You can eat them, they are mushrooms.

The white hairs on mushrooms are not germs or moldy, but white spores emitted by the mushrooms themselves after a long time.

It is non-toxic and is a sign of aging of the mushroom. But it's best not to put mushrooms to that extent, as it's not good for nutrition and taste.

Extended information

1, storage characteristics

Mushrooms are rich in amino acids, proteins, and delicious flavor. However, mushrooms have strong respiration after picking, they will open umbrella, browning, change flavor and deteriorate in quality very soon at room temperature, so they can only be stored for a short time. Dried mushrooms are easy to preserve, but the nutritional value decreases, and processing is not timely will cause serious losses.

Therefore, measures should be taken to prevent the quality of mushrooms from declining before storage, transportation, sale and processing. There are many cultivars of mushrooms, the common ones are flat mushroom, shiitake mushroom, Agaricus bisporus, enoki mushroom and cocktail mushroom.

2, storage conditions

The suitable conditions for mushroom storage are 0℃ and 95% relative humidity. The water loss of mushrooms is related to the black stalk and open umbrella, so the water loss can be reduced by packing with film or keeping the relative humidity higher than 95%.

Air-conditioned storage can inhibit the browning of mushrooms, controlled at 2--4% oxygen and 5--10% carbon dioxide is conducive to maintaining the white color of mushrooms and prolonging the storage life. The use of brine, citric acid, ascorbic acid, sulfur dioxide or steam heat treatment can passivate the polyphenol oxidase activity, preventing enzymatic browning; storage and transportation of mushrooms should be avoided with metal containers to prevent non-enzymatic browning.

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