淡色库蚊的生态习性观察

Observation on ecological characteristics of Culex pipiens pallens

目的观察淡色库蚊的羽化、交配、吸血及产卵等行为习性,为评价媒介作用及制定防治措施提供依据。方法在实验室条件下,观察不同时间羽化的淡色库蚊雌雄成蚊比例、交配行为对吸血行为的影响、不同颜色及不同产卵基质对淡色库蚊产卵行为的影响。结果第1天羽化的成蚊中,雄蚊的比例>95%;羽化后的雌蚊分别在第3天和第6天出现2个吸血高峰;未交配雌蚊吸血频率更高,吸血后可正常产卵;羽化后3 d内交配的雌蚊吸血率明显高于羽化后4 d交配的雌蚊;黑色及饲养过淡色库蚊幼虫的水质对雌蚊产卵具有较强的引诱作用。结论阻断交配的防控模式不适合防控淡色库蚊种群,深色和含幼虫体表化合物的水质可应用于淡色库蚊的诱捕装置中。

Objective To observe the blood-feeding and oviposition behaviors of Culex pipiens paUens associated with the reproductive characteristics and to evaluate the vectorial capacity. Methods Observing the adult male and female ratio of different eclosion time, studying the relation between post-mating and blood-feeding of Cx. pipiens pallens and the influence of different oviposition substrate on the mosquito＇ s egg laying behavior. Results The mosquitoes emerged on the first day were almost all males. There were two blood-feeding peaks for females post-eclosion. The blood feeding frequency of non-mated females was higher than the mated females. The feeding frequency of delayed mated females declined. The black color and the water that raised the larvae can attract the gravid females to oviposit. Conclusion The methods to interrupt mating are not suitable for controlling the Cx. pipiens pallens. The black color and the nutritious water could be used to the mosquito＇ s traps.