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杉木是本省的主要用材林树种,舟山地区近年来,在领导的重视下,大力开展杉木基地建设,营造了大片杉木幼林。1973年,舟山林场、定海县东湾、光明、金林等大队发现三公尺以下的杉木,主侧稍受杉梢小卷蛾为害达60～70%,严重林地受害率达90%。幼虫先吃嫩叶,后蛀嫩梢,初害现萎黄,逐渐变红枯死,特别是顶梢受害,出现双头或多头现象,不但严重影响当年幼树的高生长,而且主干弯曲,影响杉木材质。我们遵照毛主席关于“同病虫害作斗争”的教导,对杉梢小卷蛾进行观察和防治,初步摸到了一些规律,现简介如下:
Cunninghamia lanceolata is the main timber forest species in the province. In recent years, under the leadership of leaders, the Zhoushan area has vigorously carried out the construction of the Cunninghamia lanceolata base and created large areas of young cedar forests. In 1973, the brigade of Zhoushan Forest Farm, Dongwan of Dinghai County, Guangming, Jinlin and other brigade found that Chinese fir below three meters, the main side slightly affected by Shadingeria larvae up to 60 to 70%, serious damage rate of 90%. Larvae first eat young leaves, after the young moth shoots, the initial damage is chlorotic, gradually red and dead, especially the top shoot victims, appear double or long phenomenon, not only seriously affected the growth of young trees that year, and trunk bending, affecting Chinese fir Material. In accordance with Chairman Mao’s teachings on “fighting against pests and diseases”, we have observed some of the small-headed moths,