根癌病的病原菌为根癌土壤杆菌。根据细菌学特性分为生理Ⅰ型、Ⅱ型、Ⅲ型三种。其中,葡萄根癌病菌为生理Ⅲ型,而苹果、桃、樱桃、梨、梅、杏、无花果、榅椁、木瓜等果树;月季、贴梗海棠、菊花等花卉的根癌病菌是生理Ⅰ型和Ⅱ型。一般,葡萄以外的果树根癌病是在根颈部形成癌肿,而葡萄的苗木和幼树是在嫁接部位周围形成癌肿,随着树龄的增加,在主枝、副主枝、侧枝、结果母枝、新梢也形 The root cause of pathogenic bacteria is Agrobacterium tumefaciens. According to the bacteriological characteristics of physiological Ⅰ, Ⅱ, Ⅲ type three. Among them, the grape root nodule pathogen is physiological type Ⅲ, while the apple, peach, cherry, pear, plum, apricot, fig, emu, papaya and other fruit trees; And type Ⅱ. In general, the fruit tree outside the grapes is a cancer of the root and neck cancer formation, and grape seedlings and saplings are formed around the graft site of cancer, with the increase of age, in the main branch, the main branch, collateral, Results mother, shoots are also shaped