关键词: 蚊虫, 自然种群, 孳生地

Abstract: Objective To find out the types of the breeding places of the mosquito larvae and the distribution characteristics of the natural mosquito population in urban area of Guangzhou.Methods Places where the mosquito larvae were possible to breed in the North,South,East,West and Central part of each administrative region in the urban area of Guangzhou were sampled and investigated.The total and the positive counts were recorded.Results Of the 19 330 possible breeding places investigated,1 546( 8.00%) yielded positive results.The positive rates were higher in the marsh( 25.69%),the basements( 23.70%) and the air-raid shelters( 16.79%).The construction sites,the small-scale ponding and the drainage systems accounted for 82.45% of the total areas under inspection and 79.43% of the total positive counts.In different administrative regions,the proportion of varied breeding places and their positive rates were different.Apart from the secondary water supply systems,the drainage systems and the air-raid shelters,no significant difference was found in the positive rates between the central area and the marginal area.Conclusion The breeding places of the mosquito larvae in the urban area of Guangzhou are diversified and unevenly distributed.The construction sites,the small-scale ponding and the drainage systems are the main breeding places.The small-scale ponding is the most important for Ae.albopictus,while the construction sites and the drainage systems are the most important for Cx.pipiens quinquefasciatus.Control measures should be made on the basis of the actual situation of each administrative region.