近几年来,在各地苗圃所培育的杨、柳、国槐及泡桐等,常因腐烂病的侵害,而受到极大的损失,直接影响造林任务不能很好完成。为了引起大家对它的认识和从速防治,特将这几种苗木所发生的腐烂病病征及防治法,简单地介绍如下:杨柳腐烂病本病自1955-1958年先后发生在内蒙、东北及河北省广大的地区。多侵害3-5年生的幼龄树,7年生以上树受害较 In recent years, poplar, willow, Sophora japonica and Paulownia cultivated in nurseries all over the country have suffered tremendous losses due to the detritus diseases, and the direct impact on the afforestation tasks can not be accomplished well. In order to arouse people’s awareness of it and to prevent and treat it as soon as possible, we will briefly introduce the following diseases and signs of the diseases that occur in these nursery stocks: The Willow Rot Disease The disease occurred successively in Inner Mongolia, Northeast China and Hebei Province from 1955 to 1958 The vast area of ​​the province. More infested 3-5 year-old young trees, trees more than 7 years old victims