Vijayan V A, Revanna M A, Vasudeva K S, Pushpalatha N
Department of Studies in Zoology, University of Mysore.
Indian J Med Res. 1993 Sep;97:215-7.
Larval populations of Culex tritaeniorhynchus and C. fuscocephala from Mysore city were tested for their susceptibility against two pyrethroids viz., cypermethrin and deltamethrin and four organophosphorus (OP) compounds viz., fenthion, fenitrothion, temephos and malathion. The investigations revealed that, among the pesticides tested, efficacy of pyrethroids was very high as compared to OP compounds. C. tritaeniorhynchus was found to be highly tolerant to all the insecticides used. It registered 4.0, 6.5, 17.0, 6.5, 14.0 and 1.5 times more tolerance than C. fuscocephala to cypermethrin, deltamethrin, fenthion, fenitrothion, temephos and malathion respectively in terms of the LC50 value. Further studies are needed to determine the development of resistance if any, by C. tritaeniorhynchus, an important JE vector in Karnataka.
对来自迈索尔市的三带喙库蚊和棕头库蚊幼虫群体进行了测试，以检测它们对两种拟除虫菊酯（即氯氰菊酯和溴氰菊酯）以及四种有机磷（OP）化合物（即倍硫磷、杀螟硫磷、双硫磷和马拉硫磷）的敏感性。调查显示，在所测试的杀虫剂中，拟除虫菊酯的效果与有机磷化合物相比非常高。发现三带喙库蚊对所有使用的杀虫剂具有高度耐受性。就半数致死浓度（LC50）值而言，它对氯氰菊酯、溴氰菊酯、倍硫磷、杀螟硫磷、双硫磷和马拉硫磷的耐受性分别比棕头库蚊高4.0倍、6.5倍、17.0倍、6.5倍、14.0倍和1.5倍。需要进一步研究来确定作为卡纳塔克邦重要的日本脑炎传播媒介的三带喙库蚊是否产生了抗药性。
