蘑菇可变粉孢霉一般叫“棉絮状杂菌”,因为它发生后在土层表面的菌丝体,菌落散蔓像烂棉花一样。是蘑菇菇床常见竞争性杂菌,在菇床上覆土后的任何阶段均可发生。据蘑菇专业户介绍,近年在蘑菇生产中已普遍发生,而且发生时间还逐年提早。往年一般在11月中下旬,秋菇采收二、三批以 Mushroom variable powdery mildew is generally called “cotton-like bacteria”, because it occurs in the soil surface mycelium, colony scattered like rotten cotton. Mushroom bed is a common competitive bacteria, mushroom bed can be any stage after the soil can occur. According to Mushrooms professional introduction, in mushroom production in recent years has been widespread, and the time of occurrence also year by year earlier. In previous years, generally in late November, autumn mushroom harvest two or three batches