【摘要】 华北地区室外观贫树种几乎全部受蚧虫为害。其中，花灌木普遍受害，乔木受害不均衡，竹类受害较轻。在室外观赏树秤上为害的蚧虫有６科３８种，以盾蚧科、蚧科、粉蚧科种类为主。最后，给出了以田间识别特征为主的主要观赏树秤蚧虫种类识别检索表。更多还原

【Abstract】 The damage caused by scale insects occurs in outdoor ornamental plants almost ev-erywhere in North China.The extensive attack is found for flower shrubs,comparatively lessserious for bamboos.And for trees,it is different from species to species.There are 38 speciesof the scale insects,most of them belong to Diaspididae,Pseudococeldae and Coccidae,at-tacking outdoor ornamental plants in North China.In this paper,keys to the identification ofthe scale insects are given.更多还原