1. Pathogenic bacterias are Mycogone perniciosa Magn, Verticillium fungicola and heteromorphic Cladobotrun varium, which possess strong viability, have low temperature resistance and pleased to high humidity. They can grow in about 10 degrees and are common bacterias from late autumn to early spring.
2. Occurrence reason: improper management in low temperature season is the main reason, in low temperature season, humidity in greenhouse may be excessive, and water-spraying is excessive. Free water is adhered to mushroom bodies, after water absorption, it cannot evaporate, which results in the reduction of metabolism, all bacterias got chances to step in, make mass propagation, (and)cause various disease of sporocarps. The second reason is the continuous chilling weather causes too low temperature in greenhouse, sporocarps are in poor living environment for a long time. The third reason is that for some mushroom varieties, when fruiting period is in 3 or 4 flush, mushroom sacks are in malnutrition, after budding, sporocarps cannot get sufficient nutrient supplement, which results in the phenomenon of yellow and death.
3. Common prevention and control method:
A. People should frequently spray various insecticides once a week.
B. When the temperature of greenhouse is too low, people should avoid excessive water spraying and guarantee a suitable humidity that can meet the need of normal growth.
C. Try to increase the temperature of mushroom greenhouse, take Oyster mushroom as an example, it is best to keep temperature of greenhouse above 15 degrees at daytime.
D. People should fully understand temperature types, normal growing temperatures of various mushroom varieties and conduct correct management.
E. People should always spray various promoters in mushroom bodies.
F. When finding diseases , people could spray bactericides to control integratedly.
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