一、为害症状发病的蘑菇在菇床上长得七零八落,有的呈褐色的干硬蘑菇,或发育不良的灰色小蘑菇,有的呈水浸状条纹,挤压菇柄都是水,也出现有菌丝逐渐腐烂,形成一个无菇的病区,有时在病区内产生一些褐色小菇,并提早开伞.蘑菇菌丝感染病毒后,就不能形成子实体.蘑菇菌蕾感染病毒后,子实体发育大多呈畸形. First, the symptoms of harmful mushrooms grow on the mushroom bed fall, and some were brown hard and dry mushrooms, or dysplastic gray mushrooms, and some were soaked stripe, squeeze mushroom stems are water, Also appeared hyphae gradually decay, forming a mushroom-free ward, and sometimes in the ward to produce some brown mushrooms, and early parachute.Mushroom mycelium infected with the virus, it can not form fruiting bodies mushroom fungus infection After the development of fruiting bodies were mostly deformed.