1. College of Plant Protection, Hebei Agricultural University, Baoding 071001, P. R. China
2. Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engi-neering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
3. Biological Control Center of Plant Diseases and Plant Pests of Hebei Province, Baoding 071001, P. R. China