果树根癌病及其防治朵建果，陶秀云，魏伯华（保定市农林局）果树根癌病又叫果树根瘤病、根肿病、冠瘿病，是果树的一种重要病害。病原菌是一种短杆状具极生鞭毛的细菌，可侵染６０多科３００多种植物，主要寄主有山楂、苹果、葡萄、梨、桃、杏、柿子、樱桃、核桃、板栗等... Fruit tree root cancer and its prevention Dujian Guo, Tao Xiuyun, Wei Bohua (Baoding Agriculture and Forestry Bureau) Fruit tree root disease known as fruit tree root nodule disease, clubroot disease, crown gall disease, is an important disease of fruit trees. The pathogen is a short rod-shaped strain of polar flagella that can infect more than 300 plants in more than 60 families. The main hosts are hawthorn, apple, grape, pear, peach, apricot, persimmon, cherry, walnut, chestnut and so on. .