温室大棚蔬菜苗期猝倒病是蔬菜生产中的重要病害，经常造成幼苗成片倒伏死亡，给生产带来严重威胁和损失。１．发病特点猝倒病主要危害幼苗，有时也引起烂种。发病初期幼苗基部呈水浸状淡褐色病斑，逐渐缢缩成线状倒伏，潮湿时病苗附近表土会长出一层棉絮状白色菌丝。病菌... Vegetables in greenhouse greenhouse seedling damping-off disease is an important disease in vegetable production, often causing the seedlings into pieces lodging death, to produce a serious threat and loss. 1. The incidence of damping-off disease main damage to seedlings, sometimes causing bad seeds. In the early stage of seedling, the base of the seedling is watery hazel lesion, gradually shrinking into a linear lodging. When wet, the surface soil near the seedling will grow a layer of cottony white mycelium. Germs ...