Mosquito monitoring in Liaoning Province in 2021

WANG Chunyu; BAI Yuyin; DING Jun

doi:10.19821/j.1671-2781.2023.05.008

Abstract：Objective To understand the density,species composition and seasonal fluctuation of mosquitoes in Liaoning Province in 2021,so as to provide scientific basis for mosquito control.Methods Mosquito monitoring was carried out in 14 cities of Liaoning from May to October 2021 using the mosquito trap method twice a month,and the data were statistically analyzed with Excel 2010 and SPSS 23.0 software.Results In 2021,the total average density of mosquito was 42.72 mosquitoes/(light·night)in Liaoning Province.Aedes dorsalis was the dominant species,accounting for 35.37%of the total captured,followed by Culex pipiens pallens(23.85%),Anopheles sinensis(19.57%)and Aedes vexans(10.40%).The highest mosquito density was 154.75 mosquitoes/(light·night)in livestock sheds,and the lowest was 5.50 mosquitoes/(lamp·night)in residential areas.Among the mosquito density surveillance sites in the province,Yingkou held the highest density as 190.67 mosquitoes/(lamp·night),followed by Panjin as 59.32 mosquitoes/(light·night),while Dalian held the lowest as 2.10 mosquitoes/(light·night).The seasonal fluctuation trend of mosquito density showed a bimodal curve with one peak,104.55mosquitoes/(light·night),in early June,and the other peak,81.61 mosquitoes/(light·night),in early August.There was a statistical difference in the seasonal variation of mosquito density among habitats(χ2=24.230,P＜0.05).Conclusion This study helps to gain a better understanding of the species composition,density and seasonal fluctuation of mosquitoes in Liaoning Province.It is suggested that targeted comprehensive control measures should be taken according to the surveillance results.