关键词: 蚊虫, 监测, 控制

Abstract:

Objective To gain an insight into the mosquito species, their density and their growth and decline with different monitoring methods. To understand their distribution patterns, and the dominat mosquito species obtained with different monitoring methods, in order to provide relatively accurate early warning information for the proper implementation of mosquito density monitoring and effective control and prevention of Japanese encephalitis(JE) and other vector-born diseases. Methods The “National Vector Biological Monitoring Program (trial)” issued by the Ministry of Health of P.R. China was used as a guideline for the investigation and monitoring. Results The Results of mosquito larvae density monitoring showed that the positive rate of the idle containers was highest from July to September every year. Of the idle containers the container index (CI) was 36.83%, the housing index (HI) was 34.86% and breteau index (BI) was 24.14. The light trap method, human induced method and mosquito and oviposition trap method were employed to investigate the prevalence of mosquitoes in Baoji city and some of its urban counties from 2006 to 2009. The findings showed that the mosquitoe species acquired were closely related to the ecological environment where they bred and the monitoring Methods used. The types of mosquitoes acquired with different monitoring Methods and in different ecological environments were different. The largest number and types of mosquitoes was obtained with the light trap method, with Culex pipiens pallens (58.82%) being the dominant species, and the mosquitoes obtained by human induced method were mainly Aedes albopictus (77.09%). Those acquired with the capture method were dominantly Cx. tritaeniorhynchus and Armigeres subalbatus, which accounted for 60.94% and 22.21% respectively. The mosquito Cx. pipiens pallens was dominant in urban, and rural residential areas and farming and aquaculture areas accounting for 90.00%, 40.45% and 70.05% respectively, with the mosquito Ae. albopictus being the major species (36.80%) in special places. In terms of the time distribution, it was in August that the mosquito density reached its peak in Baoji. Conclusion It is seen that the types of mosquitoes acquired with different monitoring Methods are different, indicating that it is advisable that proper choice of the monitoring Methods is exercised to avoid bias in routine monitoring. It is desirable that the anti-mosquito measures be taken in April and May befor the peak mosquito densities, in order to reduce the occurrence of mosquito-borne diseases in Baoji.

Key words: Mosquito, Monitoring, Control