巴里坤县大蒜白腐病发生严重,发病株率达10%～20%,影响大蒜的高产稳产。一、发病症状主要危害叶片、叶鞘和鳞茎。初染病时外叶叶尖呈条状或叶尖向下变黄,后扩展到叶鞘及内叶,植株生长衰弱,整株变黄矮化或枯死,拔出病株可见鳞茎表皮产生水渍状病斑,长有大量白色菌丝层,病部呈白色腐烂,菌丝层中生出大小为0.5～1.0毫米的黑色 Barkun County garlic white rot serious, the incidence rate of 10% to 20%, affecting the high yield of garlic. First, the main symptoms of disease leaves, leaf sheaths and bulbs. At the time of the initial infection, the tip of the outer leaves is in the shape of a strip or the tip of the leaves turns yellow downward, and then expands to the leaf sheath and the inner leaves. The growth of the plant is weak, the whole plant turns dwarf or dead, and the diseased plant can be observed to produce water- Lesions, a large number of long white mycelium, the disease was white rot, mycelial layer gave birth to the size of 0.5 to 1.0 mm black