紫根病也叫紫纹羽病,是林木上一种严重的根部病害,几乎所有的木本植物都有发生,松、柏、洋槐、杨柳、栎等常有发生。廊坊市近几年造林发展很快,林木面积逐年增加,紫根病也呈多发趋势。该病多发生在苗圃和新植幼林,苗木受害后,引起根部腐烂,造成全树枯死。 1、症状:病害首先发生于幼嫩的新根上,在夏季约一周左右的时间,即引起腐烂,而后扩到侧根和主根。病根表面缠绕 Purple root disease is also called purple pattern feather disease, is a serious root disease on trees, almost all of the woody plants have occurred, pine, cypress, acacia, willow, oak and other common occurrence. Langfang City afforestation developed rapidly in recent years, forest area increased year by year, purple root disease also showed multiple trends. The disease occurred in nurseries and young plantation young, seedlings victims, causing root decay, resulting in dead trees. 1, the symptoms: the disease first occurred in the young new roots, about a week in summer about time, that is caused by decay, and then expanded to the lateral roots and main roots. Wound root surface wound