Ke ZhouJikun HuangXiangzheng DengWerf, A.W. van derZhang, WeiYanhui LuKongming WuFeng Wu2015-10-022015-10-02https://hdl.handle.net/10568/68415Effects of land use and insecticides on natural enemies of aphids in cotton: First evidence from smallholder agriculture in the North China Plain