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胡杨天幕毛虫属鳞翅目枯叶蛾科,发生于内蒙古西部的额济纳旗,危害面积已达30万亩,其中15万亩是严重受灾区,虫口密度在1万条/株以上,最多的可达10万条/株。在这些林内,胡杨树叶、嫩枝均被吃光,轻则使胡杨生长不良,重则造成大枝干枯,也有少量的老树在严重的虫害下濒于死亡。形态特征成虫:雌蛾体长20毫米,股宽8毫米,触角短羽状,长3—4毫米;翅黄色,前翅中部有一黄褐色带。雄蛾体长16毫米,股宽4—6毫米,触角黄褐色,长8毫米;前翅有两条褐色线,翅上密被淡黄色鳞片,前翅外缘有1毫米宽的褐色绒毛,顶角有3块黑斑,斑长约1.5毫米。卵:白色或灰色,圆柱形,长1毫米,直径0.8毫米,中央凹入,有褐色点,在股内以粘丝连接,丝长2—3毫米。排列在1—2年生的小枝上,呈顶针状。
Populus euphratica is a family of Lepidoptera, which occurs in the Ejina Banner of western Inner Mongolia. The damage area has reached 300,000 mu, of which 150,000 mu is severely affected and the population density is above 10,000 per plant. The most Up to 100,000 / plant. In these forests, Populus euphratica leaves and twigs are eaten light, ranging from poor growth of Populus euphratica, while causing the dry branches, but also a small amount of old trees in the near end of the dead insect pests. Morphological characteristics Adult: Female moth body length 20 mm, width 8 mm, antennae short pinnate, 3-4 mm long; wings yellow, the middle of the front wing with a brown band. Male moth body length 16 mm, width 4-6 mm, tentacles tan, length 8 mm; front wing with two brown lines, the wing is densely yellowish scales, fore wing has a 1 mm wide brown fluff, apex angle There are 3 black spots, spot length of about 1.5 mm. Eggs: white or gray, cylindrical, 1 mm long, 0.8 mm in diameter, concave central, brown spots, glued in the strand with silk, silk length 2-3 mm. Arranged in 1 - 2 years old branchlets, was thimble-shaped.