*Correspondence:
Prof. Pei Liang
Department of Entomology
China Agricultural University
2 YuanmingyuanWest Road
Beijing 100193, China
Phone: (86) 10-6273 1306
Fax: (86) 10-6273 1306
Email: liangcau@cau.edu.cn
Prof. Xiwu Gao
Department of Entomology
China Agricultural University
2 YuanmingyuanWest Road
Beijing 100193, China
Phone: (86) 10-6273 2974
Fax: (86) 10-6273 2974
Email: gaoxiwu@263.net.cn