The young mushroom cap changes from gray or gray brown to local or all yellow, yellow or blue, so that the growth of fruiting bodies is inhibited, the long speed is obviously slowed down, and the shape of the mushroom grows abnormally as it continues to develop, or the cap shrinks. Alice, seriously affect the quality of goods. Causes of the disease: During the low temperature season when using the coal stove to increase temperature, the concentration of carbon monoxide and carbon dioxide in the shed is relatively high. After the fruit body inhales this type of gas, short-term poisoning symptoms are formed, but the cap (especially the edge) becomes difficult to change after turning blue. Poor quality plastic shed film is dripping on the fruit body after being precipitated by condensed water, and this kind of disease may also occur. Some residual components in the casing material, drug residues in the sprayer, intrusion of certain harmful gases from the outside, etc. , can also cause this problem to happen. Prevention and control measures: Since the disease is not caused by pathogens, it should be based on the specific circumstances of production, find out the cause of the disease, "prescribe the right medicine," but do not blindly use chemical drugs. JIANGMEN EASY TECHNOLOGY CO.,LTD , https://www.easylife-tech.com