果树根癌病是一种世界性的病害 ,我国各果品产区均有分布 ,特别是苗木受害较重 ,该病寄主范围很广 ,约有 30 0多种。主要为害苹果、梨、桃、葡萄、板栗、杏、李、红果、杨、柳等多种果树和林木。1　症状病菌主要侵害寄主的幼苗和根颈部 ,有时也发生在根的其它部分 ,发病初期 , Fruit tree root cancer is a worldwide disease, the distribution of all fruit production areas in our country, especially the heavy damage of seedlings, the disease host a wide range of about 30 0 kinds. The main damage to apples, pears, peaches, grapes, chestnuts, apricot, plum, red fruit, poplar, willow and other fruit trees and trees. 1 Symptoms Bacteria mainly affect the host’s seedling and root neck, and sometimes also occurs in other parts of the root, the onset of disease,