Many people ignore cabbage root swelling disease, how to identify cabbage root swelling disease?

It can be identified from the white appearance, because the cabbage with cabbage root swelling will have a lot of globular tumors and finger-shaped tumors, if these tumors appear, it means that the cabbage has been diseased, and it is necessary to carry out the cabbage in time.

The main way to identify it is that the cabbage is particularly sluggish when it should be grown, and. In the later stages, the leaves are always prone to yellowing and wilting, and there are also tumors of uneven size in the roots.

In the early stage of Chinese cabbage root swelling, the aboveground symptoms of the plant are not obvious, which mainly harms the roots, resulting in the appearance of finger-shaped, short-rod-shaped or spherical tumors of different sizes in the main root or lateral roots. The nodules on the taproot are close to the aboveground, and the surface of the nodules is smooth in the early stage of the disease, and the surface is rough, uneven and obviously cracked in the later stage.

Chinese cabbage root swelling disease is a serious soil-borne disease of Chinese cabbage, the fungus overwinters in the soil or adheres to the seeds with dormant sporangia, and the tumors on the taproot are mostly close to the upper part, larger and less numerous, spherical or nearly spherical, uneven, rough surface, and sometimes the epidermis is cracked.

The spores of root swelling can be transmitted through soil, seeds, vegetables, agricultural machinery, means of transportation, irrigation water and rainwater, and other human factors, insect factors, etc. It mainly harms cruciferous vegetables such as Chinese cabbage, Chinese cabbage, cabbage, radish, rape, and rapeseed, and the most susceptible vegetable is Chinese cabbage. Because Chinese cabbage is a high-water and fertilizer crop, the tree body is fragile, and it is the most susceptible vegetable variety.

Cabbage root swelling is a fungal disease caused by Brassica rhizome, which can be spread through rainwater, irrigation water, agricultural tools and agricultural operations. It occurs only in cruciferous vegetables.

Tumor disease is mostly seen 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 and bumps, 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 shape and spherical host vegetables are infected by the root rhizoma fungus, the roots form tumors and gradually swell, deformed, the surface of the tumor becomes smooth and rough, and then cracked, uneven, often suffer from the infection of other miscellaneous bacteria and rot and stink.

In the early stage of the disease, the surface layer of the tumor 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. Carry out seed treatment, soak the seeds in 55 warm soup for 20 minutes, and stir the seeds constantly; 15 minutes of potassium permanganate solution soaking; 1 150 times lime water immersion 15 points; 70% chlorothalonil wettable powder 600 times liquid soaking for 20 minutes; Untreated seeds were used as a control.

The main method to prevent and control cabbage root swelling disease is to select excellent seeds for sowing and can not be cropped continuously, and implement crop rotation with non-cabbage vegetables for more than three years. The second is to use quicklime for disinfection and sterilization of the soil, and can neutralize the pH value of the soil. The important factors that cause this disease are soil temperature, humidity and pH.

When the soil pH is 18-25 or the water content is 70%-90%, it is more conducive to the infection of pathogens, and the soil rarely occurs this disease.

Apply well-decomposed organic fertilizer to avoid excessive use of chemical fertilizers to prevent soil acidification, and you can also apply quicklime during land preparation, which can improve the pH of the soil. Prevention and control methods: choose disease-resistant varieties.

Collect seeds on disease-free plots or disease-free plants to reduce the possibility of germs in seeds. Seed sterilization. Wet mix with seed weight of ethylene phosphorus aluminum, and then dry mix with 50% Fumei double dry mix of the same weight; or 45% dysenium 400 times liquid soaking.

Chinese cabbage root swelling disease is a fungal disease, the fungus remains in the soil with dormant sporangia or adheres to the seeds for overwintering, and is spread by rain, irrigation water, pests and agricultural operations, etc., and can survive in the soil for more than 10 years. Do a good job of seed disinfection. Before sowing, soak the seeds in 55 warm water for 15 minutes, then soak the seeds with pesticide solution for 10 minutes, wash and sow seeds.

Cabbage root swelling is easy to occur when acidic soil, soil temperature 19-25 and relative humidity are high. Cruciferous vegetable fields with continuous cropping and partial nitrogen fertilizer were prone to disease. In the early stage of the disease, the rooting agent amine fresh ester or 35-45 ml of pyroxystrobin per mu can be sprayed, or 50% methyl tobuzine wettable powder 500 times liquid or 50% carbendazim wettable powder 500 times liquid irrigation can control the spread of the disease. Crop diseases should be prevented in advance, and they can be soaked and disinfected with 50% carbendazim wettable powder 400 times before cabbage sowing.

Rhizomelody is a fungal disease that cannot be observed normally at the beginning of the disease, and the fungus will invade the roots of cabbage, resulting in tumors of various sizes in the roots. When the disease occurs for about half a month, the plants on the ground will gradually wither, the growth rate is extremely slow, and the growth will stop directly in the later stage. 1. Do a good job of seed disinfection.

Before sowing, soak the seeds with 55 warm water for 15 minutes, and then soak the seeds with 10% cyanofrostazole suspension 2000-3000 times for 10 minutes, wash and sow seeds. 2. Seedbed disinfection. The seedbed can be sprayed with 500 times of 50% sodium disulfonate soluble powder or 10% cyanofrostazole suspension 1000-1500 times of liquid, and the depth of soil is about 15 cm.

3. Seedling sterilization. Before transplanting, the seedlings should be soaked in 1500-2000 times of lime water or 10% cyanofrostazole suspension with appropriate concentration (15%) or watered with fixed root water to prevent pathogens from invading the root system.

Some pesticides should be used to prevent pests and diseases, and they should be watered frequently to keep them well hydrated, and the branches and leaves should be pruned to ensure that the land is moisturized, etc., so that the cabbage root swelling can be prevented.

First of all, when planting, you must choose the land with relatively fertile and wide soil, and in the process of fertilization, you must choose farmhouse fertilizer, and do not use fertilizer bought outside. And also to water more, to prevent the occurrence of pests and diseases, if there are small bugs, then be sure to spray insecticides.

The first thing is to improve the soil, we must improve the salinization of the soil, and the corresponding disease-resistant varieties are used, and then you can also choose the way of rotation and stubble, and you can also choose to dry the soil.

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.

First of all, we need to choose varieties with strong disease resistance when selecting seeds, and then disinfect and sterilize the seeds. Continuous cropping can not be implemented, and the crops before the soil are cruciferous should be avoided as much as possible, and some vegetables and fruits can be planted in rotation. If you want to disinfect the planting plot, you can use a suspension, such as a suspension, to mix it into the soil before sowing.

Take precautions, disinfect them regularly, and strengthen the management of the garden.

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 the damage of Chinese cabbage, its host plant also includes small Chinese cabbage, Chinese cabbage is a common cooked vegetable on the table, its planting area is wide, there are large areas of planting in the south and north, cabbage is easy to get root swelling disease, it is also a tumor disease that we often say, how to prevent it? With many years of experience in growing vegetables, let's talk about the prevention of cabbage tumor disease.

Chinese cabbage root swelling disease is a kind of serious damage to cabbage * pests and diseases, from the seedling to the adult plant stage, Chinese cabbage root swelling disease will cause great harm to the production and quality of Chinese cabbage, so how to prevent and control Chinese cabbage root swelling disease? I am glad to be able to answer for you, apply biological fertilizer to select the diseased plots that have not taken any prevention and control measures, and apply biological bacterial fertilizers Heshenyuan, Kunqier, Manyuanchun, and Gymboree respectively to supplement beneficial bacteria and improve plant disease resistance.

Cabbage root swelling disease is a disease caused by fungal infection, at the onset of the disease, the main root or lateral roots of cabbage can be seen to be swollen, and some root nodules have grown, which seriously affects the absorption of fertilizer and water by cabbage. When the disease is severe, the cabbage wilts and even dies in patches. Do you mean dry heartburn?

This requires you to prevent and control from many aspects: heavy stubble, partial application of large element fertilizers, and drought may cause calcium deficiency in cabbage.

Prevention and control methods: choose disease-resistant varieties. Collect seeds on disease-free plots or disease-free plants to reduce the possibility of germs in seeds.

Seed sterilization. Wet mix with seed weight of ethylene phosphorus aluminum, and then dry mix with 50% Fumei double dry mix of the same weight; Chinese cabbage belongs to the cold and 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. Cabbage is a moisture-loving vegetable, and cabbage root rot mainly harms the roots, and the main characteristics are the formation of tumors after the roots are damaged, and the tumors are generally formed on the taproots, and there are fewer tumors on the lateral roots.

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.

Chinese cabbage is a vegetable that many people like, and many people will stir-fry a plate of Chinese cabbage in normal times. When planting, Chinese cabbage will be harmed by Chinese cabbage root swelling disease, which is extremely harmful and widely distributed, which will cause a large loss of Chinese cabbage yield every year, and sometimes even lead to a single Chinese cabbage not harvested, which has a very serious impact on the Chinese cabbage industry. Chinese cabbage root swelling generally occurs in May and November, and this period is the peak of the disease.

Symptoms of Danger: Chinese cabbage root swelling disease, as the name suggests, will harm the roots of Chinese cabbage. At the beginning of the disease, the roots of Chinese cabbage will have tumors, and the surface of the tumor is smooth and spherical in shape. In the later stage of the disease, the roots of the Chinese cabbage will become rough and even cracked, and it is easy to be infected by other bacteria, and some will also emit a foul smell.

Chinese cabbage root swelling will make the roots of Chinese cabbage swollen, and the tumors of the taproot are large, but the number is small, while the tumors of the lateral roots are smaller and the number is larger. Due to the impact on the roots, it will also harm the overall growth and development of Chinese cabbage, and the phenomenon of growth retardation will occur. <>

The incidence of Chinese cabbage rhizobia disease, most of them appear in May and June, if the summer and autumn of the year are rainy, the Chinese cabbage root swelling disease will be aggravated, and in the rainy season, the root swelling disease will also be aggravated. Not only that, but low-lying fields, acidic soils, or poorly drained fields are also prone to disease. And Chinese cabbage and germs will be scattered in the land in the form of buns, its resistance to the environment is very tenacious, and can even survive in the soil for seven or eight years, when the environmental conditions are suitable, the spores will be released from dormancy, and the Chinese cabbage will be infected.

Control methodsThe most common control method in agriculture is crop rotation, which can control pests and diseases, and is environmentally friendly and pollution-free, and simple to operate. You can also choose disease-resistant varieties when planting Chinese cabbage, which is more effective in preventing Chinese cabbage root swelling, and you can soak Chinese cabbage seeds in warm water at about 50 degrees for 20 minutes before planting. Because Chinese cabbage root swelling is easy to occur under the condition of low soil pH, it is necessary to adjust the pH of the soil in time.

Generally, it is very easy to get sick if the humidity is relatively high, so when planting Chinese cabbage, you must water less, and choose some land with more suitable pH, you can put some lime powder, and the temperature is generally about 20 degrees.

Chinese cabbage root swelling disease generally occurs during the growth period, and it must be timely at this time, otherwise there is no way to repair it even if you want to do so in the middle and late stages.

This is usually the case every summer, so be sure to pay extra attention in the summer to reduce it.

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.