增效剂与常规药剂混用对抗性二点叶螨增效作用的研究

供试二点叶螨为抗氧乐果、甲氰菊酯、螨死净和抗螨嗪菊酯混剂种群 ,用 4种增效剂分别与氧乐果、甲氰菊酯、螨死净、螨嗪菊酯混用研究其增效作用。结果表明 :增效磷 (SV₁)对甲氰菊酯、氧乐果、螨死净、螨嗪菊酯的增效作用最明显 ,增效倍数分别为23.33、17.26、7.09、9.42 ;其次是八氯二丙醚 (S₂)和增效醚 (Pb) ,全能增效剂 (ARS)对4种药剂增效作用最差。田间药效试验结果表明 :增效剂SV₁和S₂ 与氧乐果、甲氰菊酯、螨死净混用 ,对苹果和豇豆上的二点螨均有增效作用。

Study on synergistic action of synergists to resistant Tetranychus urticae Koch

The synergistic action of the mixture 4 synergists (SV 1, S 2, P b, ARS) respectively plus omethoate, fenpropathrin, clofezine and fenpropathrin clofentezine to 4 resistant populations (Ro, Rf, Rc, Rfc) of Tetranychus urticae Koch selected in laboratory were studied. The results showed that the synergistic effect of SV 1 to fenpropathrin, omethoate, clofentezine and fenpropathrin clofentezine was the most significant, and the synergistic factor (SF) was 23.33, 17.26, 7.09, 9.42, respectively; the next were S 2 and Pb, whereas ARS had no significant synergism to them. The results of field trial of insecticides showed that SV 1 had synergistic effect to Tetranychus urticae Koch on apples and cowpea.