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用药膜法对旅客列车上的德国小蠊的抗药性进行测定 ,结果显示杀虫剂对列车上德国小蠊的作用效果下降 ,即列车上的德国小蠊比敏感品系对杀虫剂具有较强的抗击倒和抗致死的能力 ,其中 0 .0 5 %的敌敌畏、辛硫磷和三氯杀虫酯对其不击倒 ,并且敌敌畏和三氯杀虫酯对列车上的德国小蠊的 72h死亡率为零 ,而对敏感品系的死亡率分别为 6 3.3%和 5 3.3%。所以单一的化学防治必然会产生较高的抗药性 ,结果造成增加防治成本和降低防治效果。
The resistance of German cockroach on passenger trains was measured by the membrane method. The results showed that the effect of insecticides on the German cockroach on the train decreased. That is, the German cockroach on the train had a stronger insecticide than the sensitive strains on the train Of anti-lethal and anti-lethal ability, of which 0.5% of dichlorvos, phoxim and trichloro-insecticide did not knock down on them, and dichlorvos and trichloro-insecticide on the train on the German cockroach 72h The mortality rate was zero, while the mortality rates for sensitive strains were 6 3.3% and 53.3% respectively. Therefore, a single chemical control will inevitably have a higher drug resistance, resulting in increased cost and reduce prevention and control.