Symptoms and Control Measures of Green Mold Disease in Wood Ear Mushrooms

Wood ear mushroom is one of the fungi we commonly eat in daily life. Because wood ear is a mycelial fungus, the chances of pest damage and contamination by foreign microorganisms during cultivation are very high. Once it becomes diseased, it can cause great losses to our growers, and some even lose everything, which no one wants to see. Green mold disease of wood ear mushroom is a common disease. What are its main symptoms? What control measures are there?

I. What symptoms appear when wood ear mushroom contracts green mold disease?

Green mold disease of wood ear mushroom is a disease that very easily occurs during wood ear cultivation. There are many types of it, mainly Trichoderma viride, Trichoderma koningii, and Trichoderma atroviride as the main harmful pathogens. Green mold disease can be contracted at any stage of wood ear growth. If infected with this pathogen, white mycelium will appear on the fruiting bodies of the wood ear in the early stage, and it is relatively slender. After the spores multiply in large numbers, a powdery green mold will appear.

Generally speaking, whether it is the culture medium, the fruiting bodies, or wood chips, all can cause colonies to form. In particular, the base of the wood ear after harvesting is also relatively easy to infect, because the green mold pathogen is prone to occur under conditions of relatively high temperature, relatively high humidity, and acidic culture material.

Green mold mainly causes harm in three aspects. First, after decomposing the cellulose and lignin in the culture medium, it competes with the mycelium for nutrients; second, it secretes certain toxins that affect the growth of wood ear mycelium; third, it produces spores that contaminate the environment for cultivating wood ear, increasing the difficulty of mycelium cultivation.

II. How to identify green mold disease in wood ear mushroom?

Green mold disease in wood ear is very easy to identify. First, if infected with this pathogen, the mushroom bags will turn green, and the green spores of the green mold pathogen can also be seen in the culture medium, and their distribution is not in patches. Its mycelium is somewhat more slender than wood ear mycelium. Then, green mold smells like a mixture of moldy clothes and rotten wood. Especially when this bacterium multiplies in large numbers, experienced growers can generally rely on smelling this odor to judge whether green mold disease is present. Finally, it can also be felt by touching, because as time goes on, the culture medium in the mushroom bag will gradually soften. If the wood ear mushroom bag does not feel soft when touched, then green mold may have appeared.

III. What control measures are there for green mold disease in wood ear mushroom?

1. Pay attention to cleaning the wood ear cultivation environment, do a certain amount of sweeping work, and reduce the presence of foreign microorganisms.

2. Pay attention to the ventilation of the wood ear cultivation room, so that it will not be too humid and increase the chance of bacterial growth.

3. After the wood ear mushrooms emerge, spray limewater of a certain concentration every day, which can have a very good mold-prevention effect.

In summary, if you want wood ear mushrooms not to contract green mold disease, you need to destroy the favorable environment for mold occurrence, so every step of cleaning and disinfection must be strictly done well.