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[目的]通过室内毒力测定和田间药效试验评价氟啶虫胺腈原药以及22%氟啶虫胺腈悬浮剂对水稻褐飞虱的杀虫活性及田间防治效果。[方法]分别采用稻茎浸渍法和常规喷雾法进行室内毒力测定和田间药效试验。[结果]氟啶虫胺腈和吡虫啉原药对水稻褐飞虱的LC50值分别为3.52、1.60 mg/L,LC90值分别为31.27、21.50 mg/L,表明氟啶虫胺腈与吡虫啉对褐飞虱均具有较好的毒杀作用。22%氟啶虫胺腈悬浮剂用量50、75、100 g a.i./hm2于药后3 d的防效达61.6%～97.1%,具有较好的速效性,药后7～14 d的防效达84.2%～99.2%,表现出较好的持效性。[结论]22%氟啶虫胺腈悬浮剂是防治水稻褐飞虱的较好药剂,推荐用量50～75 g a.i./hm2,重点喷施水稻茎基部。
[Objective] The aim of the study was to evaluate the insecticidal activity of nifedipine and 22% nitrofuranthamine suspension against Nilaparvata lugens (Nilaparvata lugens) through field toxicity test and field efficacy test. [Method] The indoor toxicity test and field efficacy test were conducted by rice stem dipping method and conventional spraying method respectively. [Result] The LC50 values of flonicamid and imidacloprid were respectively 3.52,1.60 mg / L and LC90 values of 31.27 and 21.50 mg / L, respectively, indicating that both nitrofurantoin and imidacloprid had the same effect on N. lugens Better poisoning effect. The control efficacy of 22% nitrofuranton suspension at 50,75,100 g ai / hm2 reached 61.6% ~ 97.1% at 3 days after treatment, with good quick-acting effect and 7 ~ 14 days after treatment Up to 84.2% ~ 99.2%, showing good retention. [Conclusion] 22% nitrofuranton suspension was a good agent for controlling brown planthopper in rice. The recommended dosage was 50-75 g a.i./hm2, and the spraying of rice stem base was the key point.