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敖汉旗是赤峰市南部发生松毛虫比较严重的地区,到1986年松毛虫已经蔓延30万亩,严重地块平均虫口300～500条/株。给松林造成了很大损失。为了对松毛虫进行大面积防治,我们在1986年9月选用吉林通化生产的25％灭幼脲Ⅲ号进行了防治试验。试验表明,亩用量30克杀虫效果较好。在试验的基础上,1987年5月我们对4～6龄松毛虫进行大面积防治,共计防治面积11.15万亩。
Aohan Banner is the occurrence of pine caterpillars in the south of Chifeng City. By 1986, the number of dendrolimus has been increased by 300,000 mu. The average number of moths in the block is 300 ~ 500 / plant. To pine caused great loss. In order to carry out large-scale control of pine caterpillars, we conducted a control test in September 1986 using 25% diflubenzuron produced by Jilin Tonghua. Experiments show that the amount of 30 grams of mu insecticidal effect is better. On the basis of the experiment, in May 1987, we conducted large area control of 4- to 6-year-old pine caterpillars with a total area of 111,500 mu.