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Detailed Explanation of Key Points of Disease Prevention Techniques in Mushroom Cultivation

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In late September, mushrooms begin to fruit one after another, which is also the time when pathogenic fungi in the mushroom house begin to multiply and cause damage. Mushroom walnut-flesh fungus (Diehliomyces microsporus) is one of the more serious pathogens in mushroom production. This fungus is also called "false truffle," and its pathogen is Microsporon. When the ascocarps are piled up, they appear walnut-flesh or cauliflower shaped, light yellow to cream colored, turning light brown when old and mature. The surface is covered with a scale-like substance, and the fungal flesh is dense and soft, with a fishy odor after being crushed, and large ones can reach over 10 cm. Once the mushroom house beds are infected by walnut-flesh fungus, water spraying on the bed surface should be stopped immediately to dry the substrate soil surface,

In late September, mushrooms begin to fruit one after another, which is also the time when pathogenic fungi in the mushroom house begin to multiply and cause damage. Mushroom walnut-flesh fungus (Diehliomyces microsporus) is one of the more serious pathogens in mushroom production. This fungus is also called "false truffle," and its pathogen is Microsporon. When the ascocarps are piled up, they appear walnut-flesh or cauliflower shaped, light yellow to cream colored, turning light brown when old and mature. The surface is covered with a scale-like substance, and the fungal flesh is dense and soft, with a fishy odor after being crushed, and large ones can reach over 10 cm.

Once the mushroom house beds are infected by walnut-flesh fungus, water spraying on the bed surface should be stopped immediately to dry the substrate soil surface, and the fruiting bodies of the walnut-flesh fungus should be picked out and replaced with corresponding new soil. Wait until the room temperature drops below 16°C, then manage according to routine practices, so as not to affect fruiting. In non-chemical artificial integrated management, pay close attention when the mushroom house temperature is high at 23-26°C; if ventilation is poor and the compost is overheated, acidic, and has poor air permeability, the aerial mycelium will weaken and a large outbreak will occur; short and dense white mycelium appears in the compost, on the compost surface, or in the soil layer, and a pungent bleaching powder odor occurs in the compost; while forming fruiting bodies, it also produces a large number of conidia.

Chemical control: If the infected area of this pathogen is small, diesel oil or kerosene can be poured on it, but it cannot be used over a large area, so as not to affect fruiting. For a more serious large-area outbreak, insist on using 800-times carbendazim solution for environmental disinfection, and mixing 800-times carbendazim into the compost can prevent occurrence. The diseased area can also be treated with 2% formaldehyde and fumigated with plastic film covering for sterilization; using 10 kg of 1% lime water plus 25 g of sodium carbonate, spraying 1-2 times in the diseased area, gives a relatively ideal effect.

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