What causes the flow ear phenomenon in black fungus (wood ear mushroom)? How to prevent and control it
During cultivation, black fungus (wood ear mushroom) is highly prone to the flow ear phenomenon, which in mild cases leads to reduced yield and in severe cases to total crop failure, seriously affecting growers' economic returns. Therefore, preventing flow ear in black fungus can significantly increase economic returns. Let's take a look at the detailed introduction below with the editor.
1. Disease symptoms
When the flow ear phenomenon occurs in wood ear mushroom, the affected ear pieces initially turn pale yellow or coffee-colored, with a sticky surface, accompanied by a fishy odor, and in the later stage the entire wood ear mushroom rots. Flow ear is mostly caused by nematodes and bacteria, among which nematodes are the main cause of the flow ear phenomenon. Nematodes suck the sap from the cellular tissue of the wood ear mushroom, and the toxins in their excrement can directly harm the wood ear mushroom, causing it to become infected and rot.
2. Causes of the disease
Besides nematodes, management factors are also causes of flow ear in wood ear mushroom. When the wood ear mushroom matures, it continuously produces spores, consuming the fruiting body, which causes the fruiting body to age, and at this point it rots extremely easily once it encounters a high-humidity environment. Flow ear can also occur in environments with unsuitable temperatures. The wood ear mushroom is a high-temperature edible fungus and can grow normally between 22-34 degrees, but it has high humidity requirements, and this is also the period when nematodes reproduce rapidly. If environmental hygiene is poor, the reproduction rate of nematodes accelerates, making the flow ear phenomenon extremely likely to occur. During cultivation, poor ventilation in the ear shed leads to excessively high carbon dioxide concentration, which reduces the vitality of the ear fungus, causing the fruiting body to grow slowly or stop growing, while also providing a favorable environment for the reproduction of bacteria, nematodes and microorganisms, resulting in flow ear.
3. Prevention and control measures
During high temperatures, cooling measures should be taken well. The shed windows can be closed during the day and water mist sprayed to cool down, while ventilation should be strengthened at night, controlling the temperature within 30 degrees as much as possible. In such a temperature environment, the wood ear mushroom grows extremely fast, and the reproduction rate of nematodes is also inhibited. The ground of the ear shed should have a certain slope, and the surface soil should preferably be sandy loam to prevent water seepage, and the water source should preferably be clean deep well water. When the flow ear phenomenon occurs, first remove the flow ear, then spray low-concentration salt water, and at the same time spray lime water on the ground to control the spread rate of nematodes, then fumigate with aluminum phosphide for 24 hours.
The above is an introduction to the causes and prevention measures of flow ear in black fungus. We hope it can help you. To learn more related knowledge, please stay tuned to us.