1. Too high temperature: after forming primordium, if the continuous temperature is above 30 degrees, Oyster mushroom caps will gradually wither and die.
2. Too high or too low humidity: after forming tiny buds, if the relative air humidity of mushroom house or greenhouse is under 80%, tiny mushroom bodies will wither and die for lack of water. During the expanding period of sporocarp on Oyster mushroom, excessive water spraying will also result in edema, yellow and rotten sporocarps and lead to death.