Chinese cabbage soft rot is the main disease of Chinese cabbage planting, how to prevent and control

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.

Pathogens overwinter on vectors such as diseased residues, soil, unrotted farm manure and out-of-season diseased strains, which become an important source of primary infection and can be tossed and injured by different hosts. Pathogens can be transmitted through rainwater, irrigation water, fertilizers, soil, insects and other ways, and are mostly infected through wounds or natural cracks in plants.

This is because there is no timely watering and fertilization, or because there is no sufficient sunlight, or because of improper watering, or because there is no timely supplementary fertilizer, or there is no timely removal of insect pests.

There was too much water in the field, it was not drained in time, and there was no pest control.

The main ** is divided into the following points, first of all, Chinese cabbage has different growth periods, so its healing ability is also different. And climate, wounds and other factors can also cause soft rot. Finally, there are pests and diseases, planting conditions, and so on.

In fact, soft rot can also be called rot disease and so on, its incidence is very high, and the spread is very widespread. Once the disease is detected, it must be treated immediately in order to improve the quality of the cabbage, increase the yield and avoid more serious economic losses. <>

The growth period is differentBecause the germ can only invade from the wound, if the cabbage is in different growth periods, it will also have different healing ability. Corkification occurs three hours after the appearance of the wound at the seedling stage and twelve hours after the injury at the rosette stage. Because the seedling stage is not very sensitive to temperature, the rate of cork is not fast.

However, the rosette stage is very sensitive to temperature and the wound is treated very quickly, so it will appear to be corked after about six hours. Normally, soft rot occurs mainly at the rosette stage, with a very low incidence at the seedling stage. Therefore, only by grasping the incidence of the disease in different periods and the best ability can targeted prevention and control be carried out.

climate, woundsClimate is also one of the main causes of the disease, as rain can have a direct effect on soft rot. After the heart-wrapping period, there is more rainfall, so the onset is more severe. Because rain can infect the base of the leaves, it provides very good conditions for the spread of germs and delays wound healing.

Therefore, it is necessary to effectively treat the wound and take measures to prevent insects. <>

This disease can be caused by planting and selection of seeds if the terrain is relatively low, the drainage capacity is poor, and the irrigation work is not in place. At the same time, it is also necessary to pay attention to the soil, if the soil is more serious or the water and oxygen content in it is relatively low, it will also provide good conditions for pathogens. At the same time, it is necessary to select excellent varieties and improve the disease resistance of planted varieties.

In general, we will choose a straight variety with vegetable heart, but if you want to use green vegetables during the storage period. Although soft rot has a great impact on Chinese cabbage, as long as the cause and law of the disease are mastered, targeted and timely prevention and control can be achieved, which can enhance the resistance of Chinese cabbage.

Because there are wounds on the surface, it increases the infection of some germs and the planting environment is harmful, so it can also lead to such germs.

It is caused by bacteria in the soil. And this bacterium will seriously affect the quality of the cabbage, which will affect the final gain.

Under 20 and high humidity, pathogenic bacteria mainly form colonies centered on the rhizosphere soil of host plants for long-term survival. When it rains, it is splashed with soil particles, and it invades from wounds on the lower leaves and petioles of cabbage and pest food marks. In windy weather, fungus-carrying dust can be blown into the vegetable patch, and after the rainfall, the upper part of some plants begins to become sick.

Pathogens are usually spread by surface water. Its development temperature is 32 33, in case of parasitic plants, that is, rapid reproduction. Even if the soil is disinfected, the density of germs can be restored immediately.

Diseased fields should not be cropped continuously, and can be rotated with beans, wheat and rice. Clean up the diseased residues in the field, intensively cultivate the land, expose the soil to the sun, and promote the decomposition of the diseased residues. Sow seeds in time, set seedlings at the right time, increase basal fertilizer, and top dressing in time.

Cultivated with high ridges, which is not easy to accumulate water, and the soil has sufficient oxygen, which is conducive to the formation of callus at the base of roots and petioles, and can reduce the infection of pathogens. The rainwater should be drained in time, and the diseased plants should be cleaned up in time and sprinkled with lime for disinfection. Disease-resistant varieties are generally susceptible to diseases in the white spot type, and the blue spot type has strong disease resistance, and the straight-barrel varieties with round and flat-headed varieties have strong disease resistance.

The occurrence of soft rot is affected by many external factors, and the pathogen is generally invaded by the wound of cabbage in the fields planted with continuous stubble and the fields with frequent underground pests. Plots with few buried pests are less likely to have a mild disease. In the cultivation of new cabbage, due to the use of organic fertilizer that is not fully decomposed, there are many pests and diseases, and the disease is serious, especially after heavy rain and irrigation water.

With the formation of the community of Chinese cabbage soft rot pathogens, it will be harmful to the planting of Chinese cabbage for a long time. The prevention and control of soft rot of green vegetables should be mainly controlled. The prevention and control of cabbage soft rot, the selection of disease-resistant varieties and cabbage-resistant varieties, and the use of seed coating agents are one of the most effective measures to directly reduce economic losses.

Chinese cabbage cannot be planted with continuous heavy cropping, and the incidence of soft rot is much higher than that of cabbage cultivated in rotation. For Chinese cabbage that has developed soft rot, it is necessary to clean it up in time and disinfect it with lime to prevent the spread of germs, and eliminate underground pests in time to reduce the damage to cabbage due to insects. Planted on the plot that can be watered by drought and drained by waterlogging, the watering of cabbage should be watered with small water and frequent watering.

The application of organic fertilizer should be fully decomposed. Unrotted organic fertilizer contains a large number of pathogenic bacteria, insect eggs, etc., and at the same time, in the process of slow fermentation of organic fertilizer, it produces a foul smell, which is an important signal to attract adult pests to lay eggs. Increasing organic fertilizer can improve the disease resistance of Chinese cabbage, which is conducive to the high quality and high yield of Chinese cabbage.

Choose disease-resistant varieties, sow in a timely manner, high temperature and high humidity are easy to induce soft rot, sowing can not be too early, as well as the prevention and control of vector pests, in the initial stage of cabbage soft rot or in the late stage of Chinese cabbage rosette to the early stage of bulbous with drugs.

Insecticides need to be used in a timely manner, fungicides should also be used in a timely manner, and we must pay attention to reasonable dense planting, we must pay attention to the appropriate amount of watering and watering time, and we must pay attention to the time of use when using pesticides.

Clean the garden before planting, and choose disease-resistant varieties for scientific planting. In the early stage of the disease, neophytomycin was used with occultamine acetate and chlorothalonil for spray control.