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对松毛虫,长期来在“化学农药”万能的主导思想指引下,严重破坏了森林生态系统。化学农药的本身,就是森林生态系系中的外加成份,其作用是暂时的,它杀死害虫,也能弄死益虫,从而使害虫失去自然控制发生而为害,结果是年年治虫。年年有虫。据初步统计,仅南方十五省、市,每年因马尾松毛虫为害,使木材生长量约减少360万立方米以上。七十年代以来,虽提出了“综合治理”
For the pine caterpillars, under the guidance of the dominant principle of “chemical pesticide” for a long time, it has seriously damaged the forest ecosystem. Chemical pesticides themselves, which are added components of forest ecosystems, have a temporary effect. They kill pests and can kill beneficial insects, causing the pests to lose their natural control and causing damage. The result is annual pest control. Annually with worms. According to preliminary statistics, only 15 provinces and municipalities in the south of the country suffer from Dendrolimus punctatus each year, reducing the timber growth by about 3.6 million cubic meters. Since the seventies, although the proposed “comprehensive management”