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我盟位于内蒙锡林郭勒盟草原,气候寒冷、干旱,年平均温度1—3℃,无霜期95—110天,冰冻期长达7个月,年降水量仅200—400毫米,而年蒸发量则大于降水量的8—10倍。土壤贫瘠,表土厚30—45厘米,地下有钙质层。这种自然条件造成了草原造林的不利因素,加上草原上的老残林及灌丛多虫多病,常常蔓延至人工林,引起大片人工林死亡。其中杨树死亡的主要原因,是由于白杨透翅蛾钻蛀树干,引起树势衰退,继之染腐烂病而死。我盟阿巴嘎旗林业工作站,对白杨透翅蛾的发生规律及防治方法进行了四年多的研究,在林业生产中起到了一足作用,现简介如下。
My League is located in Inner Mongolia Xilin Gol League grassland, cold climate, the average annual temperature of 1-3 ℃, frost-free period of 95-110 days, the freezing period of up to 7 months, the annual rainfall of only 200-400 mm, while the annual evaporation is greater than 8-10 times the amount of precipitation. Barren soil, topsoil 30-45 cm thick, underground calcareous layer. This natural condition has created unfavorable factors for afforestation on the prairie. In addition, the old remnants of forests and shrubs in the grasslands became sickly and often spread to plantations, causing the death of large-scale plantations. Among them, the main reason for the death of poplar stems from the fact that the poplar moth drills the trunk of the tree and causes the decline of the tree vigor, followed by the rot of the tree. The Abba Gap Forestry Station of our Union conducted more than four years of research on the occurrence and prevention methods of poplar moth and played a role in forestry production. The brief introduction is as follows.