Pleurotus ostreatus has a layer of white hairs on it, which may be due to the incorrect storage space. For example, if it is often stored in a plastic bag, it will produce white spores and white steamed buns, which are non-toxic. After it is stored for a long time, it will be accompanied by the symptoms of mushroom aging, which may affect the taste and nutrition. People with high taste and nutrition requirements should avoid eating it.

if the local taste is not deteriorated, it will not affect the normal eating. However, if the taste is deteriorated or the color is black, you should avoid eating it, which may lead to fungal and fungal infections, accompanied by nausea, vomiting and abdominal pain.

It may be that spores on the back of the mushroom cap are scattered on the lower mushroom cap, or it may be something produced by itself on the surface of the mushroom cap. It is not clear what it is. But these two things have no hair, and they can be wiped off with a light brush, and spore powder can be felt on your hands. The white one is mycelium. After being put in the refrigerator, there are more white hairs, which should be caused by low temperature and humidity and hyphae.