杉树是我国的特产,为国家建设主要的速生用材树种之一。解放后杉林营造有了很大的发展,特别是近几年来,大面积的杉木用材林基地在南方各省蓬勃地发展起来。但随着杉林的发展,病虫害也相应地增多,尤以双条杉天牛的为害,不少地方已严重到阻碍杉林的发 Cedar is a specialty of our country, one of the major fast growing timber species for the country. After the liberation of the fir forest has made great development, especially in recent years, a large area of ​​fir timber forest base in the southern provinces flourished. However, with the development of Cunninghamia, pests and diseases also increased correspondingly, especially the damage caused by Cunninghamia lanceolata, and in many places, it has seriously hindered the development of Cunninghamia lanceolata