Abstract:

Objective To investigate the species， density and distribution of the overwintering adult mosquitoes in Taibaihu District， Jining City. Methods The overwintering adult mosquitoes were monitored by visual observation in Taibaihu District， Jining City from December 2015 to March 2016. The mosquitoes were collected and dissected to observe the body fat accumulation and ovarian development situation. Results Totally 1 677 mosquitoes were captured and all of them were Culex pipiens pallens. The highest positive rate of overwintering mosquitoes was in sweet potato cellars and greenhouses， with the positive rates of mosquitoes of 98.25% （56/57） and 81.36% （48/59） respectively. The accumulation of the fat body in the female mosquitoes plummeted from late February， and disappeared in middle March. Conclusions The adults of Culex pipiens pallens can overwinter in Taibaihu District， Jining City， and locate in sweet potato cellars and greenhouses mainly. The control work of adult mosquitoes should be strengthened in the overwintering period.

Key words: Adult mosquito； Overwintering； Mosquito density； Jining City

摘要：

目的 调查济宁市太白湖新区越冬蚊的种类、密度及分布情况。 方法 于2015年12月至2016年3月，在济宁市太白湖新区选取成蚊监测点采用目测法观察蚊虫数量并记录结果，同时捕捉成蚊在解剖镜下分类鉴定并观察吸血情况。随机选取50%进行解剖，观察蚊虫体内脂肪体累积和卵巢发育情况。 结果 共捕获成蚊1 677只，均为淡色库蚊。蚊虫越冬以地瓜窖、花房较多，成蚊阳性率分别为98.25%（56/57）和81.36%（48/59）。雌蚊2月下旬体内脂肪体骤减，3月上旬开始出现吸血和卵巢发育，3月中旬体内脂肪开始消失。 结论 济宁市太白湖新区淡色库蚊以成蚊越冬，主要越冬场所为地瓜窖、花房，应在越冬期加强成蚊的控制工作。

关键词: 成蚊；越冬；蚊虫密度；济宁市