Symptoms The infected fruiting bodies of Mushrooms are irregular white cotton flocculent groups, with a sterile cap and a stipe. The surface is covered with white flocculent hyphae and exuded with dark brown droplets, giving off a rancid odor; it can also cause bacteria. The stalk enlarges or the mushroom umbrella shrinks, resulting in brownish droplets after ulceration.
Transmission routes and disease conditions The bacteria usually live in soils rich in organic matter, and are often transported by soil or nutrients to mushroom houses, causing early onset of mushroom beds. It can also spread through tools and picking staff to expand damage. In particular, water spray helps the spores spread out from the mushrooms. High temperature, high humidity and poor ventilation are conducive to disease. When the temperature is higher than 1°C, the mycelium or fruit body becomes more serious.
Control methods: (1) If the casing soil on the mushroom bed has been contaminated with Fusarium mold, pasteurization can be used, that is, disinfection with 1.6% formaldehyde, or spraying 25% carbendazim WP 500 times in the casing soil, Or 60% anti-mildew treasure ultra-fine powder 600 times, 50% thiophanate-methyl WP 500 times, 45% tex multi-suspension 3000 times. (2) In the initial stage of disease, water spray is stopped and the house is ventilated and dehumidified. The temperature is controlled below 15°C, and the ward sprays 1% to 2% formaldehyde solution or 50% carbendazim wettable powder 500 times. (3) If the disease is serious, remove the original covered soil, replace it with new soil, bury or burn the mushrooms, and disinfect all appliances in 1.6% formaldehyde solution.
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