MySheen

Brown spot of edible fungus

Published: 2024-11-22 Author: mysheen
Last Updated: 2024/11/22, Damage to crops: edible fungus damage symptoms: do not infect the mycelium, only infect the fruiting body, but can grow along the mycelium to form a gray tissue mass with dry texture. The infected buds stopped differentiation; after infection, the cap became smaller, the stalk thickened and browned, forming malformed mushrooms; after the fruiting body was infected in the middle and later stage, many needle-shaped and irregular brown spots were produced on the cap, and gradually expanded into gray-white depressions. Diseased mushrooms often peel off or peel off the surface, do not rot, no odor. The course of disease was about 14 days. Classification attribute: Wheel branch

Harmful crops: edible fungi

Damage symptoms: do not infect the mycelium, only infect the fruiting body, but can grow along the mycelium to form a dry gray tissue mass. The infected buds stopped differentiation; after infection, the cap became smaller, the stalk thickened and browned, forming malformed mushrooms; after the fruiting body was infected in the middle and later stage, many needle-shaped and irregular brown spots were produced on the cap, and gradually expanded into gray-white depressions. Diseased mushrooms often peel off or peel off the surface, do not rot, no odor. The course of disease was about 14 days.

Classification attribute: fungal diseases caused by Cladosporium verticillium

Characteristics of the disease: soil-covered bacteria were the initial source of infection, and the transmission in mushroom houses was mainly water spraying, water splashing, insects, tools, operation, airflow and so on.

Prevention and control methods: do a good job in the hygiene of the mushroom room to prevent mushroom flies and mosquitoes from entering the mushroom room. Mushroom houses are strictly disinfected before and after use, mushroom-picking utensils are disinfected with 4% formaldehyde solution before use, disinfection or pasteurization before covering soil, and the use of raw soil is strictly prohibited. Do not get too wet when covering the soil. In the early stage of the disease, the water was stopped immediately and the temperature was reduced to less than 15 ℃ to strengthen ventilation and dehumidification. Remove the diseased mushrooms in time and spray 2% formaldehyde or 0.2% carbendazim in the overlying soil layer of the disease area. Spraying 0.2% carbendazim solution on the diseased mushroom bed can inhibit the spread of bacteria.

Commonly used medicament: carbendazim

 
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