Trends in insecticide resistance in Culex pipiens pallens over 20 years in Shandong, China
Abstract Background Culex pipiens pallens is the most abundant Culex mosquito species in northern China and is an important vector of bancroftian filariasis and, potentially, West Nile virus.Insecticides, particularly pyrethroids, are widely used for adult mosquito control.Insecticide resistance has become common in several mosquito species, and ve