榆尺蠖是榆树的主要害虫,曾在银川、永宁、中宁等地大发生过。1970年又在盐池大发生,林场的万余亩榆树林的叶子基本被吃光,对林木的当年生长和下年发芽造成严重危害,甚至死亡。因此,积极开展榆尺蠖的防治工作,是刻不容缓的任务。现将今年我们防治榆尺蠖的几点体会介绍如下,供参考。一、掌握榆尺蠖发生规律,取得治虫主动权:榆尺蠖一年发生一代, Elm cucumber is the main pest of the elm trees, once in Yinchuan, Yongning, Zhongning and other places have occurred. In 1970, it happened again in Yanchi. The leaves of more than ten thousand mu of elm trees in forest farms were basically eaten, which caused serious harm to the growth of trees and the germination of next year, and even died. Therefore, actively carry out the prevention and treatment of Yu-ru-chi, is an urgent task. Now this year we control the experience of Yuzhang 几 introduced below, for reference. First, grasp the rules Yufugu,, access to the initiative to control pests: Yu foot 蠖 a generation a year,