Analysis on the density and ecological habit of the main malaria vector Anopheles in Hubei Province
Objective To understand current changing situation of density and ecological habit such as the fluctuation of populations and change of habitat,blood sucking and breeding sites of the main malaria vector Anopheles in Hubei Province,so as to provide a reference for malaria control before the elimination of malaria.Methods Field investigation was carried out in Jingshan,Guangshui and Zengdu counties to analysize the Anopheles density and ecological habits by per man per hour method,man bait within nets method and light trap method.The data were analyzed with descriptive analysis,variance test and chi-square test.Results Anopheles anthropophagus was not found in the whole 3 survey areas in 2012,and the Anopheles sinensis was the only one found.In the adult Anopheles density survey,the human landing catch density in late August at Jingshan was the highest(7.50/man·h);the man baited within nets density was the highest(0.18/net)in August;and the light trap catch density in July at Guangshui was highest(9.67/night).In the Anopheles sinensis larvae density survey,the A.sinensis larvae density peak was in late August and early September in various counties.Conclusion In the former A.anthropophagus and A.sinensis complex vector area,A.onthropophagus was now rarely found.A.sinensis larvae breeding site was mainly rice field,its larval density decreased in late July,rebounded in August,and declined in September.The seasonal fluctuations of density of A.sinensis larvae and adult were consistent.