What is the problem of deformed mushrooms in oyster mushrooms? How to prevent it?
Deformed mushroom is a relatively common physiological disease in oyster mushroom production, mainly caused by poor management. A few are caused by strain degradation, pest and disease infestation. Prevention is based on the causes of deformed mushrooms.
1. Long-stalked mushroom. The mushroom stalk is very long, the cap is very small, and the differentiation is not normal. The reason of occurrence is the lack of oxygen in the mushroom room during the formation of the original base and differentiation period, or not taking off the bag in time, and the substrate is covered in the bag, which affects the normal differentiation of the cap.
Prevention and control methods: strengthen ventilation to make the concentration of carbon dioxide in the mushroom room below 0.1%; take off the bag in time to avoid covering the bag.
2. Spherical mushroom. The mushroom cap forms a spherical or verruciform shape, and the mushroom cap is not differentiated and irregularly shaped. It occurs because the temperature is too low for a long time when the mushroom body is developing.
Prevention and control method: Adjust the temperature of mushroom room above the minimum temperature limit for mushroom growth, generally above 5℃, in order to promote normal growth and development of mushroom.
3. Cauliflower-like mushroom. The mushroom is shaped like cauliflower and has multiple branches in the later stage. It occurs because the concentration of carbon dioxide is too high before or during mushroom emergence, or harmful gases such as sulfur dioxide are released by burning coal.
Prevention and control methods: strengthen ventilation and exhaust harmful gases in the mushroom room.
4. Shrinking mushroom. The mushroom body develops normally at the early stage, but during the expansion period, it becomes yellow and edematous, stops growing, and finally becomes soft and rotten. Edema-like is caused by excessive humidity or spraying water directly on the young mushroom body, and the mushroom body tissue absorbs water, affecting the respiratory metabolism and stops growing and dies. Prevention and control measures: control the relative humidity of the mushroom room at 80% to 90% and do not spray water on the young mushroom body. Sometimes the shriveled mushroom is caused by the degradation of the strain and the cap cannot grow up, i.e. recoil and shrivel. Prevention and control measures: Use good flat mushroom varieties.