By means of the slide dip method recommended by FAO,the baseline of Tetranychusviennensis Zacher to 13 kinds of insecticdes and mitecides were estabilished, according to the suscepti-ble strain of the mite on peach trees in Lanzhou Teacher College campus.

• 本文采用FAO（国际粮农组织）推荐的玻片浸渍法，以兰州师专校园内桃树上的山楂叶螨（TetranychusViennensisZacher）为敏感品系，建立了山楂叶螨对13种杀虫杀螨剂的敏感毒力基线。