枝枯病真菌病害,主要为害枝干,造成枯枝和枯干,严重时可造成大量枝条枯死,对产量影响较大。病害先从幼嫩短枝开始发生,然后向下蔓延直至主干。受害枝条皮层初呈暗灰色,后变浅红褐色,最后变成深灰色,并形成很多黑色小粒点。病枝上的叶片逐渐变黄、脱落,枝条枯死。病菌以菌丝体和分生孢子盘在病部越冬,翌春条件适宜时产生分生孢子,借风 Diseases of the fungi disease, the main damage to the branches, resulting in dead branches and withered, in severe cases can cause a large number of branches dead, a greater impact on the yield. Diseases first begin with young shoots and then spread down to the trunk. Damaged branches of the cortex at the beginning of the dark gray, reddish brown after the change, and finally into a dark gray, and the formation of many black small particles. Lesions on the leaves gradually turn yellow, fall off, dead branches. Pathogens to mycelium and conidia in the disease in the winter, the next spring when the conditions produce conidia, borrow the wind