If the black spots can be washed away, it is likely to be the feces of vegetable insects left on the surface of cabbage, or something like soil. If the black spot cannot be cleaned, it may be caused by excessive use of nitrogen and phosphorus fertilizer in the process of planting cabbage. What are the black spots on the surface of Chinese cabbage? Many people may have encountered some Chinese cabbage with many black spots on the surface. There are many reasons for the emergence of such black spots. If you want to distinguish which one it is, you must first see if it can be washed off the Chinese cabbage.
If these black spots can be washed down, they are likely to be the feces of vegetable insects left on the surface of cabbage, or things like soil. In this case, they can be eaten as long as the cabbage is cleaned.
If the black spots on the cabbage can not be washed off, it may be caused by the excessive use of nitrogen and phosphorus fertilizer in the process of planting. This substance will not cause harm to our body, but if you mind, you can pinch off the cabbage with black spots.