Flammulina base rot control method

Flammulina base rot, also known as root rot, occurs mostly in raw material-grown enoki mushroom, but it has also been common in clinker cultivation and bottle planting in recent years, and the damage is more serious.

Symptoms: At the early stage of disease, watery spots appear on the base of the stipe. As the disease progresses, it gradually enlarges, and the color gradually deepens, turning into dark brown rotting. During the development stage of the fruit body, the base of the stipe became dark brown and black rotted, and after the base was rotted, the fruit body lay down. Mushroom disease, will not lodging, gradually shrinking to stop growing.

Pathogens: The pathogen is Penicillium botulinum subsp. stipendum. When growing on potato sucrose agar, the mycelium is grayish white, slender, and has a fast growth rate. After the conidia were formed, the colonies became grayish white powder, and the medium below the colonies turned dark red or purple, and the whole colonies became pink. Under the microscope, the conidiophore stem grows on the mycelium and grows like a finger, forming a long-chain conidia chain at the apical end and falling off from the top of the chain after the conidia mature.

Disease characteristics: The bacteria live in the soil and organic matter, and its parasiticity is weak. It is mainly saprophytic and can be transmitted through the air for initial infection. It is in a medium-temperature, high-humidity or low-temperature and high-humidity environment, especially on the culture surface. Under conditions of long-term accumulation of water, pathogens invade and invade from the stipe, and their disease spreads faster. Many pathogenic bacteria inoculated in Pleurotus ostreatus fruiting body did not infect. The disease occurs more frequently in indoor cultivation and occurs in the mushroom bed of cottonseed husks.

Control methods

(1) When preparing culture materials, strictly control the water content. During the fruit body growth stage, avoid long-term accumulation of water on the mushroom bed.

(2) Do a good job in environmental sanitation of the mushroom house, timely ventilation and ventilation, and control the relative humidity of the air to not exceed 95%.

(3) Chemical control The diseased mushrooms were found and promptly removed. After spraying, 1:500 times of 25% carbendazim or 1:800 times of 70% thiophanate-methyl, or 1:500-fold of 65% zeocin was sprayed. Common agents: carbendazim, thiophanate-methyl, and dexamethasone.

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