近年来大白菜根肿病发生逐年加重,现将其症状及防治技术介绍如下。根肿病在大白菜幼苗期和成株期均可发生,主要危害根部,造成主根或侧根出现大小不等,形似手指状、短棒状或球状的瘤。主根上的瘤靠近地上部,发病初期瘤体表面光滑,后期表面粗糙、凹凸不平,明显龟裂,须根上的瘤多达20个,串生在一起。病株根系的生理机能受 In recent years, cabbage clubhead disease increased year by year, now its symptoms and prevention techniques are described below. Clubroot disease can occur in Chinese cabbage seedling stage and adult stage, and mainly endanger the root, causing the size of the main root or lateral root to appear like fingers, short rod or spherical tumor. On the main root of the tumor near the ground, early onset of smooth surface of the tumor, the latter rough surface, uneven, obviously cracked, fibrous fibrous roots on up to 20, string together. Physiological function of diseased plants roots