摘要
以强迫接触法比较了6种重要媒介蚊虫成蚊对不同浓度顺式氯氰菊酯浸泡的蚊帐的敏感性。结果表明,大劣按蚊(An.dirus)和埃及伊蚊(Ae.aegypti)对各浓度的浸药蚊帐最敏感,白纹伊蚊(Ae.albopictus)次之,而三带喙库蚊(Cx.tritaeniorhynchus),淡色库蚊(Cx.pipiens.pallens)和致倦库蚊(Cx.quinquefasciatus)则较不敏感。浸药蚊帐不但能够杀灭一部分成蚊,从而对人群提供有效的保护作用,而且对触帐后仍然存活的蚊虫的生理活动也产生了一系列更深刻的影响。本项研究表明,接触了亚致死量顺式氯氰菊酯后(以 LT_(50)的时间接触浸药蚊帐)仍存活的大劣按蚊、埃及伊蚊和三带喙库蚊的吸血率明显降低,平均寿命显著缩短;对三带喙库蚊的观察结果表明,接触亚致死量药物后仍存活的雌蚊所产之卵块的散卵率(不成形之卵块)明显增加,其产卵率虽未受明显影响,但卵的孵化率较之对照组则显著降低。
A comprehensive comparison of sensitivities of 6 species of vector mos- quitoes was made with force-contact method to the bed nets impregnated with different concentrations of alphacypermethrin.It showed that Anopheles dirus and Aedes aegypti were on the top level of sensitivity,followed by Aedes albopictus,whereas Culex tritaeniorhynehus,Cx.pipiens pal- lens and Cx.pipiens quinquefaseiatus were of less sensitivities. Besides the toxicities of the nets to the adult mosquitoes,a series of pr- ofound effects of the nets were observed to the physiological activities of mosquitoes which survived the contact with the nets.Asignificant reduction was found in the blood feeding rate,as well as the average longevity, of An.dirus,Ae.aegypti and of Cx.tritaeniorhynchus which survived a sublethal exposure to alphacypermethrin(be contacted with the impreg- nated nets for a period of LT_(50)).The egg production of female Cx.tri- taeniorhynchus,which survived the exposure of sublethal dosage of alpha- dypermethrin,was not affected,but the proportion of scattered eggs in- creased,and the hatching rate of eggs was reduced significantly compa- red with that laid by the control groups.
出处
《医学动物防制》
1991年第3期200-204,共5页
Journal of Medical Pest Control
关键词
浸药蚊帐
顺式氯氰菊酯
寿命
蚊
bednets impregnated with insecticides
alphacypermethrin
mosquitoes
physiological adtivity
longevity
