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球形芽孢杆菌2362株比1593株有较强的杀幼虫活性,影响其毒性的因素主要是蚊虫的食性和水中有机污染物的数量。本文研究了球形芽孢杆菌2362株对致倦库蚊自然种群的毒效。敏感试验是测试球形芽孢杆菌2362株漂浮浓缩制剂对实验室饲养致倦库蚊幼虫的作用,配成一系列浓度的菌液,每一浓度200ml菌液中加入20条早期四龄幼虫,分别于24小
Bacillus sphaericus 2362 has stronger larvicidal activity than that of strain 1593. The main factors affecting its toxicity are the feeding habits of mosquitoes and the amount of organic pollutants in water. In this paper, the toxicity of Bacillus sphaericus 2362 to natural populations of Culex quinquefasciatus was studied. Sensitivity test is to test the effect of floating concentrated preparation of 2362 strains of Bacillus sphaericus on laboratory-borne Culex pipiens quinquefasciatus larvae, and to make a series of concentrations of bacterial liquid. Add 20 early-stage fourth-instar larvae to each concentration of 200ml, 24 small