中国媒介生物学及控制杂志 ›› 2011, Vol. 22 ›› Issue (4): 336-337,340.

• 论著 • 上一篇    下一篇

洗涤对防虫蚊帐中联苯菊酯残效的影响

吴华, 黄鸿, 刘桂清, 欧剑峰   

  1. 广东省昆虫研究所,广东省野生动物保护和利用公共实验室,广州 510260
  • 收稿日期:2011-04-06 出版日期:2011-08-20 发布日期:2011-08-20
  • 作者简介:吴华(1974-),男,工程师,从事药物合成、分析及应用研究。Email: wu7478@163.com

Residual efficacy of bifenthrin treated mosquito nets for Aedes albopictus after washing

WU Hua, HUANG Hong, LIU Gui-qing, OU Jian-feng   

  1. Guangdong Entomological Institute, Guangdong Provincial Public Laboratory on Wild Animal Conservation and Management, Guangzhou 510260, Guangdong Province, China
  • Received:2011-04-06 Online:2011-08-20 Published:2011-08-20

摘要:

目的 实验室评价标准洗涤对防虫蚊帐中联苯菊酯残效的影响。方法 防虫蚊帐按照WHO标准洗涤程序洗涤不同次数后,以强迫接触法进行击倒率及死亡率的生物测试,以气相色谱法检测蚊帐中联苯菊酯的残留量。结果 随着洗涤次数的增加,击倒率及死亡率均呈快速下降趋势,洗涤15、20次时,平均击倒率下降39.4%和70.0%,平均死亡率下降25.0%和69.7%,表明洗涤次数对蚊帐的残效影响很大;蚊帐中联苯菊酯含量逐渐减少,洗脱方程C=137.3746e-0.0696t,半衰期T1/2=9.97次,R2=0.9868。结论 蚊帐经标准洗涤后联苯菊酯的含量<28.15 mg/m2 则对蚊虫无效果,要取得明显的防蚊效果,蚊帐中联苯菊酯的最终含量必须>42.99 mg/m2

关键词: 联苯菊酯, 标准洗涤, 残效, 白纹伊蚊

Abstract:

Objective To evaluate the residual efficacy of bifenthrin against Aedes albopictus on washed mosquito nets. Methods The knockout and fatality rates of mosquito nets after several WHO standard washing procedures were determined using forced exposure tests. Residues were measured using gas chromatography. Results The knockout and fatality rates decreased sharply as the number of washing increased. At the 15th and 20th wash, the average knockout rate decreased by 39.4% and 70.0% respectively, and the average fatality rate dropped 25.0% and 69.7%, respectively, indicating a significant impact of washing on the effect of agent-treated nets. The residue and degradation of bifenthrin conformed to the first-order kinetics equation: C=137.3746e-0.0696t, T1/2=9.97 times, R2=0.9868. Conclusion After washing, mosquito nets were no longer effective when residual bifenthrin content was lower than 28.15 mg/m2. A final content of more than 42.99 mg/m2 should be ensured to maintain noticeable mosquito control efficacy.

Key words: Bifenthrin, Standard washing, Residual effect, Aedes albopictus

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