1. College of Plant Protection; Shenyang Agricultural University; Shenyang Liaoning 110866 China
2. School of Life Sciences; Chongqing University; Chongqing 400045 China
3. Division of Plant Protection, Department of Crop Sciences; University of Natural Resources and Life Sciences Vienna; Vienna 1190 Austria
4. Alberta Plant Health Laboratory, Alberta Agriculture and Forestry; Edmonton Alberta T5Y 6H3 Canada