If you want to know whether mushrooms are poisonous, I have a brilliant idea. Boil mushrooms in water and add ginger. If ginger turns black, it means that mushrooms are poisonous. If they don't change color, they are not poisonous. 1. Growth zone. Edible non-toxic mushrooms mostly grow on clean grasslands or pine trees and oak trees, while poisonous mushrooms often grow in dark, humid and dirty places. 2. color. There are poisonous mushrooms with bright colors such as red, green, black and blue, especially purple ones, which are often very toxic and easy to change color after picking. 3. shape. The cap of non-toxic mushrooms is flat, the umbrella surface is smooth, there is no wheel on the cap, the lower part is sterile, the center of the cap is raised, the shape is weird, the cap is thick and hard, the handle is ring-shaped, and the handle is slender or thick, which is easy to break. 4. secretions. Tear off the handle of fresh wild mushrooms, the nontoxic secretion is clear as water (some of them are white), and the surface of mushrooms will not change color after tearing off; The toxic secretion is thick and reddish brown, and it is easy to change color in the air after tearing. 5. Smell. Non-toxic mushrooms have a special taste, while toxic mushrooms have a strange taste, such as spicy, sour and fishy. 6. test. When picking wild mushrooms, you can wipe the mushroom cover with onions. If the onion turns blue-brown, it proves that it is poisonous, otherwise it is nontoxic. 7. Try cooking. When cooking wild mushrooms, put some rushes, a little garlic or rice to cook together. After the mushrooms are cooked, the rushes turn blue-green or purple-green, which is toxic, and yellow is non-toxic. Garlic or rice is toxic when it changes color, but it is non-toxic when it remains unchanged. 8. Chemical identification. Take the collected or purchased suspicious mushrooms, take out their juice, soak them in paper, and immediately add a drop of dilute hydrochloric acid or white vinegar. If paper turns red or blue, it will be toxic. Personally, I suggest not to eat the mushrooms in the picture.