Mosquito monitoring result analysis in Shanghai, 2010—2016

ObjectiveTo ascertain species density and seasonal fluctuation of mosquitoes in Shanghai and to provide the scientific evidence for mosquito control and risk assessment for mosquito-borne disease.

MethodsThe surveillance data on mosquitoes by CO₂ traps were collected from 2010 to 2016.The species composition of different mosquitoes was analyzed and the seasonal fluctuations of different mosquitoes in different habitats were compared.

ResultsThe average captured mosquito density was 1.78 mosquitoes per light trap in 2010-2016, and in the composition of captured Culex pipen pallens and Cx. tritaeniorhynchus, Culex pipen pallens reached 80.3%.The density of captured Cx. pipen pallens was the highest, 1.22 mosquitoes per light trap, followed by Cx. tritaeniorhynchus and Aedes albopictus which were 0.22 and 0.21 mosquitoes per light trap, respectively. The density of captured mosquitoes tended to increase from 2010 to 2016, close to that obtained from livestock, farmyards and green belt around residential areas. The density of As. albopictu was little different in these monitored habitats except for livestock sheds. There was only a peak in July for the seasonal fluctuation tendency of captured mosquitoes, and the density peak of As. albopictu continued from July to September.

ConclusionCx. pipen pallens is the dominant species in human habitats and surroundings in Shanghai. The farmyard and livestock in rural and green belts of residential areas in town are the most important mosquitoes infestation areas, so more attention must be paid to mosquitoes control in these areas.