解放以来,随着祖国林业建设事业的迅速发展,我省广大林区职工和农村社队,响应毛主席“绿化祖国”、“实行大地园林化”的伟大号召,营造了大面积落叶松人工林,大部分已郁闭成林,成为我省重要森林后备资源。但是,由于60年以后发生的落叶松早期落叶病,使大面积落叶松林受到了严重危胁。1973年,这一病害刚刚得到解决, Since the liberation, with the rapid development of forestry construction in our motherland, a large number of forest workers and rural communes and brigades in our province have responded to Chairman Mao’s great call for “greening the motherland” and “practicing the earth garden” to create a large-scale larch plantation , Most of them have closed forests and become important reserve resources in our province. However, large areas of Larch Forests are severely endangered due to the early deciduous larch disease occurring 60 years later. In 1973, the disease was just settled,