近２０年来，我国桃树面积和产量迅速增长，栽培区域明显扩大，但目前，根癌病的发生已成为影响桃树生产的重要障碍。据华北地区调查，一般果园发病株率为３０％～５０％，严重的达１００％。因此，加强管理，积极预防和防治桃根癌病已成为桃树栽培的重中之重。一、症状桃树根 In the past two decades, the area and output of peach trees in our country have been rapidly increasing, and the cultivated areas have obviously expanded. However, the occurrence of root-knot diseases has become an important obstacle to peach tree production. According to a survey conducted in North China, the average incidence of orchards in the orchards is 30% to 50% and seriously to 100%. Therefore, to strengthen management, actively prevent and control peach root cancer has become the top priority of peach cultivation. First, the symptoms of peach root