1. Tricholoma has black fluff under the umbrella. If there is only one layer and there is nothing unusual to the touch, it means that Tricholoma is old and edible. The nutritional value and taste of Tricholoma in this case have not been greatly affected, and it can be eaten.
2. If there is a large amount of black fluff in the circle of Tricholoma, and it feels sticky, it means that Tricholoma is broken and can't be eaten. This kind of Tricholoma may have deteriorated, which is harmful to health after eating.
Therefore, if there is a circle of black fluff in Tricholoma, it is recommended to observe its quantity and touch first. If there is only one layer and there is nothing else unusual, it can be cleaned and eaten. If the black fluff is thick and sticky, it is recommended not to eat it, so as not to affect your health.