Cabbage root swelling disease is very harmful, how to prevent and control cabbage root swelling dise

Cruciferous root swelling disease can occur on cabbage, greens and other crops. Rhizoma is a plant disease caused by the rhizoma brassica. The pathogen overwinters in the soil or adheres to the seeds in dormant sporangia and can survive in the soil for 10 to 15 years.

The sporangia borrow rainwater, tumor disease is more common in the roots of cabbage, from the seedling stage of cabbage to the seedlings are damaged, pull out the roots of cabbage, it is not difficult to find, there are different sizes of nodules, distributed on the root system, the nodules on the main root are large and few, the nodules on the lateral roots are many and small, showing irregular shapes and round balls.

Rhizome, also known as asparagus root, is a fungal disease that cruciferous vegetables such as cabbage are prone to, and the real culprit is Brassica rhizome. Root rot is a devastating disease in the world, not only for Chinese cabbage, but also for the host plants include Chinese cabbage, mustard greens, and the surface of the tumor in the early stage of the disease is smooth and clean, and the surface layer is not smooth, convex and uneven, and significantly cracked in the middle and late stages. The malignant tumors of the taproot are as large as raw eggs, and the total number is reduced, the malignant tumors of the main root are not large, and the malignant tumors of the root tendrils are usually in a string, and the large ones are as large as 20.

A disease prevalent in vegetables, the pathogen is mainly Brassica rhizome in the subphylum Flagellella. In China, it mainly harms cruciferous vegetables such as Chinese cabbage, greens, and mustard greens. After the crops are infected by rhizome fungus, they form a variety of sizes in the roots.

1. Smooth or cracked and rough tumors. In the early stage of the disease, the blight generally occurs at the base of the stem of the plant at the earliest. And the leaves above the diseased part turn yellow and wilt.

In the later stage, the leaves turn yellow-brown, and most of them die and remain on the branches without falling off. In the later stage, black-brown sclerotia of different sizes are often formed on the surface of the diseased area.

A variety of tumors of various sizes form in the roots. The symptoms on the ground in the early stage of the disease are not very obvious, and the cabbage will be deficient in fertilizer in the later stage of the disease, which makes many plantings mistakenly think that it is a lack of fertilizer. In severe cases, the leaves are yellow and weak, and gradually wilt and die.

It is normal for the seeds to wilt a little, when the sun has not risen to water the vegetables once, the next day will not wilt, sometimes the leaves of the vegetables are wilted, it is still wilted after watering, and the roots may appear to have pests and diseases, and it is necessary to hit a pesticide in time to keep the growth of the cabbage.

Cabbage root swelling is one of the common diseases, which can damage the roots, causing a large number of nodules to grow in the roots, affecting growth. Therefore, after the disease is discovered, chlorothalonil wettable powder or cyanogluzole suspension, quinoxethone wettable powder and other agents can be sprayed for prevention and control and control of the disease.

Pay attention to field management and rotation sowing, as well as timely fertilization.

Pesticides. Because my cabbage was treated with pesticides, the root swelling was cured, so pesticides should be used to prevent and control it.

Cabbage is one of the common vegetables in everyone's daily life, and the total area of cabbage grown in China is common and the production volume is large. In the planting process, it is more common to encounter cabbage root swelling disease, cabbage root swelling disease is often confused with less water, if not treated properly in time**, it will lead to cabbage roots can not absorb water, which seriously affects the production, sales and quality of cabbage. So how to do cabbage root swelling?

Next, let's take a look at the prevention and control measures of cabbage root swelling.

Root swelling disease is a fungal pest and disease, which cannot be observed normally in the early stage of the disease, and bacteria will invade the roots of cabbage, resulting in malignant tumors of various sizes in the roots. When the disease occurs for more than half a month, the plants on the road will slowly wither, the growth and development rate is very slow, and the growth and development will stop immediately after the disease. Then the leaves slowly turn yellow, and dry disease occurs, which is the most likely case to deceive farmers, and many people believe that it is caused by lack of water.

In fact, it is because the malignant tumor of the root is too large, which causes it to be unable to absorb water normally, and then the disease of dryness occurs.

There are only two factors that cause malignant tumors in the roots of cabbage, the first is caused by downy mildew eating the roots, which eats the roots and slowly swells the roots. If you find that there is no downy mildew when you pull out the disease, you can apply microscopic examination, if you see the presence of 5-6 side type bacteria, then it is likely to be the brassica rhizome that causes root swelling disease. Brassica rhizome is mainly ambushed in the soil environment, and then dispersed according to various substances such as diseased plants and moisture, resulting in large-scale root swelling disease in cabbage.

The incidence of rhizome disease in the disease is small, but according to experimental research, there have been cases of rhizome disease in every region in recent years, and it is still increasing. Brassica rhizome can survive in the soil environment for a long time, as long as the cruciferous vegetables and fruits are planted, it will develop diseases from time to time, and can also be dispersed with various insects with the help of fertilizer and water mobility in the soil layer. In particular, the disease is more severe when the temperature is rainy and the fields are relatively wet, and the spring of each year is the period when root swelling is common.

In the process of taking seeds, we must select the species with strong disease resistance, and then do a good job of disinfection and sterilization of the seeds, and can use the double granules of seed dressing for seed dressing. Heavy stubble can not be implemented, the crops in front of the soil layer are cruciferous and planted as much as possible, and some fruits and vegetables can be planted in rotation. For the planting land, it is necessary to carry out disinfection and sterilization, do a good job in prevention work, disinfect and sterilize on time, and strengthen the management methods of vegetable gardens.

The above is about the pathogenesis of cabbage root swelling disease, the law and its prevention and control countermeasures, to select the resistant species for planting, before sowing to disinfect and sterilize the seeds and soil, can not carry out heavy stubble, to prevent rotation with cruciferous green plants.

1.It is strictly forbidden to transport seedlings and vegetables from the sick area, 2Moisten the irrigation so that the pH is kept in between, 3Choose disease-resistant varieties. 4.Crop rotation and stubble. 5.Eradicate cruciferous weeds in the field in a timely manner.

The root disease of cabbage mainly harms the roots of cabbage, which will lead to different sizes of taproot or taproot, and prevention can be selected to pre-seedling in disease-free land or newly cultivated land to improve alkalinized soil planting.

It may cause uneven surfaces, which may affect nutrients, may weaken growth, and will lead to the death of seedlings. At this time, it is necessary to use pesticides in a timely manner, and also remove the problematic parts.

It can cause uneven ground surface, affect nutrients, weaken growth, and cause seedlings. Be sure to make pesticides in time and drop the problem part.

More than 4,000 kg of rotting farmhouse fertilizer is applied per mu, and 40 kg of phosphate fertilizer and 10 kg of potassium sulfate are applied together with farmhouse fertilizer. Top dressing with sesame cakes, the baby cabbage tastes fragrant and has a better taste. Cooking soup and stir-frying are relatively bad.

If you use compound fertilizer or urea top dressing, although the cabbage grows quickly, the taste is not good, as if it has the smell of ammonia. When stir-frying, it is not rotten and does not have that fragrant taste.

The growth period of cabbage is generally divided into several stages, such as germination stage, seedling stage, rosette stage, and bulb stage. Among them, the cabbage in the germination stage, seedling stage and rosette stage can be called small cabbage. Most of the cabbage planted after the beginning of autumn is now in the middle and late stages of the seedling stage.

For transplanting seedbeds, 2 seedling thinning should be carried out. Once is within 6 10 days after the emergence of seedlings, when the seedlings have 1 2 true leaves, the first seedling, and then the second seedling after 5 7 days, this time the seedlings are left strong and the weak seedlings are removed.

To reapply top dressing once, mix 10-15 kg of urea, 10 kg of superphosphate and 10 kg of potassium sulfate per mu, and apply it with water to promote the vigorous growth of rosette leaves. In case of rain, dry fertiliser can be applied, but it must be kept away from the roots and covered with soil immediately. Chinese cabbage is also a vegetable that is eaten more in autumn and winter.

People also love to eat, but also because Chinese cabbage is full of water, sweet after eating, looks white, and is not washed, and it is easy to cook, so some people jokingly call Chinese cabbage the "main dish" of the canteen. However, this is also the advantage of Chinese cabbage.

If the base fertilizer is sufficient, the seedling fertilizer can be applied lightly or without application. Generally, fast-acting nitrogen fertilizers such as urea and ammonium sulfate per mu. For example, 5 kg of urea per mu, or about 10 kg of ammonium sulfate.

The topdressing time is when the Chinese cabbage seedlings are 3 to 4 leaves. We also need to choose watering according to the moisture of the soil, and we can't apply it at will. Special attention should also be paid to watering, as the weather gradually cools down, watering at this time is also particular.

During the rosette period, we must pay attention to water control.

This disease is caused by infection with fungi, and carbendazim can be tried to prevent and control it, and it is generally enough to spray twice.

Pesticide control: pentachloronitrobenzene has a good effect on the prevention and control of root swelling, and the application method is to apply uniform strips on the furrow surface before cultivation, and use one kilogram per mu. It is also possible to use 75% pentachloronitrobenzene wettable powder 700-1,000 times and pour kilograms of liquid medicine per hole before transplantation.

Or when a small number of diseased plants are found in the field, they should be watered with medicated solution.

1. Do a good job of cultivation and disease prevention, choose sunny days for planting, when planting or soon after planting, rain with 1 lime water or 2 oyster shell water as root water and continue to drench 1 2 times after survival; remediate the drainage and irrigation system, and implement high-furrow and deep-furrow cultivation; Formula fertilization, application of rotted net fertilizer. Pay attention to field hygiene, collect and burn diseased residues at harvest; Eradication of cruciferous weeds in the fields. 2. Usually use 75 pentachloronitrobenzene to apply or strip (kilogram ha) or 700 1000 times liquid (kilogram cavity).

My family has several vegetable plots, all of which are planted with some common vegetables, if they are planted continuously, root swelling disease will occur, usually we see that the seedlings of diseased vegetables are short, and when they encounter sunlight, the leaves will wilt; Pull out the vegetables, you can see the roots grow a bunch of nodules, before the sowing in the ground evenly sprinkled with lime, in the machine to dig the land again, after ten days can be sown, sprinkled in the ground lime can effectively kill all pests and germs.

<> do a good job in soil improvement, increase the use of organic fertilizer, adjust the pH, balance the use of elements, increase the number of beneficial bacteria in the soil, and control humidity and temperature. Root swelling is most severe in cool, poorly drained acidic to neutral soils. This disease can be prevented by transplanting seedlings without disease, planting them in pure soil and preventing pollution.

It is also possible to apply a large amount of hydrated lime 6 weeks or more before planting, and use fungicides in the transplanting water to plant disease-resistant varieties.

Root swelling is most severe in cool, poorly drained acidic to neutral soils. This disease can be prevented by transplanting seedlings without disease, planting them in pure soil and preventing pollution. It is also possible to apply a large amount of hydrated lime 6 weeks or more before planting, and use fungicides in the transplanting water to plant disease-resistant varieties.

Application of biological fertilizer, seed treatment, etc. The application of biological fertilizer selects the diseased plots without taking any prevention and control measures, and applies biological fertilizer Heshenyuan, Kunqier, Manyuanchun, and Gymboree respectively to supplement the beneficial bacteria.

One is to implement crop rotation with non-cruciferous vegetables; the second is to find that the diseased plants are removed in time, and the diseased plants are burned or buried deep in the field; the third is to apply lime to adjust the pH of the soil, generally 75 100 kg of lime powder per mu; the fourth is to mix grass and wood ash with soil and cover seeds; Fifth, reasonable fertilization. Improving the soil, combined with land preparation in acidic soil to apply 100-150 kg of quicklime per mu, neutralizing soil acidity, increasing calcium content, and combined with deep tillage, more organic fertilizer, can effectively reduce the disease. In addition, according to the soil chemistry test of Zhejiang University, the damage of nematodes is controlled from the original head, various soil-borne diseases and virus diseases are prevented, and the quality is improved, the production and income are increased.

It is also possible that this disease occurs because he does not fertilize regularly, and he does not receive enough sunlight, so he must take care of it and fertilize him regularly to ensure water and sunlight.

It may be because the seeds are not selected when the excellent varieties are not selected, the soil is very firm, which is not conducive to the growth of Chinese cabbage, it may be that there is no regular pest removal, usually to carry out more fertilizer and watering, buy some pest prevention sprays for spraying.

It may be that the excellent varieties were not selected when selecting the seeds, and the soil is very firm, which is not conducive to the growth of Chinese cabbage. It may be that the pests are not removed regularly, so you should usually apply more fertilizer and water more, and buy some sprays to prevent pests and spray.

Improving the alkalized soil, drying the soil, and then using some quicklime powder appropriately, and using disease-resistant varieties can all prevent cabbage root swelling.

Quarantine and closure of affected areas: Although root swelling has been detected in many areas, there are still some areas that have not been detected nationally. Some provinces and municipalities are also only found in a small area.

Therefore, it is very necessary to implement quarantine, seal off the sick area, and strictly prohibit the transfer of vegetables and seedlings from the sick area to the disease-free area.

You sterilize the seeds first. Then do some crop rotation on some of the sick land. Be sure to disinfect some of the seedbeds.

Fertilize with some appropriate drugs. For some diseased seedlings, it is necessary to control them from the roots. Weeding should be done regularly, so that cabbage root swelling can be prevented.