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哈密地区干旱少雨,为了防风固沙、调节气候、保护农牧业生产并解决城乡建设对木材的需求,十分重视农田防护林的建设、杨柳树适应性强、生长迅度、防护效益、经济效益显著,因而是平原地区防护林的主要造林树种。可是近几年杨柳蓝叶甲为害严重,使许多防护林一片焦黄,树木生长衰弱甚至死亡。据1983年调查,仅哈密市为害面积就达2680公顷,死亡树木5万余株,每年损失木材(生长量)达5千立方米,折人民币100多万元。
Hami area is arid and dry. In order to prevent wind and sand, regulate climate, protect agriculture and animal husbandry production and solve the demand for timber in urban and rural construction, attaches great importance to the construction of farmland shelterbelt. Willow tree has strong adaptability, rapid growth, protection benefit, significant economic benefits, It is the main afforestation tree species in the plain area shelterbelt. However, in recent years, the serious damage to willow blue leaf armor, so that many shelter forest a yellow, weak growth of trees or even death. According to a survey conducted in 1983, only the area damaged by Hami amounted to 2,680 hectares and 50,000 trees were dead, with an annual loss of 5 thousand cubic meters of wood (amount of growth) and a loss of over 1 million yuan.