由于小菜蛾极易产生抗药性 ,本县有机磷、氨基甲酸酯、拟除虫菊酯等药剂已无防效 ,卡死克经过 3年应用效果亦极差。 1998年我们对 5 %抑太保等 5种药剂筛选表明 :5 0 %宝路、0 .6 %齐螨素、5 %锐劲特、5 %抑太保 4种药剂药后 6天效果达 95 .43%～ 10 0 % ;叶片为害率仅 14.31%～ 17.73% ,为害比卡死克减轻 6 2 .88%～ 70 .14% ,比对照减轻 74.72 %～ 79.6 0 %。 As the diamondback moth easily produce resistance, the county organic phosphorus, carbamate, pyrethroid and other agents have no anti-efficiency, stuck after 3 years the effect is also very poor. In 1998, we screened 5 kinds of agents such as 5% Coptidis so as to show that 95% of the 6 kinds of medicaments after 50% Po Road, 0.6% of the total compound mites, 5% of Fipronil and 5% of Coptidis are effective for 6 days. 43% -100%. The leaf damage rate was only 14.31% ~ 17.73%, and the damage was 62.88% ~ 70.14% less than that of the control, 74.72% ~ 79.6% less than the control.