What are the factors related to root rot during the growing period of Chinese cabbage?

Root rot is a common disease of Chinese cabbage during planting, which will lead to the gradual death of Chinese cabbage, which seriously affects the yield and quality, and reduces the economic benefits of farmers. So what are the factors that cause cabbage root rot? How to prevent it?

1. Chinese cabbage is a moisture-loving vegetable that likes moist soil conditions, but is not waterlogged, such as in the high temperature season, encountering continuous cloudy weather, and excessive soil water accumulation during heavy rain, which will lead to hypoxia of cabbage roots, root cell death, and rooting.

Prevention and control measures: Plot selection. Choose a plot of land with high terrain and good drainage for sowing or planting to avoid standing water and roots.

Proper shading. In the early stage of Chinese cabbage growth, in case of high temperature weather, shade nets can be used to properly shade to prevent the formation of high-temperature roots.

Cultivating loose soil. By cultivating and loosening the soil, the soil aeration is increased and the activity of good gas microorganisms is promoted. Cultivating can also regulate soil moisture and facilitate root extension; In the later stage of Chinese cabbage growth, cultivating is also conducive to increasing ground temperature.

Control soil moisture. Drain water in time when it rains, so that there is no stagnant water when the rain stops. When the soil is short of water and needs to be watered, the amount of water should be appropriate, and it is strictly forbidden to flood irrigation, so as not to cause root accumulation caused by stagnant water.

2. Root rot caused by soft rot is also one of the causes of root rot of Chinese cabbage, when nitrogen fertilizer is applied too much, the plant suffers from insect wounds or other mechanical wounds, it is easy to cause the pathogen to infiltrate and be infected with soft rot, and the heart Sui tissue and petiole base at the rhizome are completely rotten. Generally, low-lying plots with severe water accumulation are prone to disease.

Control measures: Avoid planting on low-lying plots, and avoid Solanaceae, melons and fruits and cruciferous vegetables before planting crops.

Implement ditch irrigation to prevent flood irrigation; Farming operations should be careful to avoid causing plant trauma, and Chinese cabbage should also pay attention to timely prevention and control of underground pests in the early stage.

Pay attention to the frequent observation of the plants in the field, and remove the diseased plants in time once they are found.

At the onset of the disease, it can be treated with agricultural streptomycin sulfate or neophytomycin spray, once a week, and sprayed 2 or 3 times continuously depending on the condition.

Root rot of Chinese cabbage is a very common condition, which can seriously affect the growth of Chinese cabbage and lead to the death of Chinese cabbage. Cabbage is a colder vegetable and prefers mild, cool climates. It is particularly sensitive to hot and cold weather, and prefers humid environments.

However, if there is too much water in the ground, waterlogging will occur. At this time, it is easy to have roots.

Applying too much water or fertilizing too much, too much water will cause water to soak rotten roots, and too much fertilization will cause the soil to be fertile and fertile to soak rotten roots.

The first is related to germs, and the second is that it may be due to the excessive use of chemical fertilizers, and it is also related to climate change. Before planting Chinese cabbage, the seeds should be dried for one day.

Chinese cabbage is a vegetable that we often eat, which is grown in almost every household in the countryside and is also one of the common bulk vegetables in the market. Because Chinese cabbage has undergone high temperature in autumn and then exercised at low temperature, it needs more water and fertilizer, and once it is not properly managed, there will be a variety of pests and diseases. Chinese cabbage looks bright from the outside, but it is not uncommon for it to rot on the inside, mainly due to the following two diseases.

First, soft rot.

Soft rot is a bacterial disease that occurs mainly in the centering stage of Chinese cabbage. The most common symptom is that the base of the petiole and the heart tunnel tissue decay and turn into a viscous substance that emits a disgusting odor.

Because soft rot is a bacterial disease, all decaying tissues contain a large number of pathogenic bacteria, which will cause the spread of water or scavenging insects, which is extremely harmful.

For the prevention and control of this disease, in addition to doing a good job in water and fertilizer management, it is not to flood irrigation, and there can be no stagnant water in the field, and bacterial fungicides such as ammonium dyssen, copper hydroxide, copper sulfate, and copper ammonia can be sprayed to prevent and control the disease in the early stage of the disease.

Second, dry rot.

Chinese cabbage dry rot, also known as dry heartburn, is a physiological disease. The symptom is that the internal leaves of the Chinese cabbage are dry rot, as if they have been roasted, and lose their edible value.

The main cause of Chinese cabbage dry rot is the problem of water and fertilizer. For example, the soil is deficient in calcium, and the water is insufficient in the core stage.

For the problem of dry heartburn of Chinese cabbage, fertilizer and water management should be strengthened, such as soil topdressing with calcium fertilizer, boron fertilizer, etc., and foliar spraying with calcium.

In the heart-wrapping period of Chinese cabbage, it is the critical period of its water needs, and it is necessary to keep the ground not dry, generally watering once every 7 days or so. If there is a lack of water at this stage, it is not only prone to dry rot, but also affects the core of the Chinese cabbage, resulting in the plant being compact and not loose, which is what we often call the loose leaf cabbage.

In short, the phenomenon of Chinese cabbage is bright and ruined, which is roughly these two situations, you can combine the symptoms to determine whether it is a bacterial hazard or a physiological disease, do not delay the first time.

The reason for the root is that Chinese cabbage is a semi-hardy vegetable that prefers warm and cold climates, but is not tolerant to heat and cold. At the same time, Chinese cabbage prefers moisture, but is not tolerant of waterlogging. Under the conditions of high temperature, high temperature or low temperature, and cold, in case of continuous rainfall or flood irrigation, Chinese cabbage will be in a state of stagnant water for a long time, which will lead to necrosis of Chinese cabbage root tissue and root soaking due to lack of oxygen.

In the early stage of Chinese cabbage growth, due to the high outside temperature, it is easy to have high-temperature roots; In the later stage of Chinese cabbage growth, as the outside temperature decreases, it is easy to have low temperature brewing.

Rooting symptoms: The roots of the Chinese cabbage are rotten, the aboveground parts are wilted, the leaves are yellow, and severe dead trees appear. Precautionary measures: Choose a plot with high terrain and good drainage for sowing or planting to avoid root soaking caused by standing water. Proper shade In the early stage of Chinese cabbage growth, in case of high temperature weather, you can use a shade net to properly shade the sun to prevent the generation of high temperature roots.

tillage and loosening soil to increase soil aeration and promote aerobic microbial activity; Cultivating can also regulate soil moisture status, which is conducive to root extension; In the late growth stage of Chinese cabbage, cultivating is also conducive to increasing ground temperature. Control soil moisture and drain water in time after rain to prevent water accumulation. When the soil is short of water and needs to be watered, the amount of water should be appropriate, and it is strictly forbidden to flood irrigate with water, so as not to cause water accumulation.

In production, Chinese cabbage root rot mostly occurs on plots with high humidity in the field.

Since Chinese cabbage root rot basically occurs in cool weather, the humidity is relatively high. For example, the water is large, which invisibly increases the humidity in the field. And Chinese cabbage grows fast and needs more water and fertilizer, so with a little drier, farmers don't just go to irrigate.

Therefore, due to the excess soil moisture in the field, Chinese cabbage often develops root rot, and with the spread in the field, the disease phenomenon will appear. Therefore, the rotten roots of cabbage can also be attributed to root rot or dipping. There are many root rots in Chinese cabbage planting, how to prevent and control them?

How to avoid cabbage root rot The reliable way to solve the problem of Chinese cabbage root rot is to start with cultivation measures, such as Chinese cabbage long pile planting, avoid planting in low-lying places, avoid water accumulation in the field, cause excessive soil moisture in the roots, and at the same time the whole land should be flat to avoid unevenness. After watering, the water flow in the field is even, avoiding local water accumulation. At the same time, the field drainage performance is better.

For example, it often rains, and the water in the field can be drained in time under the changing situation, which can also greatly reduce the occurrence of root rot. But the most important thing is that all friends who grow cabbage should pay attention to small-scale irrigation when watering, preferring to water it less than on a large scale. At the same time, if the disease is severe in the field, it is also necessary to consider buying disease-resistant Chinese cabbage varieties when planting Chinese cabbage.

During the onset of soft rot in the field, streptomycin sulfate can be sprayed**, and two or three consecutive sprays can reduce the symptoms of the disease in the field. To sum up, in fact, we still focus on the management of Chinese cabbage root rot. Scientific watering and fertilization and timely field management can greatly reduce the incidence of cabbage root rot in the field.

Therefore, it is recommended again that friends who plant Chinese cabbage should go on field trips every three or five times as much as possible, pay close attention to the growth of the field, and take medicine in time to prevent the spread of the disease once it is found.

In the early stage of Chinese cabbage growth, due to the high outside temperature, high-temperature roots are prone to appear. In the late growth stage of Chinese cabbage, with the decrease of the outside temperature, it is easy to appear low-temperature roots.

If the Chinese cabbage rots the roots, it can affect the yield, but there are many ** that generally cause the cabbage to rot the roots, the first is the climate problem, and the second is that the fertilizer is not applied at the appropriate time.

Cabbage root rot is a common disease, and there are many causes of this disease, including root rot caused by physiological diseases, and pathological root rot caused by soft rot. This has a lot to do with excessive rainfall, high soil moisture, and high and low temperatures. Cabbage belongs to the cold vegetables, the suitable temperature for growth is 10 22, not heat-resistant, when the temperature exceeds 32, the photosynthesis is very weak and the respiration is enhanced, and the growth is very weak.

Chinese cabbage is a moisture-loving vegetable, and moist soil conditions are required throughout the growing season, especially Chinese cabbage can not lack water in the rosette stage and the core stage. Cabbage is also not resistant to waterlogging, and long-term water staining will also cause the roots to die. Because in the high temperature season, if there is continuous rain, the soil is full of moisture, lack of oxygen, and the roots of cabbage have anaerobic respiration, which will lead to the death of root cells.

When the seedling is sick, the base of the stem is water-soaked, rotten roots, lodging, and star-studded. When the adult plant is sick, the outer leaves wilt during the day, recover at night, and then gradually die from the outer leaves. The roots turn brown and rot, the middle of the roots shrinks, and the lower part disappears, leaving only the upper half.

Chinese cabbage has rot inside, usually a symptom of cabbage soft rot or lack of nutrients, Chinese cabbage soft rot is also a disease that Chinese cabbage is prone to, the main reason is that the Chinese cabbage is infected by bacteria and the disease occurs, this pathogenic rapid grinding letter fungus is usually in the early stage of Chinese cabbage growth, and the insects are carried into the mu when they are harmed.

If the Chinese cabbage is good on the outside, it is likely to be caused by excess water or short sunshine hours on the inside.

Cabbage is a colder vegetable and prefers mild, cool climates. It is particularly sensitive to hot and cold weather, and prefers humid environments. However, if there is too much water in the ground, waterlogging will occur.

This can happen when the weather temperature is particularly high or low at the time of planting, and it is cloudy and rainy in the season. There is too much water in the soil, so the roots of the cabbage will die due to lack of oxygen, and the roots are prone to soaking.

Chinese cabbage is a semi-cold-tolerant vegetable, which likes mild and cold climates and is not tolerant to heat and cold, while Chinese cabbage likes humidity but is not resistant to waterlogging. Under the conditions of high temperature and hot or low temperature and cold, in case of continuous rain or flood irrigation, Chinese cabbage will be in a state of stagnant water for a long time, which will lead to tissue necrosis and root rot in the roots of cabbage due to lack of oxygen. In the early stage of Chinese cabbage growth, due to the high external temperature, it is easy to have high-temperature root rot. In the late growth stage of Chinese cabbage, with the decrease of the outside temperature, it is easy to have low-temperature root rot.

1. Temperature leads to rapid and slow growth.

Many people find that the growth of Chinese cabbage at this stage is significantly slower than in other periods. The growth of Chinese cabbage in all aspects is no different from that of previous planting, but the growth of Chinese cabbage is not good. In fact, it can be caused by temperature.

We all know that the temperature in early spring is not very stable, but the growth of Chinese cabbage requires a relatively stable temperature. It grows fast when the temperature is high and grows slowly when the temperature is low. For example, when the spring season is high or low, the growth of Chinese cabbage will change.

It's going to get faster and slower, and it takes time to get used to. This leads to a gap between the growth of Chinese cabbage and other periods.

2. The survival rate after seedling emergence is low.

The problem of low survival rate after emergence is also common. Most seeds germinate after sowing, but begin to die in batches after emergence. This situation is usually caused by the environment.

As mentioned above, the temperature is unstable in early spring, and the cabbage seedlings themselves are relatively fragile. The external environment changes frequently, and the seedlings will not be able to tolerate this change and eventually die. Due to the barrier of the soil, the seeds are able to germinate, giving the seeds a relatively safe space.

The emergence of cabbage is in direct contact with the outside world, which is one of the reasons for the high mortality rate after the emergence of cabbage.

3. Too much water.

During this season, there is comparatively more rainfall. In addition, there is a lot of farmland that needs to be prepared for spring planting. Everywhere began to store water for farming.

I'm sure we all know the dangers of too much water. In addition, many people have not had time to improve their drainage channels shortly after the start of spring, which makes the accumulation of water even more serious. Therefore, it is necessary to prepare for waterproofing before planting Chinese cabbage and prepare for drainage after planting, otherwise these Chinese cabbage may be planted in vain.

4. The rot is very serious.

Cabbage rot is also a common problem this season. One is water rot, and the other is soft rot, the former is caused by excessive precipitation, and the latter is a latent disease of the cabbage that slowly recovers and erodes at this time. At this time, insects are not very common, so it is best to focus on preventing both.

In the case of the rapid onset of water soft rot, we should pay more attention to whether there is such a situation in the vegetable field.