Edible fungus cover spot disease typically appears in the early stages of infection, where the surface of the mushroom cap becomes uneven, followed by round or irregular lesions. When humidity is high, the infected mushrooms on the bed may develop white fruit bodies, and in severe cases, the gills can stick together. It's important to apply pesticides promptly for effective prevention and treatment.
The disease spreads mainly through soil carried into the growing area and is transmitted via air currents. High relative humidity, especially above 95%, creates ideal conditions for the disease to thrive. Therefore, maintaining proper environmental control is crucial in managing this issue.
Control measures include: (1) Increasing ventilation in the mushroom house after the disease occurs to reduce humidity and prevent further spread. (2) Promptly removing and disposing of infected mushrooms to avoid contamination of healthy ones. (3) In the early stages of infection, spraying with a 500-fold dilution of 50% carbendazim wettable powder, a 600-fold dilution of 70% thiophanate-methyl wettable powder, or a 600-fold dilution of 60% anti-mildew solution can be effective in controlling the disease.
In addition to chemical treatments, maintaining good hygiene in the growing environment, regularly cleaning tools, and ensuring proper airflow are essential steps in long-term disease management. Monitoring humidity levels and adjusting them as needed can significantly reduce the risk of outbreaks. Early detection and quick action are key to minimizing losses and ensuring a healthy crop.
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