Yu Bao-Ting, Ding Yan-Mei, Mo Xiao-Chang, Liu Ning, Li Hong-Jie, Mo Jian-Chu
Ministry of Agriculture Key Laboratory of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, 388 Yuhangtang Road, Hangzhou, Zhejiang 310058, China.
Zhejiang Academy of Agricultural Sciences, 200 Shiqiao Road, Hangzhou, Zhejiang 310021, China.
Acta Trop. 2016 Mar;155:51-7. doi: 10.1016/j.actatropica.2015.12.015. Epub 2015 Dec 29.
Adult mosquitoes rely on ingestion of sugar from plants to survive, swarm and mate. Culex pipiens pallens Coguillett is the primary vector of lymphatic filariasis and epidemic encephalitis. Little is known about the effect of feeding on different sugar sources on the survivorship and fecundity of Cx. pipiens pallens. In the present study, newly emerged mosquitoes were exposed to several flowering plant and seed pod species with different olfactory preferences, and the survival times of mosquitoes exposed to these sugar sources were determined. The proportions of mosquitoes that ingested sugar from host plants were investigated by cold anthrone tests. The numbers of eggs per egg raft laid by mosquitoes were compared when they were provided with different sugar sources and one blood meal. The results revealed that feeding on different kinds of sugar sources significantly affected female and male mosquitoes' survival times. Cold anthrone tests indicated that the proportions of sugar-positive mosquitoes from different nutritional regimes within 24h corresponded to the preference rankings of Cx. pipiens pallens to these sugar sources, and rapid declines in the proportions of surviving individuals might be attributed to their insufficient ingestion of sugar from nutritional regimes. Feeding on different sugar sources strongly affected the proportions of engorged mosquitoes, and females that had fed on their preferred sugar sources laid more eggs than mosquitoes provided with less preferred sugar sources. The results would provide insights in developing mosquito control strategies that target the sugar feeding behavior of mosquitoes.
成年蚊子依靠摄取植物中的糖分来生存、聚集和交配。淡色库蚊是淋巴丝虫病和流行性乙型脑炎的主要传播媒介。关于取食不同糖源对淡色库蚊生存和繁殖力的影响，人们了解甚少。在本研究中，将新羽化的蚊子暴露于几种具有不同嗅觉偏好的开花植物和种子荚物种中，并测定暴露于这些糖源的蚊子的存活时间。通过冷蒽酮试验研究摄取宿主植物糖分的蚊子比例。当给蚊子提供不同糖源和一顿血餐时，比较每只蚊子所产卵块的卵数。结果表明，取食不同种类的糖源对雌蚊和雄蚊的存活时间有显著影响。冷蒽酮试验表明，24小时内来自不同营养方案的糖阳性蚊子比例与淡色库蚊对这些糖源的偏好排名相对应，存活个体比例的快速下降可能归因于它们从营养方案中摄取的糖分不足。取食不同糖源对饱血蚊子的比例有很大影响，取食其偏好糖源的雌蚊比取食不太偏好糖源的蚊子产卵更多。这些结果将为制定针对蚊子取食糖行为的蚊虫控制策略提供见解。
