One, black spot. This is a bacterial disease caused by Pseudomonas. After the onset of disease, the mushroom mushroom caps appear oval brown or dark brown spots, the beginning of the needle-like shape, expanded to a diameter of 2-4 mm, the edge is neat, and sometimes the cap crack. Control methods: The most important thing is to control the appropriate temperature and humidity. When watering the mushroom house, water should not be directly sprinkled on the fruit body of E. velutipes, and in particular it cannot be sprayed with cold water. The humidity inside the mushroom house cannot be higher than 90% for a long time. It depends on the weather changes. The sunny watering should be light, diligent and fine, and the rainy days should be less sprinkled or not watered. Increase the ventilation after each watering and then cover the film. The indoor temperature during the fruiting period should be adjusted to below 17°C. Mushrooms should be removed in time after the onset of disease, and sprayed with 100-200 units per milliliter of agricultural streptomycin or bleach 600 times liquid.
Second, rust spot disease. The disease caused by Pseudomonas spp., mainly impregnated mushroom mushroom caps, the initial needle-like, after the expansion into sesame size, although the edge is not neat, but the lesions can be combined into an irregular large rust. Control methods: To prevent the occurrence of rust spot, do not spray directly on the fruiting body when spraying the mushroom house, and timely ventilation after spraying. The relative humidity of the indoor air should not exceed 95% for a long time. The moisture of the fruit body should be treated when the surface of the bacteria bag covers the plastic film. After drying. At the early stage of disease, germs should be prevented from spreading to healthy fruiting bodies and sprayed with 50% carbendazim 800-fold or 100-200 units of agricultural streptomycin per ml.
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