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落叶松早期落叶病为我国东北地区落叶松人工林的主要病害.我省从一九六○年左右先后在长春、吉林、通化等地发现该病,以后发病面积逐年扩大,至今几乎全省所有落叶松人工林均有该病发生,影响着林木生长.历年发病严重的林分,林木树高、胸径、材积年生长量均减少50%左右,甚至有的死亡.所以对早落病进行防治是保证林木速生丰产,巩固现有造林成果的重要措施. 沈阳林业土壤研究所、辽宁省林业科学研究所从一九五八年开始,对该病进行了试
Early larch deciduous disease is the main disease of larch plantation in the northeast of our country.It was discovered in Changchun, Jilin, Tonghua and other places by our province in about 1960, and the area of disease incidence expanded year by year, Larch plantation have the disease occurred, affecting the growth of trees.In recent years serious disease of the forest, tree height, DBH, annual volume growth volume decreased by about 50%, and even some death. Is to ensure fast-growing forest yield and consolidate the existing afforestation an important measure.Shenyang Institute of forestry and soil, Liaoning Provincial Forestry Science Institute from 1958 onwards, the disease was tested