1. Look at the shape: the nontoxic mushroom cover is flat, the umbrella surface is smooth, the mushroom surface has no wheels, and the lower part is sterile. The center of the poison cap is raised, the shape is strange, the surface of the cap is thick and hard, and there are bacteria wheels on the stem. The stem of Volvariella is slender or thick and easy to break.

2. Look at the secretion: tear open the fresh wild mushrooms, the nontoxic secretion is as clear as water, and the mushroom surface will not change color after tearing. The secretion of poisonous mushrooms is thick and reddish brown, and it is easy to change color in the air after being torn.

3. Cooking test: When cooking wild mushrooms, put a few rushes or a little garlic or rice to cook together. When rushes turn turquoise or purple-green, they are toxic, while those that turn yellow are non-toxic. Garlic or rice is toxic when it changes color, but it is non-toxic when it remains unchanged.

4, look at the growth zone: edible non-toxic mushrooms grow mostly on clean grasslands or pine trees and oak trees, and poisonous mushrooms often grow in dark, humid and dirty areas.

5, look at the color: there are brightly colored poisonous mushrooms, such as red, green, dark black, blue, purple, especially purple is often very toxic, easy to change color after picking.

6, onion test: when picking wild mushrooms, you can rub onions on the mushroom cover. If the onion turns blue-brown, it proves that it is poisonous, otherwise it is nontoxic.

7. Smell: Non-toxic mushrooms have a special fragrance. There are poisonous mushrooms with strange taste, spicy, sour and fishy.