ABSTRACT
Objective To investigate the density seasonal fluctuation and insecticide resistance of Anopheles sinensis in the Taibai Lake area and to provide a scientific basis for formulation of Anopheles sinensis control strategy.Methods The surveillance was carried out from June to October in 2013-2016.The adult mosquito density was monitored using human bait trapping method.WHO bioassay method was used to measure the sensibility of mosquitoes to insecticides.Results In 2013-2016,totally 2 318 Anopheles sinensis were captured,the Anopheles sinensis peaked in late July till early August,which were 67-127,317-386,77-89,107-139,respectively.Anopheles sinensis showed high resistance to dichlorodiphenyltrichloroethane,malathion,and initial resistance to propoxur and deltamethrin (mortality ratio:38.10％,41.82％,86.11％,83.02％).Conclusions The Taibai Lake area has a diverse Anopheles sinensis population,its seasonal fluctuations and insecticide resistance monitoring can provide effective guidance for malaria control.In order to prevent the development of resistance to the insecticides,integrated management measures should be adopted in the future.
ABSTRACT
Objective To investigate the species,density and distribution of the overwintering adult mosquitoes in Taibaihu District,Jining City. Methods The overwintering adult mosquitoes were monitored by visual observation in Taibaihu District, Jining City from December 2015 to March 2016. The mosquitoes were collected and dissected to observe the body fat accumula?tion and ovarian development situation. Results Totally 1 677 mosquitoes were captured and all of them were Culex pipiens pal?lens. The highest positive rate of overwintering mosquitoes was in sweet potato cellars and greenhouses,with the positive rates of mosquitoes of 98.25%(56/57)and 81.36%(48/59)respectively. The accumulation of the fat body in the female mosquitoes plummeted from late February,and disappeared in middle March. Conclusions The adults of Culex pipiens pallens can over?winter in Taibaihu District,Jining City,and locate in sweet potato cellars and greenhouses mainly. The control work of adult mosquitoes should be strengthened in the overwintering period.