1972年以来,我们大队营造杉、檫用材林1000多亩,大部分生长良好,有的已经郁闭成林。但是自去年起,先后发现杉木叶枯病和红蜘蛛等病虫危害杉木幼林,情况比较严重,特别是红蜘蛛来势很猛,给杉木速生成林带来了威胁。今年,我们对杉木叶枯病、红蜘蛛进行了防治,取得了较好的效果。 Since 1972, our brigade has built 1,000 hectares of fir and timber forests, most of which have grown well and some have been closed to forested lands. However, since last year, it has been discovered that the diseases and diseases such as Chinese fir blight and spider mite are more serious than the young plants damaged by Chinese fir. Especially the spider mites are very fierce, posing a threat to the fast-growing Chinese fir plantation. This year, we have carried out prevention and control of Chinese fir leaf blight and red spider and achieved good results.