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光肩星天牛自1977年传入我县以来,危害面积逐年扩大,据1985年统计遭受为害的林木达304万株,占全县农田林木株数的26％,平均每株树虫口密度为5.2头,因遭为害不能成活而被迫砍伐的林木达36.3万株。为了控制其为害,我们除应用常规防治方法外,又于1984年从山西省太原市林场引进熏蒸毒签防治天牛幼虫的方法。经过试验、示范,收到良好的效果。1985年我县共推广熏蒸毒签33.2万支,共防治8条林带、12个村庄,防治树木约3万株。防治效果平均92.5％,现总结如下。
Since its introduction into our county in 1977, the Hazardous Area has been expanded year by year. According to statistics in 1985, 3.40 million trees were harmed, accounting for 26% of the total number of trees in the entire farmland. The average density of pests in each tree was 5.2, There were 363,000 trees forced to cut down because they could not survive. In order to control its damage, we applied the conventional method of prevention and control and introduced the method of controlling the larvae of Tianzhu from the forest farms in Taiyuan, Shanxi Province in 1984. After testing, demonstration, received good results. In 1985, our county promoted a total of 332,000 fodder smugglers and a total of 8 forest belts, 12 villages and about 30,000 trees for prevention and control. The average control effect of 92.5%, are summarized as follows.