编辑同志:我最近下乡看到群众性林木育苗在农村广泛开展起来了,所育树种绝大部分都是落叶松,并且大多数苗木长势也较好。但也有许多育苗地的苗木,发生了落叶松枯梢病。这些发病的苗木,既有当年生的播种苗,又有多年生的移植苗,还有一些造林后的幼树。这种病害是由落叶松球座菌侵染而造成的,多在6月中旬发病,7～8月间显现症状,到9月初症状明 Editor’s Comrades: Recently, I went to the countryside to see that mass tree seedling was widely launched in rural areas. Most of the tree species under cultivation were larch trees and most of the seedlings grew better. But there are also many nursery seedlings, the occurrence of Larix blight disease. These emerging seedlings, both the current planting seedlings, there are perennial transplant seedlings, there are some young trees after afforestation. This disease is caused by the infection of L. Vesicola, mostly in mid-June onset, symptoms appear between July and August, early in September symptoms