我县榆树防护林较多,分布面广。多年来,由于受榆紫金花虫的危害,轻者枝叶残缺不全,重者枝叶不生,用药械除治,在榆紫金花虫上树后,因树高喷不上药。越冬成虫出土不齐,虫态重叠,治了成虫,遗留虫卵,造成年年治虫,年年有虫,确实是个老大难问题。毛主席教导我们:“人民,只有人民,才是创造世界历史的动力。”广大人民群众在实践斗争中,本着“治早、治小、治了”的原则,创造出“撒药圈,涂药环”的 I County elm shelter more widely distributed. Over the years, due to the harm caused by Elm purple flower insects, the light branches and incomplete incomplete, heavy branches and leaves are not born, with medical devices in addition to governance, in the elm purple flower insects on the tree, due to the tree spray is not on the drug. Overwintering adult unearthed, insect state overlap, the treatment of adult worms, eggs left, resulting in annual pest control, insect every year, is indeed a chronic problem. Chairman Mao taught us: “The people and the people alone are the motive force for creating the history of the world.” In the course of their practical struggle, the broad masses of the people, in line with the principle of “treating early, treating small and governing,” have created “ Tu drug ring ”