Chapter 18 Integrated Pest Management of Cotton.Hemp.Tobacco and Beets Wu Junxiang Li Yiping Junxw@nwsuaf.edu.cn yD2003@126.comChapter 18 Integrated Pest Management of Cotton, Hemp, Tobacco and Beets Wu Junxiang Junxiang Li Yiping Junxw@nwsuaf.edu.cn Junxw@nwsuaf.edu.cn lyp2003@126.com lyp2003@126.com