论文部分内容阅读
华山松是我区高山造林的主要树种,从1956年到目前为止,引进并人工造林10万余亩,绝大部份巳经成林。1983～1987年在现场调查,华山松活立木受松树皮象(Hylobius sp.)严重危害,20～27年生华山松林受害株率为85～95％,7～10年生幼林受害株率为78％,对华山松林已构成威胁。作者在芷江、新晃、靖县、淑浦等地调查,发现此虫为害华山松、马尾松、湿地松、火炬松,特别是西南华山松受害十
Huashan pine is the main species of alpine afforestation in our district. From 1956 up to now, more than 100,000 mu have been introduced and planted, most of which have already become forests. From 1983 to 1987, the live walnut trees were severely endangered by Hylobius sp. The damage rate of Pinus densata forest was 20% ~ 85%, while that of 7 ~ 10 years old forest was 78% , The pine forest has become a threat to China. The author in Zhijiang, Sinko, Jingxian, Shu Pu and other places found that pests damage Pinus armandii, Pinus massoniana, Pinus elliottii, Pinus taeda, especially Southwest China pine victims ten