Objective To investigate the population distribution and seasonal fluctuation of mosquitoes,and the insecticide resistance of Aedes albopictus in Wenzhou in 2023.Methods From April to November 2023,mosquito distribution monitoring was conducted in 11 counties(cities and districts)of Wenzhou using light traps across 5 biotopes.The insecticide resistance of A edes albopictus larvae and adults to commonly used insecticides was assessed by larval immersion test and adult contact method,respectively.Results A total of 4 506 female adult mosquitoes were captured in 2023,with the density of 3.76 insects per lamp at one night.The composition of adult mosquitoes was statistically significant in different habitats(x2=874.66,P＜0.001),with the highest density of mosquitoes found in livestock sheds.Culex pipiens pollens was the dominant species,accounting for 70.48％(3 176/4 506).The peak of seasonal mosquito abundance occurred on August 3,with the peak period ranging from June 7 to October 1.The resistance ratios of Aedes albopictus larvae to temephos and propoxur were 7.31 and 4.16,respectively,indicating low resistance.The adult mosquitoes of Aedes albopictus were sensitive to 0.05％propoxur,but showed resistance to 0.4％permethrin.Conclusions The dominant species in Wenzhou is Culex pipiens pollens.Adult mosquitoes show distinct seasonal variations,and mosquito control should be strengthened in habitats such as livestock sheds,parks,and residential areas.Aedes albopictus larvae and adults have developed varying degrees of resistance to commonly used insecticides.
Aedes albopictusMosquitoInsecticide resistanceDensity of mosquitoes
NETL
NSTL
万方数据
