杉木细菌性叶枯病主要为害针叶和嫩梢,引起叶及枝梢黄化枯死。十年生以下的幼树受害较重。在病害严重发生的地方,树冠如受火焚,严重的导致林分毁灭。据记载,我省过去很少发生此病。我们这次调查,在岳山林场1974年造林的林地,病害严重的发病率达53%;在蓝中公社白朗顶1971年造的丰产林,感病指数高达73%,严重影响林木生长。 Fungal bacterial leaf blight mainly affects needles and shoots, causing yellowing of leaves and shoots. Young trees under ten years old suffer more. In serious diseases where the crown as burned, a serious lead to destruction of the stand. According to records, the past few cases of this disease in our province. Our survey shows that in the Yinshan Forest Farm in 1974, the incidence of serious diseases was 53%. In the high-yielding forest made of the blue-white commune of Bai Langding in 1971, the susceptibility index was as high as 73%, seriously affecting the growth of trees.