摘要
目的:探讨野外致倦库蚊对球形芽孢杆菌C3-41的抗性。方法:为WHO常规生物测定方法。结果:经连续8年的生物防制,野外致倦库蚊幼虫对球形芽孢杆菌C3-41的抗性水平高达24545倍,但对球形芽孢杆菌LP1-G未表现出抗性,而对苏云金杆菌以色列亚种(B.thuringiensisisraelensis)的敏感性却提高1倍。
Bacillus sphaericus C 3-41 larvicidal formulation has been continuously used to control Culex quinquefasciatus larvae for eight years in Dongguan, Guangdong .It has proved that this kind of formulation has high efficacy against the target larvae in early treatment period. Under the high continuous selective pressure, C.quinquefasciatus developed very high resistance to C 3-41 and the resistance level was calculated to be 24 545 -fold in comparison with the sensible larvae collected from the untreated areas. It also showed that the B.sphaericus LP1-G had the same toxicity against both susceptible and resistant larvae and B.thuringiensis subsp. israelensis was more active to the former than the latter.So we suggested B.thuringiensis israelensis could be used as a promising alternative for controlling the resistant larvae.
出处
《中国媒介生物学及控制杂志》
CAS
CSCD
1999年第2期105-107,共3页
Chinese Journal of Vector Biology and Control
基金
中山大学生物防治国家重点实验室资助项目
关键词
球形芽孢杆菌
致倦库蚊
杀蚊毒性
抗性
Bacillus sphaericus Culex quinquefasciatus Toxicity Resistance