豆二斑叶螨,具有较好的速效性和良好的持效性。作物安全性试验表明30%腈吡螨酯悬浮剂对扁豆安全。建议登记30%腈吡螨酯悬浮剂防治扁豆二斑叶螨,推荐使用有效成分量67.5~112.5 g/hm^(2)(制剂量15~25 mL/667m^(2)),于二斑叶螨发生初期施药1次。

As one of the major pests on Lablab purpureus(L.)Sweet,Tetranychus urticae can reduce the yield and quality of Lablab purpureus(L.)Sweet.This study evaluated the field efficacy of cyenopyrafen 30%SC against Tetranychus urticae and its saftey on Lablab purpureus(L.)Sweet.Field control efficacy ranged from 66.5%~85.9%,82.1%~92.3%,86.9%~95.2%,80.9%~96.1%at 1,3,7 and 14 days after application of cyenopyrafen 30%SC,with dose of 67.5,90,112.5 g a.i./hm 2(15,20,25 mL/667m^(2)).The product demonstrated both quick and long-term efficacy in effectively controlling Tetranychus urticae on Lablab purpureus(L.)Sweet.The results of laboratory test for crop safety evaluation confirmed the pesticide’s safety for application.It is recommended to apply cyenopyrafen 30%SC once at the initial stage of Tetranychus urticae on Lablab purpureus(L.)Sweet,with dose of 67.5~112.5 g a.i./hm^(2).