How to effectively control the growth of contaminating fungi in black fungus (wood ear mushroom) cultivation?

Black fungus (wood ear mushroom) is an edible fungus with relatively high economic value, deeply loved by consumers; whether stir-fried or served cold, it is especially crisp and refreshing, and it is also rich in certain nutrients. During the cultivation of black fungus, if management is improper, contaminating fungi are very likely to appear, which will lead to reduced yield and quality. So how do you control the growth of contaminating fungi in black fungus?

Generally speaking, the methods for preventing and controlling the growth of different contaminating fungi differ somewhat. Below, let us take a look together at several common methods for preventing and controlling contaminating fungi in black fungus.

1. Black fungus green mold disease

Black fungus green mold disease can occur at any stage of wood ear mushroom production, and once it occurs, the wood ear mushroom yield will definitely be reduced. This pathogen has many opportunities to enter the fungus bags, such as through the sawdust, corn cobs, and wheat bran used, and especially weak-growing fruiting bodies are very easily infected.

Prevention and control methods: Usually keep the area around the mushroom shed clean and hygienic. The wood ear mushroom cultivation site must be well ventilated and drained, so as to reduce the growth factors that breed contaminating fungi. After the wood ear mushrooms emerge, spray lime water once every three days for disinfection. Use fresh culture material as much as possible, and especially strictly control the sterilization step. When handling the fungus bags, be sure not to break them, otherwise the contaminating fungi will immediately get in.

2. Black fungus rot disease

Black fungus rot disease is also called flowing ear, and its main manifestation is that after the wood ear mushrooms mature, the wood ear slices become soft; in severe cases, it can cause the base of the wood ear mushrooms to ulcerate. The main cause of this disease is untimely harvesting combined with factors such as high temperature, poor light, poor ventilation, and very high humidity, causing large areas of wood ear mushrooms to rot. Of course, it may also be caused by the bag material, for example, if the bag material is too wet or the pH fluctuates high and low, it can cause wood ear mushroom rot.

Prevention and control methods: Usually strengthen the ventilation conditions and lighting conditions of the wood ear mushroom cultivation environment. After the wood ear mushrooms mature, harvest them immediately to avoid the phenomenon of rot. Once rot occurs, use a wooden knife to scrape off the rotten area, then rinse it clean with quicklime at a certain concentration. If rot occurs over a large area, use professional medicinal treatment, such as mushroom disease spirit medicinal liquid.

3. Wood ear mushroom cowhide band

This is a common disease of wood ear mushrooms, and its main manifestation is that something like a dog-skin plaster is tightly stuck on the wood ear mushrooms. Cowhide band is a kind of contaminating fungus that affects wood ear mushroom yield, and once it occurs, the consequences are relatively serious. This kind of contaminating fungus is mostly seen in rainy and humid weather, and if the disease is severe, it will cause the entire wood ear mushroom to have this pathogen attached.

Prevention and control methods: Strong light must not shine directly on the wood ear mushrooms. For the mushroom piles, attention should be paid to strengthening daily management work, especially ventilation, watering, and weeding. After heavy rain, promptly drain the dirt in the clearing ditches to avoid the phenomenon of water accumulation and wood ear mushroom rot.