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[目的 ]了解采取不同灭蚊措施后 ,嗜人按蚊和中华按蚊对溴氰菊酯和 DDT的敏感性。 [方法 ]采用WHO成蚊滤纸接触法 ,观察蚊虫死亡率。 [结果 ]溴氰菊酯浸帐灭蚊 1年、3年和 DDT滞留喷洒灭蚊 3年的地区 ,嗜人按蚊对溴氰菊酯区分剂量死亡率分别为 83.8% ,83.7%和 84.7% ,为初步抗性群体 ,L T5 0 分别为 8.6 9,7.48和9.87min;中华按蚊对溴氰菊酯区分剂量死亡率分别为 76 .5 % ,5 7.0 %和 79.0 % ,为抗性群体 ,L T5 0 分别为 12 .0 ,15 .4和 11.2 m in;DDT喷洒地区嗜人按蚊对 DDT区分剂量死亡率为 95 .8% ,为初步抗性群体 ,L C5 0 为 0 .73% ;中华按蚊对 DDT区分剂量死亡率为 44 % ,为高抗群体 ,L C5 0 >4%。[结论 ]大量地在稻田使用杀虫剂 ,导致中华按蚊对溴氰菊酯和 DDT已产生抗药性 ,尚未发现嗜人按蚊产生明显抗药性。
[Objective] To understand the sensitivity of Anopheles anthropophagus and Anopheles sinensis to deltamethrin and DDT after adopting different anti-mosquito measures. [Method] The WHO adult mosquito filter paper contact method was used to observe the mosquito mortality rate. [Result] The dose-divided mortality of Anopheles anthropophagus to deltamethrin was 83.8%, 83.7% and 84.7% respectively in the areas of 1 year, 3 years and 3 years of DDT detention and spraying and mosquito killing, , And the initial resistance population was 8.69, 7.48 and 9.87 min respectively for L T5 0; the divided doses of Anopheles sinensis versus deltamethrin were 76.5%, 5 7.0% and 79.0% respectively, which were resistant groups And L T5 0 were 12.0, 15.4 and 11.2 min, respectively. DDT-differentiated dose-wise mortality of DDT was 95.8%, which was the initial resistant population and L C5 0 was 0.73 %; Anopheles sinensis against DDT dose-wise mortality was 44%, high anti-population, L C5 0> 4%. [Conclusion] The insecticides were widely used in paddy fields, which resulted in the resistance of Anopheles sinensis to deltamethrin and DDT. However, no significant resistance to Anopheles anthropophagus was found.