Mushrooms in the Ru Ru phase can often experience issues such as bud withering, yellowing, and eventual death due to poor management or unfavorable environmental conditions. In severe cases, small mushrooms may die in large numbers. The main causes of mushroom death include:
1. **Nutrient Deficiency**: If the culture medium lacks sufficient nutrients, and the fruiting bodies become too dense on the soil surface, it can lead to competition for resources. Additionally, careless handling during mushroom harvesting can damage surrounding mushrooms, disrupting their normal growth and development, ultimately leading to their death.
2. **Sudden Temperature Rise**: A rapid increase in temperature, especially when the mushroom house is exposed to temperatures between 21-25°C for several days, accelerates water evaporation and metabolic activity. If the supply of water and nutrients is insufficient, mushrooms may wither and die due to dehydration and lack of nourishment.
3. **Poor Ventilation**: Long-term inadequate ventilation leads to a buildup of carbon dioxide, causing oxygen deficiency. This is particularly harmful to young mushrooms, and the problem becomes more severe at higher temperatures.
4. **Moisture Imbalance**: Mushrooms are highly sensitive to moisture levels. If the cover soil isn't watered in time, or if excessive or low-quality water is sprayed, it can cause waterlogging or dryness. This disrupts the mycelium's health, leading to nutrient deficiencies and mushroom wilting or death.
5. **pH Imbalance**: The ideal pH range for mushroom mycelium growth is 6–8. If the pH of the cover soil or irrigation water drops below 5 during the fruiting stage, it can result in mushroom death due to an overly acidic environment.
6. **Pesticide Toxicity**: Overuse of pesticides can lead to phytotoxicity. If mushrooms turn red or brown after pesticide application and no pathogenic bacteria are found, it’s likely due to chemical damage rather than disease.
**Prevention Measures**:
1. During the water transfer stage of the overburden layer, ensure that the mushroom parts are pressed down to prevent mycelia from emerging above the soil surface. This helps avoid overcrowding and promotes healthier growth.
2. In the late stages of spring mushroom cultivation, maintain proper cooling in the mushroom house to protect against high-temperature stress.
3. Improve ventilation to reduce humidity, prevent carbon dioxide buildup, and minimize the risk of microbial growth.
4. Implement a flexible watering schedule based on weather conditions, mushroom maturity, and specific needs. Follow the principle of "spray more when sunny, less when rainy; spray more on mushrooms, less on non-mushrooms." Ensure stable water quality, avoid overwatering, and maintain consistent moisture levels without flooding.
5. When using pesticides, strictly control the concentration to avoid over-application, which can cause phytotoxic effects. Always follow safety guidelines to protect both the mushrooms and the environment.
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