Chapter 5 Migratory and Polyphagous Pest Insects Wu Junxiang可Li Yiping 他. 1003coi▣+ Chapter 5 Chapter 5 Migratory and Migratory and Polyphagous Polyphagous Pest Insects Pest Insects Wu Junxiang Junxiang & Li Yiping Junxw@nwsuaf.edu.cn lyp2003@126.com