What are the black dots on bok choy? Note that there are black spots on the cabbage

There are black spots on the Chinese cabbage, which means that the cabbage has black spot disease.

Symptoms: This disease can damage the leaves, petioles, peduncles and seed pods of plants. The leaf disease mostly starts from the outer leaves, the lesions are round, gray-brown or brown, with or without obvious concentric ring patterns, and black mold is produced on the lesions, which is more obvious in humid environment.

There is sometimes a yellow halo around the lesion.

Teach you what the black dots on Chinese cabbage are.

The black spots of cabbage are calcium deficiency, and the production of these small black spots is actually a vegetable disease, called "sesame disease". When Chinese cabbage has "sesame disease", a large number of black or black-brown sesame spots will appear on the petiole and veins, and there is no mold or decay attached to the spots, mainly concentrated in the epidermal cells of the petiole. "Sesame" is a physiological disease, not a germ, mainly because of the lack of light caused by calcium deficiency, may also be because of too much nitrogen fertilizer caused by physiological metabolism abnormalities, affecting the absorption of calcium, although the appearance of the product has deteriorated, but does not affect the consumption.

Small gray-brown dots will appear on the inner leaves, small black spots will be produced on the leaves by black spot of the large white hidden friend, and small black spots or fine black streaks will also appear on the true leaves and leaf veins of the Chinese cabbage. In fact, it doesn't matter if you eat it, a lot of cabbage in winter is like this. It may also be insect spots, which are the traces left by the insects after crawling their fingers, and there are insects that indicate that there are not many pesticides, which can be eaten, and if you feel that it affects your appetite, you can remove it.

Sometimes there are no black spots when the cabbage is just bought back and brought back, and it has been left for a long time, and this situation does not affect the consumption. In addition to cabbage, cabbage-based vegetables are also more likely to produce black spots, such as cabbage.

Traditional Chinese medicine believes that cabbage is slightly cold and sweet, with the functions of nourishing the stomach, removing annoyance and quenching thirst, diuretic and laxative, clearing heat and detoxifying, etc., which can improve the physique of yin deficiency and fire, and assist in diseases such as hot showering. Folk are known as "fish make fire, meat produces phlegm, cabbage and tofu keep safe".

What exactly is the little black dot on Chinese cabbage?

The small black dots on this Chinese cabbage are called by their scientific name"Chinese cabbage small black spot disease" or "Chinese cabbage sesame spot disease"., often occurs on the inner side of the petiole of Chinese cabbage, mainly concentrated in the epidermal layer cells, and rarely also occurs in mesophyll cells, the size is about 1 2 mm, and some lesions need a magnifying glass to be visible.

To put it simply, the small black dots on the white cabbage are actually caused by the distortion and deformation of the cell wall of some diseased Chinese cabbage petioles and vernal cells, and the accumulation of a lot of black material in the distorted and deformed places.

It is this abnormal cell wall structure that forms small black dots on the cabbage, which makes the cabbage look mottled and its appearance decreased.

Why do you have little black spots?

One possible reason for the small black dots on the Chinese cabbage is:Excess nitrogen fertilizer, because excessive nitrogen fertilizer will directly lead to the destruction of cell membrane structure.

Some studies have found that small black spot disease will worsen with increasing nitrogen concentration.

In addition, these black spots on the cabbage may also be related to the following factors:

First, the storage and transportation process. Chinese cabbage small black spot disease can also be aggravated during storage, and even Chinese cabbage without symptoms at harvest can occur during storage and transportation.

Second, it is related to Chinese cabbage varieties. The differences between different genes of nuclear and repentant Chinese cabbage provide a basis for the breeding of resistant varieties.

How to reduce the occurrence of small black dots?

Understanding the causes of small black dots on cabbage, we can take targeted measures to reduce the probability of small black dots or even avoid their appearance.

The following methods are beneficial to avoid unsightly black spots on the cabbage:

Organic fertilizerBeneficial for reducing black spot disease. Studies have suggested that the application of organic fertilizer can help reduce the occurrence of small black spot disease.

Different harvesting methods will also affect the probability of small black spots in cabbage storageHarvest and store with outer leaves, small black spot disease is less likely to occur.

3 Store under 4 conditionsIt is beneficial to reduce the appearance of small black dots.

The black spots on the Chinese cabbage may be a physiological disease of the Chinese cabbage, which generally does not have a greater impact on the body. There are black spots on the Chinese cabbage, if there is a deterioration of Tongsong, there may be more bacteria, it is generally not recommended to continue to eat, continued consumption may lead to the invasion of bacteria in the Chinese cabbage into the body, and infection to the gastrointestinal tract, easy to cause diarrhea, vomiting, abdominal pain and other uncomfortable symptoms.

There are black spots on Chinese cabbage, which may be due to excessive fertilization or insufficient water during the growth period of Chinese cabbage, which leads to physiological diseases of Chinese cabbage and causes black spots on Chinese cabbage. If there are black spots on the Chinese cabbage, but there is no deterioration of the pants, it will generally not produce harmful substances and will not have a greater impact on the body, so it can be eaten in moderation. Chinese cabbage contains more nutrients such as vitamin A, vitamin K, carbohydrates, etc., and moderate consumption can supplement certain nutrients for the body.

What are these black dots on the Chinese cabbage? When we encounter these cabbages, do we buy them or don't buy them? Can you eat these cabbages? The answer was immediately revealed.

In addition to revealing the answer to you, I also want to share with you a favorite cabbage recipe, that is, cabbage stewed vermicelli. This home-cooked dish in winter is delicious and delicious, so let's take a look.

The little black dot on the cabbage, what kind of mountain core is it? Can you eat it? To buy or not to buy?

1. The generation of black spots.

There are 4 main types of black spots on cabbage. The first situation is that the black spots on the cabbage are not actually black spots, but some insect eggs or insect feces, which can be cleaned by rubbing them with water.

The second situation is that the cabbage is sick, because the cabbage is easily affected by the environment in the process of planting, such as drought, heavy rain, lack of nutrition, etc., which will lead to the phenomenon of black spots in the cabbage.

The third situation is mainly due to the fact that the cabbage has deteriorated due to long-term storage, and the dark spots on the surface of the cabbage will be particularly obvious. The size of the black spots is as large as the size of black beans, and it is especially noticeable when compared to the black spots under normal conditions.

In the fourth case, the cabbage is medicated. Because there are many businesses in the market now, in order to improve the preservation time of cabbage, they will spray some hormones and pesticides on cabbage. Although such cabbage looks fresh from the outside, it has begun to rot on the inside, and large areas of dark spots will appear on the cabbage.

2. Can you eat black-spotted cabbage?

Combined with the generation of black spots of cabbage, when we buy cabbage, if the black spots on its surface are not too large, such cabbage can be purchased with confidence. Because such cabbage belongs to the cabbage that is teased or under normal circumstances, it will not affect the consumption of cabbage.

On the other hand, if the black spots on the cabbage are the size of black beans, or if there are large areas of black spots, don't buy such cabbage. Because once the cabbage begins to deteriorate, toxic substances will be produced inside, so don't eat such cabbage, it will have an impact on the human body.

The black dots on the Chinese cabbage have the following vertical clumps:

1. The black spots only grow on the green leaves, which can be rinsed off with water, which is the feces of the cabbage worm dregs, etc., in this case, it means that the cabbage is not pesticides, as long as it is carefully rinsed, it can be eaten.

2. The black spots grow on the green leaves and cabbage on the Yuzhen cherry, and they can't be washed off with water. This is the black dot that grows in the fiber of cabbage, which is commonly known as cabbage disease, which may be caused by environmental factors such as drought and low temperature.

3. The black spots appear larger, and black spots have been formed, which cannot be washed off with water. This is due to mildew caused by improper storage, in which nitrates are converted into toxic nitrites.

The black spots on the cabbage may be a physiological disease.

In the cultivation process, when excessive nitrogen fertilizer is used, cabbage is prone to black spots.

Another possibility is that the cabbage is infested with aphids, and these black spots are aphid carcasses that grow into the cabbage as the cabbage grows.

It is also guessed that Zheng Huai may be a friend of the cabbage that is not stored properly, and when it rots, it is also easy to grow black spots.

The first cause of orange disturbance is that some Chinese cabbage leaf cells have deteriorated, and small black dots will be formed. Ordinary people often call black spot disease.

The second round denier is that after nitrogen fertilizer during the growth of cabbage, the cell membrane of cabbage is destroyed, so that small black spots will appear.

The third infestation of aphids, cabbage in the process of growth. It will be attacked by aphids, and the aphids will eat some vegetable leaves, and the aphid secretions will be left on the nucleus of the vegetable leaves, and slowly grow up with the cabbage little by little, forming dense small black spots.

The black spots on the Chinese cabbage are the excrement residues of the cabbage insects, and they can be cleaned up with a brush when washing.

The black spots that are often seen in the part of Chinese cabbage leaves near the cabbage are not symptoms of the pathogenic bacteria, but because of the burden brought by the cultivation environment to the cells, resulting in growth pressure, or because of too much fertilizer, nutrient balance destruction, excessive absorption of nitrogen limb compounds, and other cell wall blackening caused by the original companion limbs. It's no problem to be able to eat.

If there is a black spot, it is about to break, and it has been put for a long time.