Napa cabbage: Navigating the mystery of black spots
At first glance, it looks appealing, with its firm, green leaves. However, once you cut open napa cabbage, dark, unappetising spots may become apparent. This isn't always a sign of spoilage.
Napa cabbage is a key ingredient in many delightful salads and makes an interesting substitute for white cabbage in stuffed cabbage rolls. It's available in shops all year round, so we often eagerly add it to our shopping baskets. Even the most attractive-looking cabbage from the outside can turn out to be speckled with black dots. These aren't visible at first glance, but once cut open, everything becomes clear. Many people immediately discard it, blaming the shop where they bought the defective cabbage. However, it doesn't need to be dismissed straight away.
What do the black spots on cabbage mean?
Black and black-brown spots on napa cabbage are most often the result of a physiological plant disorder known as pepper spot. The main cause is prolonged storage of cabbage, especially at low temperatures. Additionally, the appearance of spotting is influenced by the harvest time of the cabbage (immature specimens are more susceptible), growing conditions (such as periods of drought), and improper fertilisation (excess nitrogen).
The spots are superficial, dark, and small. This disorder is not caused by pathogens (fungi, bacteria), so such cabbage is not dangerous. This differs from black rot, a fungal disease caused by fungi from the Alternaria genus. The spots on the leaves in this case are larger, irregular, dark brown or black, and can lead to the leaves rotting, often with visible fungal growth. Cabbage showing symptoms of this disease should not be consumed.
To eat or not to eat?
Pepper spot, which manifests as black dots, is a physiological problem mainly related to improper storage of cabbage. Black rot, on the other hand, is a fungal disease that poses a much greater health risk, and when present, the cabbage should be discarded without exception.
Expert opinions on consuming napa cabbage with black spots are divided. Some specialists believe that after removing the outer leaves and subjecting the cabbage to heat, it can be safely consumed, especially in cooked dishes such as soups or stews. Others advise disposing of it to avoid the risk of misidentifying the spots. The most important thing is to exercise caution. If you're unsure, it's better not to risk your health.
