王坝楚林区落叶松球蚜危害十分严重,主要危害波氏落叶松,其次是马氏落叶松.虫害发生集中分布在海拔2000—2600m间,其中以2310—2600m的海拔区段发生最严重.受害树龄主要为12—16年生(包括苗龄)的落叶松.半阳、半阴坡发生面积分别占虫害总面积56% Wangba Chu forest area larch aphid very serious harm, the main damage to Larix gmelinii, followed by Larix gmelinii. Pests occurred concentrated in the altitude of 2000-2600m, of which 2310-2600m occurred in the most severe section of the altitude The main victims were larch aged from 12 to 16 years (including seedling age) .The occurrence area of ​​Hanyang and semi-shady accounted for 56%