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为了解长沙地区小菜蛾田间种群抗药性现状及其抗性机理 ,1997～ 2 0 0 0年 ,用浸叶法监测了长沙地区小菜蛾田间种群对乙酰甲胺磷、氰戊菊酯、苏云金杆菌、抑太保和齐墩螨素 5种杀虫剂的抗药性 .结果表明 ,长沙地区小菜蛾田间种群对氰戊菊酯抗性为极高抗水平 ,对乙酰甲胺磷由中抗水平发展到了高抗水平 ,且二者抗性水平有进一步上升的趋势 ;对抑太保、苏云金杆菌和齐墩螨素均处于敏感状态 ,但对于抑太保和苏云金杆菌 ,个别年份抗性水平达到低抗水平 .增效剂磷酸三苯酯、94%增效醚、40 %增效磷对不同杀虫剂增效作用测定结果表明 ,磷酸三苯酯对乙酰甲胺磷、氰戊菊酯有不同程度的增效作用 ;94%增效醚和 40 %增效磷均对乙酰甲胺磷、氰戊菊酯、抑太保和齐墩螨素有不同程度的增效作用 ,前者对氰戊菊酯 ,后者对乙酰甲胺磷增效作用最明显 .
In order to understand the status of resistance and resistance mechanism of diamondback moth to diamondback moth in Changsha, from 1997 to 2000, the effects of acephate, fenvalerate, , Epimedium and abamectin were studied.The results showed that the resistance of fenvalerate to diamondback moth in Changsha was extremely high and resistant to acephate High resistance level, and the two resistance levels have a tendency to rise further; the sensitivity to tocopheryl, Bacillus thuringiensis and abamectin are sensitive, but for the Ipomoea biloba and Bacillus thuringiensis, the individual year low resistance level. The synergistic effect of triphenyl phosphate, 94% synergistic ether, 40% synergistic phosphorus on different insecticides showed that triphenyl phosphate had different degrees of increase of acephate and fenvalerate Effect; 94% synergistic ether and 40% synergistic phosphorus acephate, fenvalerate, eptaphos and abamectin have varying degrees of synergies, the former for fenvalerate, the latter Synergistic effect of acephate the most obvious.