摘要
建德市有松林面积 5.57 万hm2 ，占有林地面积的 35.6%，占总蓄积的 46.7%。近几年，枯死松树日趋严重，已影响自然景观和生态平衡，经多年调查研究表明，主要原因是松毛虫为害、高虫口松褐天牛、超强度割脂和日本松干蚧传入等因素造成，必须采取相应措施才能遏制。
There are 55,700 hectares of pine forest in Jiande, Zhejiang province, which is 35.8% of forest land, 46.7% of the total volume. In recent years, more and more withered pines have affected natural landscape and ecological balance. Several years' investigations and studies showed that the main causes were damaged by Dendrolimus spp, high density of Monochamus alternatus, over which needed to be controlled.
出处
《浙江林业科技》
2001年第4期84-86,共3页
Journal of Zhejiang Forestry Science and Technology
