致乏库蚊对八种常用杀虫剂的抗性监测及防制对策

Resistance Monitoring of Culex pipiens quinquefasciatus to Eight Pesticides and Correspongding Control Statics

目的 为调查温州市等地现场致乏库蚊对敌敌畏等 8种常用杀虫剂的抗性动态 ,以制订适宜的防制对策和相应的措施 ,指导灭蚊工作的深入开展。方法 药液浸渍法 (WHO推荐方法 ) ,测定Ⅳ龄期幼虫半数致死浓度。结果现场致乏库蚊对敌敌畏、巴沙、三氯杀虫酯、二氯苯醚菊酯、溴氰菊酯 5种常用杀虫剂的抗性倍数依次为 :温州市 :3 .5 3、1.5 8、2 .91、8.66、4.67;绍兴市 :3 .5 0、1.67、1.61、6.69、5 .3 3 ;衢州市 :5 .3 5、3 .2 3、2 .5 9、6.72、2 .5 3 ;金华市 :3 .5 3、3 .0 2、2 .75、12 .10、4.0 0 ;现场致乏库蚊对敌敌畏、巴沙、三氯杀虫酯、二氯苯醚菊酯、溴氯菊酯、DDT、右旋丙烯菊酯、高效氯氰菊酯等 8种常用杀虫剂的抗性倍数依次为 :湖州市 :3 .78、3 .0 6、1.5 4、5 .15、9.0 0、1.2 5、3 .2 7、2 .62 ;嘉兴市 :4.2 4、3 .43、1.2 7、5 .3 2、11.0 8、1.2 7、3 .2 0、2 .75。结论 现场致乏库蚊对 8种常用杀虫剂均产生了不同程度的抗性 ,尤以二氯苯醚菊酯和溴氰菊酯为最高。

Objective This experiment was carried out to investigate the resistance of Culex pipiens quinquefasciatus Say to eight pestsides and make the corresponding control statics. It was very important to control and prevent Cx.pipiens quinquefasciatus Say. Methods LC 50 of eight commercial pesticids were measured on the fourth instar larvae by larva soaked method (recommended by WHO). Results The resistance ratios of Cx.pipiens quinquefasciatus to DDV,Bassa, Acetofenate, Permethrin and Deltamethrin were 3.53, 1.58, 2.91, 8.66, 4.67 for Wenzhou; 3.50, 1.67, 1.61, 6.69, 5.33 for Shaoxing; 5.35, 3.23, 2.59, 6.72, 2.53 for Quzhou; 3.53, 3.02, 2.75, 12.10, 4.00 for Jinhua; The resistance ratios of Cx.pipiens quinquefasciatus from different cities to DDV,Bassa, Acetofenate, Permethrin, Deltamethrin, DDT, D-allethrim and beta-cypermethrin were 3.78, 3.06, 1.54, 5.15, 9.00, 1.25, 3.27, 2.62 for Huzhou; 4.24, 3.43, 1.27, 5.32, 11.08, 1.27, 3.20, 2.75 for Jiaxing. Conclusion The results showed that Cx.pipiens quinquefasciatus has developed resistance to the eight tested pestsides, especially to Permethrin and Deltamethrin.