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榆树是东北、内蒙古地区西部主要造林树种,近三十年来,由于榆紫叶甲的猖獗危害,目前榆树已残留无几。自一九七一年以来吉林省林科所着手对此种害虫防治技术进行了探索,一九八○年受林业部的委托又同怀德县杨大城子林场协作,对榆紫叶甲防治技术获得可喜成果。在对榆紫叶甲生物学特性较为系统研究的基础上,利用(1)JLY—8401毒胶环防治榆紫叶甲简便易行,省工省时,成本低,很少杀伤天敌,效果显著;(2)一九七一年最
Elm is the northeast, Inner Mongolia, the main afforestation species in the western region, the past 30 years, due to the rampant harm of Elm leaf A, the current elm residues have been less. Since 1971, Linke in Jilin Province has started to explore such pest control technologies. In 1980, commissioned by the Ministry of Forestry and in collaboration with Yang Dachengzi Forest Farm in Huaide County, Technology achieves gratifying results. On the basis of a more systematic study of the biological characteristics of Ulva pertussis, it is simple and convenient to use (1) JLY-8401 poison gel ring to control Ulva pertussis, which saves labor, saves time and low cost and seldom kills natural enemies ; (2) the most in 1971