1. Unhealthy environment: Sundries should be stored away from mushroom house and cultivation field, strict sterilization should be guaranteed while contaminated materials should be forbidden in mushroom house.
2. Too high temperature in late cultivation period: During the growth period of sporocarps, the superior temperature range is 5-20 degrees, after spawns get matured, you could accelerate the formation rate of sporocarps by increasing the temperature difference between day and night. Too high temperature in late cultivation period inhibits the formation of mushroom buds or brings difficulties for the formation.
3. Excessive relative air humidity: During the spawn running period, you should keep relative air humidity in 70% or so, and make it in 90% or so during the fruiting period. When it exceeds 95%, pests and diseases are incident while fungus caps are easy to turn color and rot.
4. Improper water usage: After mushrooms fruit, excessive water-spraying blackens and festers mushroom bodies. Too low humidity in base stock causes wizened, cracked or withered mushroom caps, thus you could spray water in moderate and light way so that the moisture deficiency in base stock could be met.
5. Direct sunlight: Sunlight is not required during the growth phase of spawns while it is needed during the growth phase of sporocarps. Direct sunlight drys and yellows the surface of mushroom bodies.
6. Poor ventilation: During the fruiting period, once oxygen deficit occurs, sporocarps are hard to form or misshapen mushrooms are visible. Dry and warm wind results in large amount of dead mushrooms while dry and cold wind does terrible damages to mushroom bodies, hence you should ventilate the house lightly and quietly.
7. Late picking: Too early picking results in output failure while too late one causes losses in weight. In general, you could pick mushrooms when caps are fully-developed and spores are not ejected yet.