我县桃林林场,1959年大跃进以来,先后在丘陵红壤地区营造了3000多亩杉林.1965年以后,发现杉天牛为害,树干流白浆,有的风吹断尖,少数整株枯死.起初没有引起重视.到1970年,出现成片枯死,特别是大风暴雨时被害的杉树相继风折,灾情日趋严重.1970年开展了对杉天牛危害的调查,及其生活习性的观察和防治试验.1974年县林科所成立后,对全县的杉木林基地作了两次虫情普查,发 Since the great leap in 1959, it has built more than 3000 mu of cedar forests in hilly red soil areas. After 1965, it was discovered that Cinnabar boreal trees were damaged, the trunk flowed white with some winds, and the whole plant was dead At first, no attention was paid to the fact that by 1970 the cedar trees that died in dying, especially during heavy storms had been devastated and the situation became more and more serious. And control trials .1974 County Forestry Branch was established, the county’s fir forest base made two census census, hair