Abstract:

Objective To explore the status of Culex pipiens molestus infestation in different types of underground garages of Shanghai downtown during winter and spring. Methods Larval sampling was conducted in 4 selected underground garages in Shanghai Huangpu district during December to June. Collected larvae were laboratory-reared until adult emergence, and then identification was attempted by male genitalia morphology. Results Of the 4 underground garages, the crude species composition of Cx. pipiens molestus reached 90.48%, especially in winter and early spring which reached 100% in some garages; as the season changes, this proportion of Cx. pipiens molestus decreased significantly (100% to 67.11%). The proportion of Cx. pipiens molestus in Garage D was significantly higher than the other 3 ones (χ²=24.579, 17.053, and 16.025; P < 0.01). The genitalia DV/D ratio of Cx. pipiens molestus from 4 garages varied significantly (χ²=-0.002, -0.021, 0.004, -0.027; F=19.586, P < 0.05); the maximum value ranged from 0.054 to 0.192. Conclusion Featured with high density of underground garage and high prevalence of underground Cx. pipiens molestus infestation, mosquito control still have a long way to go in downtown Shanghai.

Key words: Culex pipiens molestus, Underground garage, Collecting-well, DV/D ratio

摘要：

目的 对上海市黄浦区地下车库骚扰库蚊在冬春季节的侵害状况进行调查和分析。方法 2013年12月至2014年6月选取黄浦区不同生境、不同车库类型,采集蚊幼虫并实验室饲养,制作雄性尾器玻片后鉴定分类。结果 上海市中心城区冬春季节地下车库环境的骚扰库蚊构成比高达90.48%,部分车库骚扰库蚊达100%;随着季节更替,骚扰库蚊构成比呈明显下降趋势(从100%下降至67.11%);车库D骚扰库蚊构成比高于其他3个车库(χ²=24.579、17.053、16.025;P < 0.01);4个车库的雄蚊阳茎DV/D值为0.054~0.192,差异有统计学意义(χ²=-0.002、-0.021、0.004、-0.027;F=19.586,P < 0.05)。结论 上海市黄浦区地下车库密集,骚扰库蚊侵害现象明显,需引起相关部门重视。

关键词: 骚扰库蚊, 地下车库, 集水井, DV/D阳茎指数