江苏省家蝇抗性及防制对策的研究

Studies on Resistance of House flies and the Controlling Strategies in Jiangsu Province

目的 :采取综合防制措施 ,有效降低蝇密度 ,轮换或混合使用杀虫剂 ,使家蝇抗性得到控制 ,从而提高杀虫剂灭蝇效果。方法 :建立家蝇抗性监测网 ,用点滴法测定家蝇对常用杀虫剂的抗性变化情况。结果 :江苏省1997～ 1999年抗性调查结果敌敌畏、二氯苯醚菊酯、溴氰菊酯LD50 ( μg/只 )分别为0 .185 4、0 .0 40 9、0 .0 0 77,分别是 1982～ 1985年和 1991～ 1992年的 3 .94、1.0 3、4.6 5、1.98倍和 7.0 0、3 .5 0倍。氯氰菊酯抗性监测连续 5年LD50在 0 .0 395 0～ 0 .0 774μg/只之间。 结论 :为合理使用杀虫剂及开展综合防制 ,提高灭蝇效果 。

Objective: The resistances of house flies could be controlled by the way of the comprehensive controlling measures and the changed or mixed employment of insecticide, And then the effect of insecticide could be enhanced. Methods: The surveillance net has been built, and the changes of resistance on flies to insecticide were measured by dropping-test-way. Result:According to the data of resistance on flies form 1997 to 1999,it was observed that LD 50 of DDVP,permethrin, deltamethrin were 0.185 4 , 0.040 9 , 0.007 7 (μg/per.insect) respectively, Which was 3.94 , 1.03 , 4.65 , 1.98 times higher than that of the years from 1982 to 1985, 7.00 and 3.5 times higher than that of the years from 1991 to 1992. LD 50 of cypermethrin to house flies were varied from 0.039 0 to 0.077 4 μg per-insect at the basis of cypermethrin resistances surveillance on fly. Conclusion:It was indicated that rational employment of insecticides could enhance effects on house flies and inhibit or delay developing of the resistances on house flies.