Prevention and Control of Flammulina velutipes Witches' Broom Disease

When we grow Flammulina velutipes, we may often encounter various diseases. So today I will tell you about the prevention and treatment methods of Flammulina velutipes witch's broom disease:

The causes of the disease:

This is due to poor ventilation in the mushroom farm, high carbon dioxide concentration, and high humidity, which inhibit the growth of the cap. This disease is more common in air-raid shelters, tunnels, and other planting places where the air is not circulating. For bag-grown or bottle-grown Flammulina velutipes, when the mycelium grows to a certain stage and turns to fruiting body formation, that is, after the primordium appears, proper ventilation and light stimulation should be maintained, and the humidity of the mushroom house should be reduced. At this stage, if the carbon dioxide concentration inside and outside the bottle and bag mouths accumulates too high, there is insufficient oxygen and lack of weak light stimulation, and the humidity is too high, the fruiting body will grow abnormally, only the stipe will grow without forming a cap, and branches will continue to appear at the top.

Prevention and Control of Flammulina velutipes Witches' Broom Disease

Prevention and treatment methods:

The mushroom production site must have good ventilation conditions. After the fruiting body primordium is formed, the bottle-grown Flammulina velutipes must first be cultured for 3 to 5 days to form young mushrooms, and then bagged for mushroom growth. After bagging, the bag must be lifted up and down for ventilation 1 to 2 times a day. For bag-grown Flammulina velutipes, ventilation must be immediately strengthened to reduce carbon dioxide concentration in the early stage of fruiting body growth.

The cover can be opened to keep enough fresh air in the bag to promote the differentiation of the cap and the thickening of the stipe. After the cap develops normally, it can be managed according to the cultivation and management methods of commercial mushrooms. Once the mushroom buds are found to grow abnormally and the top of the stipe is forked and drooping, they should be removed in time to recreate the environmental conditions that are conducive to the formation of fruiting bodies so that they can still grow normally.