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我国是马尾松毛虫(Dendrolimuspunctatus Walker)为害最严重的一个国家,远在二百五十年以前,就有成灾记载,初步统计,全国每年因松毛虫为害,使木材生长量约减少了360万立方米以上。七十年代以前,在“农药万能”主导思想指引下,严重破坏了森林生态系统,虽年年防治,为害却越来越严重。后来提出了“综合治理”的方针,但是大部分地区仍然是化学农药占优势,生物防治比重很小。笔者认为,必须
China is the country most devastated by Dendrolimus punctatus Walker. As far as 200 years ago, there were reports of disasters. According to preliminary statistics, the annual growth of timber in the country was reduced by about 3.6 million Cubic meter or more. Before the seventies, under the guidance of the dominant principle of “pesticide universalism”, the forest ecosystems were severely damaged. Although they are prevented and controlled every year, the damage is even more serious. Later, the principle of “integrated management” was put forward, but chemical pesticides still predominated in most areas and the proportion of biological control was still small. I think, must