The paper was ever funded by the Program of Tackle Key Problems in Science and Technology granted by the People’s Government of Qinghai Province;the International Cooperation Items of Shanxi Provincial Program for Scientific&Technological Research and Development,No.2004KW-05;the Initiative Program of Shanxi University of Technology,No.SLGQD0621
funds of the key project"Studies of the IPMTechniques of Some Key Disease and Insect Pests on Spring Wheat";the People’s Government of Qinghai Province