Black fungus black ear (also known as ear). The symptoms are: After the ear is mature, it becomes soft and even the ear dissolves. Bag cultivation of black fungus, culture material too wet, acid carbon degree is too high or too low, affect the normal growth of black fungus and cause bad ears. The following prevention and control methods can be adopted: 1. Strengthen the cultivation and management of the causes of the above-mentioned ear damage, and pay attention to ventilation, lighting, and light. 2, timely harvest, ears close to mature or mature immediately harvest. 3, can be 25ppm chlortetracycline or oxytetracycline solution spray to prevent the ear.
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