黄杨在贵阳地区是主要的庭园观赏植物之一,近年受黄杨绢野螟(Diapania per-spectalis Walker)为害日趋严重。幼龄幼虫取食叶肉,被害叶初期呈黄色枯斑,后至整叶枯萎脱落,四龄以后食量增大,为害更加严重。幼虫还有吐丝结巢的习性,吐丝将树叶及被害后的落叶缀合在一起,致使 Boxwood is one of the major garden ornamental plants in Guiyang. In recent years, Boxwood is increasingly damaged by Diapania per-spectalis Walker. Young larvae feeding on the leaves, the victim leaves early yellowish spot, after the whole leaf withered off, food intake increased after the fourth instar, the damage is more serious. The larvae also have the habit of spinning and knotting nests, spinning together the leaves and the fallen leaves after the victimization, resulting in