Chinese cabbage is infected by black rot when planting, how to effectively reduce the harm?

Chinese cabbage is susceptible to the harm of black rot in the planting process, this bacterial disease is very harmful to the planting of Chinese cabbage, which directly affects the quality and yield of Chinese cabbage, black rot is also called hemiplegia, which is a very serious disease that harms Chinese cabbage. So how can we effectively reduce the harm of this bacteria?

The first thing to do is to reduce the black rot bacteria in the soilBefore planting Chinese cabbage, we must clean up the weeds, diseased plants and dead leaves in the soil in time, and it is best to burn or bury these diseased residues to prevent pathogenic bacteria from overwintering in the soil.

The soil should be turned deeply, and the large pieces of soil inside should be broken up to loosen the soil, and then covered with mulch, and the weather should be exposed to the sun for a week, so that the soil is deprived of oxygen to kill bacteria and pests.

Carbendazim can also be diluted with water and poured into the soil for disinfection and sterilization, generally black rot can survive in the soil for a year, so it is best not to crop together with cruciferous vegetables, you can plant eggplant, cucumber and other vegetables, which can reduce the bacteria in the soil.

Second, choose seeds that are healthy and not contaminatedIn this way, the infection of black rot can be eliminated at all, and if it is uncertain whether it has black rot, the seeds can be sterilized. You can soak the seeds in cold water for 10 minutes, and then soak them in hot water above 50 degrees for about 30 minutes, black rot will die if it exceeds 50 degrees, so the water should not be too high, otherwise it is easy to scald the seeds to death.

Generally, Chinese cabbage is selected for seedling transplanting, and the distance between the cabbages should be ensured when the value is fixed, so as to ensure that the cabbage will not be too crowded during the adult period, which is not only conducive to the rapid growth of cabbage, but also conducive to spraying pesticides and insects. Reasonable watering and fertilization, it is best to choose a morning watering when the weather is clear.

Have enough nutrientsIf the fertilizer is insufficient, it will reduce the development and growth of cabbage, and the disease resistance will be reduced and cause pests and diseases, so fertilization should be carried out with the growth of cabbage, and the basal fertilizer in the soil must be sufficient.

IfIf you find that you have black rot, you must remove it in time, and disinfect the soil and the surrounding cabbage and use chemicals to prevent and control itIf black rot is not timely, it will break out in a large area.

By spraying a certain amount of pesticides to stop the loss in time, it can also be moved to the greenhouse for breeding.

I think that when Chinese cabbage encounters black rot infestation, it should be sprayed with pesticides in time, and farmers should often inspect Chinese cabbage during the growth period, which can effectively reduce the harm.

If you want to reduce the harm, then you should use pesticides, and you should also have a good environment for Chinese cabbage.

Chinese cabbage is the most common ingredient on the table of every household, and there are many ways to eat it. Chinese cabbage is planted in greenhouses or in the open air, if it is not properly managed, it will cause the occurrence of black rot, which is a bacterial pathogen, and its harm is very serious, and it also brings a lot of losses to vegetable farmers.

The pathogen of black rot is mainly overwintered on seeds, diseased residues or diseased plants, and the use of agricultural tools。When vegetable farmers plant, the germs start to multiply and spread under the conditions of high temperature and humidity through seeds, seedlings and farm tools. When the fungus infects seedlings, it invades from the stomata at the edge of the cotyledons, and from the leaf water holes or wounds when the adult plants invade, causing black rot.

On the other hand, continuous cropping, partial application of nitrogen fertilizer, soil drought, inhibition of calcium fertilizer absorption, improper management of water and fertilizer will induce the serious incidence of black rot.

Prevention and control measures:

First, seed disinfection, select seeds with strong disease resistance。With a special agent for seed disinfection, the planting is carefully disinfected before planting to kill the germs on the seeds.

Second, land preparation, choose loose soil, fertile soil, good drainage, and apply well-rotted organic fertilizer as base fertilizer。Apply sufficient basal fertilizer, an appropriate amount of nitrogen, phosphorus and potassium compound fertilizer, and fertilizer with relatively high phosphate fertilizer. Avoid excessive nitrogen fertilizer, inhibit the absorption of calcium, and cause cabbage to rot due to calcium deficiency.

Turning the land deeply, it is best to plant ridges, which is conducive to drainage and can reduce the occurrence of black rot.

Third, fertilizer and water management。The way of small water watering, keep the soil moist, fertilizer flush high potassium, high phosphorus, less nitrogen fertilizer to supplement nutrients to the cabbage, so that the cabbage grows robust, conducive to its curl and firm, try to create a suitable climate environment for it in the growth process. The root system of cabbage is not very developed, so avoid flood irrigation, so as not to hurt the roots and affect its growth, and avoid unnecessary losses caused by high humidity and pathogens infecting cabbage.

Fourth, prevent and control the occurrence of diseases. Spray fungal and bacterial agents, insecticides and trace element foliar fertilizers in advance to do a good job of prevention.

It should be to make some antiviral varieties, to disinfect the seeds, to cultivate on the soil without pathogens, to use some pesticides appropriately, and to pull out some diseased crops in time, so that it can be well controlled.

I think that we should clean up the Chinese cabbage that is already sick and spray the remaining Chinese cabbage with a bactericide to prevent it.

It should be controlled with pesticides that specialize in black rot**, or by fertilizing and controlling temperature.

Black rot is a very important disease for Chinese cabbage, and this virus is distributed throughout the country, and black rot mainly affects the leaves of Chinese cabbageMost are diseases caused by bacteria, which overwinter in the soil with seeds, plants or diseased remains. Sowing diseased seeds causes disease in seedlingsAnd once the cabbage is cleaned by black rot,Most leaves have yellow spots that extend from the outside to the inside, starting from the leaf margins, whileThe reticular veins within the macula are brown to purplish-brown lesionsIf you use a microscope to observe the microscopic examination of the macular disease tissue, you can see that a large amount of mist cloudy fluid gushes out of the incision, and this condition is called cabbage black rot. If black rot is more severe in Chinese cabbage, petioles may occur, and most of the leaves will die or fall down.

For farmers, planting crops is their only income**, so if the cabbage has a very serious black rot, then it will lead to a poor harvest this season, and the family's income throughout the year will definitely have a great impact, so how to prevent and control the black rot of cabbage is a very important thing for farmers. <>

First of allWhen farmers plant cabbage, they must choose disease-free plantsIn this way, we can fundamentally solve the problem of black rot first, secondly, when sowing, we must disinfect the seeds, you can soak them in 45% dysenammonium water 400 times solution for 20 minutes, or soak them in warm water at 50 degrees for 20 minutes, the main purpose is to sterilize the seeds, through this way, the seeds can reach a very suitable situation for sowing, but after the soaking is completed, the seeds must be washed and dried before sowing. <>

Secondly,After sowing, be sure to water properly and always keep an eye on changes in the fieldOnce diseased plants are found in the field, they should be taken out to a distant place and buried deeply, and lime should be sprinkled on the place where the diseased plants are disinfected. <>

In the process of growing bok choy, there will definitely be all kinds of insect disasters at this timeIt is necessary to choose the appropriate agent for prevention and controlWhen black rot occurs in cabbage, you can also spray some pesticide water to disinfect at the beginning of the disease, but if you see that the leaves have been eroded and the area is relatively large, you must take these diseased plants out.

Pathogenic bacteria overwinter on seeds or collected plants or with diseased residues left in the soil. Sowing infected seeds, the pathogen invades from the water hole or wound at the edge of the seedling cotyledon, and the pathogen spreads with the help of rainwater splashing after the onset of the disease, and continues to infect, and the disease spreads and expands. The disease spreads over long distances, mainly through the transport of seeds.

Usually, after invasion, the bacteria multiply in parenchyma cells and then enter the vascular bundles, spreading from the vascular bundles of leaves to the vascular bundles of stems, resulting in systemic infection.

It may be due to root rot, or it may be due to a lot of stagnant water, or it may be due to some viruses when the seedlings are young.

It is because there are germs in the seeds, or some problematic plants, which can also cause infections caused by germs, and the soil is too moist and the temperature is too high.

Chinese cabbage soft rot usually starts at the base of the leaf petiole near the ground and gradually progresses to the inner leaves. At the beginning of the disease, yellow-brown lesions appeared at the base of Chinese cabbage leaves, and the lesions gradually expanded. The lesions wrap around the petiole for a week, and the leaves wilt due to dehydration, and finally fall off.

Diseased leaves turn into tissue paper after being dehydrated in the sun and are either laid flat on the ground or close to the leaf balls. The lesions gradually develop into the inner leaves, causing the stem base to gradually turn black and rot into mud, or collapse and fester. The petiole or root tissue is grayish-brown and soft rot.

In severe cases, the entire plant is rotten, and the site emits an unpleasant odor. In order to prevent and control Chinese cabbage soft rot, these three chemical agents are sprayed three times alternately, and the occurrence period of Chinese cabbage soft rot is a bacterial disease caused by Owen's bacteria. Pathogens overwinter or summer on diseased remnants and are mainly transmitted by irrigation, fertilization, and parasites.

Most pathogens invade from natural cracks, insect injuries, mechanical injuries, and disease injuries. Chinese cabbage has strong wound healing ability and few diseases at the seedling stage. After entering the rosette stage, there are more wounds caused by insect infestation and field management, and the wound healing rate is slower, which creates conditions for the invasion of pathogens.

Therefore, from the rosette stage to the endocardial stage, the disease gradually worsens, and the leaf base wounds soaked in water and water in the field are difficult to heal. Therefore, when the endocardial stage of Chinese cabbage encounters heavy rainfall, soft rot often occurs severely. Sterilize the seeds.

The causative agent of soft rot can be spread along with the seeds of cabbage. Before sowing, growers can soak the seeds with some chemicals, such as 3% mesomycin 300-500 times solution for 1 hour.

Soil improvement and disinfection. Many of the fields with frequent soft rot of Chinese cabbage are continuous cropping plots, planted all year round, and the number of soft rot pathogens in the soil is relatively large, so the soft rot is high after planting; Measures to improve the soil, increase the use of organic fertilizer, with microbial agents such as Bacillus subtilis, increase the content of beneficial microorganisms and organic matter in the soil, then the resistance of plants to soft rot bacteria will naturally increase! The occurrence of soft rot of cabbage affects the yield.

There are three ways for old vegetable farmers to easily prevent diseases without using ridge planting, which is very useful. High soil moisture during the growing season of cabbage is one of the important reasons for the high incidence of soft rot, especially in areas with abundant rainfall.

Chinese cabbage needs a lot of water during the hearting stage and is watered frequently, which increases the incidence. Ridge planting can avoid the long-term high humidity environment of Chinese cabbage and reduce the incidence of soft rot! With these three methods, the incidence of soft rot has indeed decreased, but what if soft rot occurs growers?

I would like to share with you some chemical treatment plans for the soft rot of cabbage! Foliar spray treatment: 47% spring thunder, 1000-1500 times king copper, 1000 times 20% clothianidin copper, 1500 times 45% spring thunder, 1000 times 4% spring thunder, 1000 times mesophytes can be used for root spraying, with an interval of 5-7 days.

It works better. Root irrigation control. It is recommended to irrigate the roots with 500ml mu of 2% chunleimycin and 300-500 times of 50% chlorobromoisocyanuric acid.

The field is cleaned before planting Chinese cabbage, and then you can choose to plant disease-resistant varieties. In the early stage of the disease, it can be used to prevent and control, such as: neophytomycin followed by octamine acetate, or chlorothalonil spray prophylaxis.

You can plant some varieties with strong disease resistance, such as Chitose cabbage, Hiratsuka No. 1 and so on, and avoid sowing seeds in the summer high temperature period, because if you sow in the warm months, the probability of disease will be higher, and if you sow seeds in dry highlands, there will be less disease.

First of all, when planting, you must choose land with relatively fertile and wide soil. And when fertilizing, you must choose farmhouse fertilizer, do not use fertilizer bought outside. It is also necessary to water the plants frequently, but also to prevent the occurrence of pests and diseases, and if there are small bugs, then be sure to spray some insecticides.

Generally, the incidence of green varieties is milder than that of white gangs, and late-maturing varieties are more resistant to disease than early-maturing varieties. The sparse straight cabbage has erect leaves in the field and is well ventilated, and the disease is less severe than that of the spherical type during storage, but during storage, the soft rot of the cabbage is caused by bacteria of the genus Euclidean when the spherical varieties are stacked during the storage period. This bacterium can grow and develop normally at 4 36 and pH, and can also grow and develop in the absence of oxygen.

Soft rot bacteria can secrete enzymes that digest the middle layer of host cells, and it is best to choose the plot of non-cruciferous crops before planting Chinese cabbage, plough the land in advance, improve soil properties, improve fertility and ground temperature, promote the decomposition of disease residues, reduce pathogens and reduce pests.

Pay attention to environmental hygiene and water frequently. If you are planting a large number of them, you can build some nets and the like on them. In the winter, we use some straw, for example, and we cover it with that straw.

There are also some fireflies in it, cabbage bacterial soft rot is a relatively difficult to treat bacterial disease, it will occur in many places where cabbage is planted in China, and the disease is more serious, and it will cause huge losses of cabbage, resulting in serious rot of cabbage.

The soft rot of Chinese cabbage is the rotten lump of Chinese cabbage that vegetable farmers often say, and it generally occurs in the hearting period of Chinese cabbage. The symptoms are: Chinese cabbage is one of my favorite vegetables, and every year I grow a little at home for easy consumption.

However, different pests and diseases will occur during the planting process, among which bacterial soft rot of cabbage is more common, so how can we prevent and control soft rot of cabbage?

Cabbage soft rot is a long-term disease in production, which generally occurs sporadically, and will also cause large-scale outbreaks when the temperature and humidity are suitable, affecting the yield and quality. If you want to prevent and control soft rot, we must first understand the symptoms of soft rot in the field and its occurrence rules. Cabbage is one of everyone's favorite vegetables, and there are many diseases in the planting process, among which soft rot is an important disease in the world, which occurs in different regions of China.