杀虫剂处理衣服对伊蚊和蚋防护效果观察

Effect of permethrin and deet as clothing treatment protection against Aedes vexans and Simulium venustum

目的研究氯菊酯以及氯菊酯与避蚊胺复配的杀虫剂处理衣服对刺扰伊蚊和班布蚋的防护效果。方法用2种剂量的药物浸泡迷彩服,通过强迫接触法进行击倒时间的观察;用2种剂量的药物浸泡蚊帐,并设空白对照,在野外通过人帐诱法,观察其防护效果;在野外穿着药物处理过的服装观察对蚊、蚋的防护效果。结果强迫接触试验中对班布蚋的击倒时间剂量1的KT50为2.110 min,剂量2的KT50为2.760min,对刺扰伊蚊的击倒时间,剂量1的KT50为6.826 min,剂量2的KT50为7.757 min;人帐诱试验剂量1对蚊蚋的防护效果为88.17%～88.64%,剂量2对蚊蚋的防护效果为92.90%～93.26%;在野外防护效果试验中,穿着实验室浸泡的衣服,剂量1对蚊、蚋的保护率为84.51%～92.19%,剂量2对蚊、蚋的保护率为90.14%～95.31%,现场对衣服进行喷雾,剂量1对蚊、蚋的保护率为91.55%～95.31%,剂量2为94.37%～96.89%。结论用0.80%的氯菊酯以及0.50%氯菊酯和5.21%避蚊胺复配药物2种剂量浸泡衣服或使用前对衣服进行喷雾,在野外活动时都能有效地防护刺扰伊蚊和班布蚋的叮咬。

Objective To determine the personal protection effect of permethrin and a mixture containing permethrin and deet as a clothing treatment.Methods Mosquitoes were divided into two groups,treatment A with 0.80%permethrin and treatment B with a mixture containing 0.50%permethrin and 5.21% deet.Aedes vexans and Simulium venustum were exposed compulsorily to contact with military uniform treated with two different dosage treatment insecticide,for knockdown test respectively.The two dose insectidide treated nets were used to assay the protection effect through men-net-bait.Subjects wearing insecticide treated clothing stood outside to assay the protection effect.Results The KT50 in Simulium venustum and Aedes vexans was 2.110,6.826 min for treatment A,and 2.760,7.575 min for treatment B respectively.The protection in men-net-bait ranged from 88.17% to 88.64% for treatment A,and from 92.90% to 93.26% for treatment B.The protection as wore toxicant immersing treated clothing ranged from 84.51% to 92.19% for treatment A,and from 90.14% to 95.31% for treatment B,and as pressurized sprays on clothing in the field test was 91.55%-95.31% for treatment A,94.37%-96.89% for treatment B respectively.Conclusion Both A and B treated nets or clothings provide a good effect to protect against Aedes vexans and Simulium venustum.