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[目的]为了筛选防治稻飞虱的良好药剂配方,采用玻管药膜法测定哒螨灵和仲丁威对稻飞虱的联合毒力,并加工成悬乳剂进行了田间试验。[结果]哒螨灵对灰、褐飞虱的LC50值分别为0.252、0.744 mg/L,仲丁威对灰、褐飞虱的LC50值分别为10.541、7.255 mg/L;哒螨灵和仲丁威按质量比1颐1、1颐2混配对灰飞虱共毒系数分别为141.85、125.04,增效作用明显;按质量比1颐1、1颐2、1颐4混配对褐飞虱的共毒系数分别为180.67、189.57、148.70。35%哒螨灵·仲丁威悬乳剂175 mg/L施药后3、5、7、10 d校正防效分别为93.7%、87.2%、89.0%和82.5%,具有很好的速效性和持效性。[结论]哒螨灵和仲丁威组合是防治稻飞虱的良好药剂。
[Objective] The purpose of this study was to screen the good formula of planthopper against rice planthopper, and to determine the combined virulence of pyridaben and cinctomyces against planthoppers by glass tube membrane method. [Result] The LC50 values of pyridaben against ash and brown planthopper were 0.252 and 0.744 mg / L, respectively. The LC50 value of stilbene to ash and brown planthopper were 10.541 and 7.255 mg / L, respectively. The concentrations of pyridaben and stilbene The co-toxicity coefficients for the BPH were 141.85 and 125.04, respectively, with a synergistic effect compared with those of 1 and 1 and 2, respectively. The co-toxicity coefficients of the two combinations with BPH-1, 180.67,189.57,148.70.35% The calibration efficiencies of pyridaben, s-trimethopril, 175 mg / L at 3, 5, 7 and 10 d after pesticide application were 93.7%, 87.2%, 89.0% and 82.5% Very fast and effective. [Conclusion] The combination of pyridaben and sec-butyl was a good medicament for controlling planthoppers.