苹果绵蚜(Eriosoma Lanigcrum(Haus Mann))是苹果生产上的重要检疫性害虫。该虫的为害方式是刺吸树干、树枝和根部,在被害处形成肿瘤,破坏寄生组织,造成树势衰弱,产量降低。苹果绵蚜为害后对产量的影响究竟有多大,至今国内外尚无报道资料。为探索这一问题,我们从1986～1989年对 Eriosoma Lanigcrum (Haus Mann) is an important quarantine pest in apple production. The insect damage is the thorn tree trunks, branches and roots, forming a tumor in the victimization, destruction of parasitic tissue, resulting in weak bark, yield reduction. Apple aphid harmful effects on yield exactly how much, so far no information at home and abroad. To explore this issue, we from 1986 to 1989, right