一、天幕毛虫对胡杨的危害天幕毛虫发生于内蒙西部的额济纳旗境内,危害面积已达30万亩,严重受灾面积达15万亩。虫口密度在一万头/株以上,最多的可达10万头/株。在这些林内,胡杨树叶先被吃光,接着嫩枝、叶柄也被吃光,吃不完的也被咬断落在树冠下。在枝叶繁茂 First, the damage of the cemetery caterpillars against Populus euphratica The cemetery caterpillars occurred in the territory of Ejin Banner in western Inner Mongolia, the damage area has reached 30 million mu and severely affected area of ​​15 million mu. Insect population density of 10,000 / plant above, up to 100,000 / plant. In these forests, the leaves of Populus euphratica are eaten first, then the shoots are peeled, the petioles are also eaten, and the eaters are bitten off under the canopy. Lush foliage