枝干病害是林木最重要的一类病害。这类病害种类虽不及叶病多,但危害极大,幼苗、幼树或成年树枝条受病后一般导致枝枯,主干受病或某些系统性浸染的病害往往引起全株枯死。1.松树枝枯病松树枝枯病又名松干枯病、松烂皮病。危害赤松、黑松及油松等多种松树。在我国分布于东北、山东、河北、陕西、北京等地区。 Branch disease is the most important category of diseases. Although the types of diseases are not as many as leaf blight, they are extremely harmful. Generally, seedlings, saplings or adult twigs usually lead to branch blight when they are sick, diseases of main stem or some systemic dissemination often cause the whole plant to die. 1. Pine branch blight Pine branch blight also known as loose and dry, loose and rotten disease. Hazardous red pine, black pine and pine and other pine trees. Distributed in China in the northeast, Shandong, Hebei, Shaanxi, Beijing and other regions.