沙市城区连续10年应用微生物制剂控制蚊虫的效果评价

Evaluation of Local Microbial Products against Mosquitoes for Ten-years Large-Scale Application in Sha-shi Urban Area

目的：观察10年来主要应用苏云金杆菌以色列变种地方株（B．t－187）控制蚊虫的效果。方法：按WHO推荐的方法，在实验室进行生物测定，以确定B．t－187乳剂使用浓度，然后进行现场灭蚊效果观察。结果：使用效价为380～460国际单位，剂量为1～2ml／m2的B．t－187乳剂能有效控制蚊约和成蚊密度，成蚊平均相对叮咬密度比处理前下降89．4％，并降低了蚊虫的季节性高峰。结论：该生物制剂对按蚊、库蚊、伊蚊幼虫的毒杀效果颇佳，蚊幼尚无产生抗性的迹象。

This paper reports the efficacy of Bacillus thuringiensis var israeleusis 187 for controlling mosquitoes in Sha-shi urban area during 1986 to 1995. The results showed that mosquitoescould be effectively controlled with emulsion of Bacillus thuringiensis var israeleusis 187 at a doseof 1-2ml/m2 once a 10-day interval. As compared with pretreatment. The mean man-biting rate ofmosquitoes was reduced by 89. 4 %.