自1978年三北防护林工程启动以来,沙柳一直被作为陕西省榆林风沙区最主要的绿化及防风固沙树种。目前,榆林风沙区沙柳分布面积约有500多万亩,对于当地防风固沙、水土保持、遏制沙尘暴起着重要的作用。但是由于沙柳生长环境恶劣,且大多为人工纯林,加上连续多年干旱和气候变暖,群众没有及时进行平茬抚育,致使沙柳林龄老化,长势衰弱,沙柳毒蛾危害甚大。 Since 1978, the Three North Shelterbelt project started, Salix has been used as the Yulin sandstorm area in Shaanxi Province, the most important greening and windbreak sand species. At present, the distribution area of ​​Salix in Yulin Sandy Area is about 500 million mu, which plays an important role in local wind-sheltering, soil and water conservation and dust storms prevention. However, due to the harsh growing environment of Salix psammophila, most of which are artificial pure forests, and the continuous years of drought and climate warming, the masses did not raise the stubble in time, resulting in the aging of Salix psammophila and the weakening of Salix psammophila.