继在江永县低山丘陵石灰岩地区发现黄枝油杉(Keteleeria calcorea Cheng et L.K.Fu)后,今年5月下旬,我们在江永县考察中发现黄枝油杉枯梢病,经调查,江永县松柏公社和县林科所两处,此病的发病率达85％。主要为中幼龄树感病,中龄树以侧枝感病多,幼龄树主梢侧梢均有发生,轻则针叶枯黄,重则几乎每个春发主梢和侧梢均被病菌侵染,引起大 Following the discovery of Keteleeria calcorea Cheng et LKFu in the hilly limestone area of ​​Jiangyong County, in late May this year, we found Shoot Blight of Fagaceae in Jiangyong County. After investigation, Yongxian cypress commune and County Forestry Branch two, the incidence of the disease reached 85%. Mainly for young and middle-aged tree disease, middle-aged tree to more susceptible to lateral branches, young tree shoots have occurred lateral shoots, ranging from the yellowish leaves, weight, then almost every spring main shoots and lateral shoots are bacteria Infected, causing big