春尺蛾(Apocheima cinerarius Erschoff)又名沙枣尺蛾、柳尺蛾、杨尺蛾等,是一种食性杂、分布广、为害严重的食叶性害虫。近年来,在我省榆林沙区每隔3～5年暴发一次,少则几万亩,多则数十万亩,直接威胁着林木的正常生长。关于该虫的防治工作,以前多用化学药剂常规喷雾或飞防,费工费时,成本较高,特别是在水源缺乏的沙区应用更加困难。1986年,我们采用人工超低量喷雾进行了较大面积的防治。实践证明,这 Apochima cinerarius Erschoff, also known as the sand jujube moth, Liu moth, moth and so on, is a food miscellaneous, widely distributed, serious damage to leaf-eating pests. In recent years, outbreaks occur every three to five years in the Yulin Sandy Area in our province, ranging from tens of thousands of mu, more than hundreds of thousands of mu, which directly threaten the normal growth of trees. On the prevention and treatment of the insects, the conventional multipurpose chemical spraying or flying anti-chemical, costly and time-consuming, high cost, especially in sandy areas of water shortage is more difficult to apply. In 1986, we used artificial ultra-low volume spray for a large area of ​​control. Practice shows that this