Abstract: The experiment on the emulsion of Bacillus sphaericus (C_3-41) on larvae of Culex pipiens pallans was carried out in laboratory. The result showed that its LC₅₀ was 0.0237 ppm, and equation of regression is Y=8.3337%+2.0530X. In the fieldtest, the effects could be lasting for 7 days while the dose of the agent was 1.0 ml/m², and lastiag 2 weeks it the dose was added to 3.0 ml/m². The agent haveno killing effects for mosquito's egg and pupa.

摘要： 采用球形芽孢杆菌C_3-41制剂处理淡色库蚊幼虫,实验室测试LC₅₀为0.0237ppm,回归方程式y=8.3337+2.0530x。现场试验结果表明,使用剂量为1ml/m²时持效7天,3ml/m²时持效2周以上。但该制剂对其卵和蛹无杀灭作用。

关键词: 淡色库蚊幼虫, 球形芽孢杆菌C_3-41