Why are cabbage, turnips, and carrots soft rot and rotten roots? What is the best way to prevent it?

Cabbage, radish, carrot soft rot and rotten roots, the best way to control it: repeated planting refers to the repeated planting of the same crop on the same land. Repeated planting is important to increase the number of pathogens in the soil.

The longer the same crop is planted in the same area, the more serious the pests and diseases will be. In addition, brown spot disease is not only harmful to Chinese cabbage, but even all cruciferous crops, so repeated planting is one of the important factors causing brown spot disease.

Brown spot is usually caused by some pathogenic bacteria. Most of the pathogenic bacteria are in the soil, but it may also be that the cabbage seeds themselves have pathogenic bacteria, agricultural machinery and tools have pathogenic bacteria on the belt, or chemical fertilizers are used to have pathogenic bacteria on the belt, and finally infect the Chinese cabbage growing on the area, resulting in the production of Chinese cabbage brown spot disease. The repeated planting of non-cruciferous vegetables for 3-4 years can effectively reduce the total number of pathogenic bacteria in the field and reduce the occurrence of pests and diseases.

Finally, improve the planting management methods, select sunny days for planting, do a good job in the field drainage pipes, eliminate diseased plants anytime and anywhere, avoid the reproduction of bacteria, eliminate the residues of diseased plants after the crops are obtained in the field, and then carry out unified and centralized incineration treatment to kill the residual pathogenic bacteria to avoid risks.

The area that has produced pests and diseases needs to be disinfected and sterilized in the soil layer, and the method of spraying and spraying pesticides and fungicides can be used to disinfect the Chinese cabbage roots, and it may be the reason for too much fertilizer. Chinese cabbage in the growth of nutrients requirements are relatively large, in the maintenance of them to provide too much fertilizer, will cause Chinese cabbage to occur pesticide damage, the root rot, then can irrigate a lot of water to the soil, dilute the fertilizer in the soil, to assist plant remediation growth and development. Cabbage root rot may be a problem with the soil layer, at this moment, you can use Mandzuki Chiyanwo microbial fertilizer with root powder to help nourish the soil layer and promote root growth.

In addition, the use of too much base fertilizer, or the bite or damage of the plant from the disease, may lead to the invasion of pathogenic bacteria and soft rot. Soft rot mainly damages the underground stems, the leaves and stems appear water-like, the surface leaves are water-deficient and wilted, and the underground stems rot when the condition deteriorates. It is filled with a yellowish sticky substance, which releases a special foul odor and causes the whole plant to rot.

The soft rot of cabbage, radish and carrot is a bacterial disease caused by the infection of carrot soft rot pectin bacillus carrot subsp. carrot, which generally occurs in the middle and late stages of cabbage, radish and carrot growth, but the pathogen can be infected and cause cabbage, radish and carrot disease under the temperature conditions of 2-38. Underground pests and leaf-eating pests are heavy, long drought in the middle and late stages of growth with heavy rainfall or low temperature and rain that lasts for a long time, early sowing, excessive squatting, low-lying and heavy soil clay plots, cabbage, radish and carrot are more prone to soft rot. The best way to prevent and avoid soft rot of cabbage, radish and carrot cannot but be said to be fortified before sowing and taking measures to soak or dress seeds.

It may be caused by pests and diseases or excessive precipitation, which needs to be sprayed with pesticides in advance, and excessive precipitation can be controlled by drainage through ditches.

It may be because of watering too much, causing its anaerobic respiration to produce alcohol and lead to root rot, so it is enough to water less.

Radish black rot, commonly known as black heart and rotten heart, is a disease caused by bacteria. The leaves are infected, V-shaped spots appear on the leaf margins, the leaf veins turn black, the leaf margins turn yellow, and then extend to the entire leaf. The infected duct in the root turns black, and the internal tissue is dry rot, and no obvious symptoms can be seen on the outside, but the bone marrow is mostly black dry rot, and then a cavity is formed.

Soft rot tends to occur in the field and eventually rots. May be soft rot: the roots tend to start from the tip of the root and have oily brown spots.

After the development period, the roots become soft and rotten, and then spread upwards to make the heart leaves black and brown and soft, and rot into slimy mud.

The use of clothianidin copper, agricultural streptomycin, mesomycin, leaf conazole, chlorbromoisocyanuric acid, copper rosin acid and other drugs for prevention and control of this is a rot disease, to water reasonably, do not water the land, strengthen the cultivation, maintain soil permeability. No matter how many times you plough, the ridge height should remain the same. Only through cultivating can the radish root system be provided with enough oxygen to promote its healthy growth.

Chemical control. Before the onset of the disease, the roots can be watered with root stones combined with high-targeted drugs, and each plant can be watered with 3-2 times of medicinal solution, a total of 2-3 times. Find aphids and spray them as soon as possible.

Onset conditions: suitable temperature 25-30, high temperature and rain, continuous cropping or early sowing, low terrain, excessive irrigation, poor drainage, little or unripe fertilizer, frequent human injuries and insect injuries. Prevention and control methods:

Focus on prevention and adopt a comprehensive prevention and control approach. 1) Crop rotation and stubble, using formula fertilization technology. 2) Sow at the right time, not too early.

3) Choose disease-resistant varieties such as Fengguang generation radish, Qiaohong No. 1, Shijiazhuang white radish, etc. 4) Seed treatment. Soak in 50 warm water for 30 minutes, or sterilize at 60 dry heat for 6 hours, or mix seeds with 50% of the seed weight of Fumei double wettable powder.

5) Soil treatment. Before sowing, 750 grams of 40% pentachloronitrobenzene powder were applied to each acre. The method is to take 750 grams of fungicide, add 10 liters of water, mix it with 100 kilograms of fine soil, and sprinkle it into the hole.

6) Strengthen field management, frequent irrigation with small water at the seedling stage, reduce soil temperature, and set seedlings at appropriate intervals. 7) Spray 72% agricultural streptomycin sulfate soluble powder 3000-4000 times, 47% gallonon wettable powder 700 times or 14% copper complex aqueous solution 300 times at the beginning of the disease, spray once every 7-10 days, and continuously control 3-4 times.

This is caused by the fungus infection of white radish, which can be prevented with carbendazim, and generally sprayed 2 or 3 times to have obvious effects.

At this time, irrigation must be strengthened, prevention must be carried out from the roots, and timely sterilization, and some chemicals must be used for irrigation, and drainage must be done well, and there is also to choose the right soil, timely ventilation.

We must implement crop rotation and stubble, we must use the formula fertilization technology when fertilizing, choose some disease-resistant varieties, soak the seeds in warm water at 50 degrees before planting, and then sterilize for 6 hours, and we must disinfect the soil, strengthen the management of the field, and we must water more to reduce the temperature of the soil.

When it comes to white radish, everyone should be familiar with it, almost every day, and even eat it every day, white radish is very nutritious and rich in vitamins. But how much is known about some of its diseases?

The soft rot of white radish is caused by Owen bacteria, which is a bacterial disease。Soft rot is a devastating disease, a little careless, ineffective prevention and control, inappropriate prevention and control measures, will cause great economic losses, and even no harvest. There are three types of soft rot of white radish, basal rot type, heart rot type and leaf burn type.

The pathogenic bacteria of the disease are usually found in the soil and are transmitted by rainwater and watering, and the pathogens are infected by contact with the wound of white radish.

When the disease occurs, the plant undergoes some changes. At the beginning of the disease, there will be some brown irregular spots on the plant, after which the fleshy roots of the white radish will rot, spilling mucus outward, giving off a foul smell, and finally, the entire fleshy roots will rot.

Usually the prevention of soft rot is the main thing, and the chemical method is used to prevent and control the white radish that is diseased。You can use 1000 times of agricultural streptomycin solution, or 1000 1200 times solution of streptomycin sulfate, or 60% chlorothalonil powder 600 times solution, or 50% of dysceyne aqueous 100 times solution, or 40% carbendazim 600 times solution, foliar spray control, once every 5 days, 2 3 times in a row. When using pesticides, focus on the soft rot site and the surface and petiole around the diseased vegetables, so that the medicine can flow into the cabbage heart, the effect will be more obvious and better.

Prevention at the beginning of planting starts with the following points:

1.When planting, try to choose a higher location and repair the drainage and irrigation system in advance.

2.Timely control of pests, not only on the surface, but also underground.

3.When weeding, do not allow cracks in the roots in the ground to avoid infection.

4.When diseased plants are found, dispose of them in time to avoid infecting other plants that are not diseased.

5.Drug prevention and treatment, spraying relevant drugs in the early stages of the disease.

6.When harvesting, it is also necessary to avoid abrasions, and the humidity should not be too high when storing.

In short, white radish soft rot is a malignant bacterial disease, a devastating disease, which must be taken seriously to avoid causing major economic losses.

Use pesticides, but don't use too much, otherwise, it will not be good for the growth of radish.

Once every few years, it is necessary to weed and fertilize the field in time, and you can also use drugs to prevent and control, and if you use drugs, you should use them in advance.

When planting white radish, try to use some preservatives or sterilizing agents, because this situation is caused by too many bacteria.

1. If it is because of the rotten roots caused by the roots, the specific methods are:

1. Plot selection.

Choose a plot of land with high terrain and good drainage for sowing or planting to avoid standing water and roots.

2. 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.

3. 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 the moisture status of the soil and soil, which is conducive to the extension of the root system, and in the later stage of Chinese cabbage growth, cultivating is also conducive to increasing the ground temperature.

4. Control soil moisture.

Drain water in time after rain to prevent rain and waterlogging. 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.

Second, if it is because of soft rot caused by root rot, the specific methods are:

Avoid planting on low-lying, sticky plots, and avoid Solanaceae, melons and fruits, and cruciferous vegetables before planting plots. You can choose to add 100 kg of water or 70% Dixon 600 times per sachet to irrigate the roots, or you can use 20% Rocronella 600 times or 47% Garinon 800 times once every 7 days, spraying 2-3 times.

Radish root rot is also root rot, which is very common, unreasonable water and fertilizer, soil rotation, water accumulation in the field, etc., will lead to root rot of radish. Therefore, the prevention and control of radish rotten roots should be carried out step by step, and detailed control measures should be carried out at all stages of radish planting.

1. Farming system.

Continuous cropping systems not only cause imbalances in soil fertility and nutrients, but also cause serious diseases and insect pests. Therefore, it is important to establish a rotation system of more than three years, and in the severely diseased areas, it is necessary to carry out fallow to alleviate the soil disease, and pay attention to soil fertilization measures after fallow.

2. Soil treatment.

There is a large amount of fungal fertilizer in the soil, and some fungi live by sucking nutrients from vegetation roots, stems, branches and leaves. Therefore, before planting radish, the soil should be sterilized, which can be treated with lime mixing, or by biological control methods, root fungus fertilizer mixing.

3. Fertilization management.

The basal fertilizer is generally carried out before the radish is planted, but the organic fertilizer applied to the basal fertilizer should be completely decomposed before it can be used. There are a large number of pathogens in the unrotted organic fertilizer, which will cause serious diseases when applied to the soil, and the organic fertilizer will produce a lot of heat and harmful gases in the decomposition process, which will burn the seedlings. Organic fertilizer can be applied to the soil for more than 40 days before planting turnips.

In addition, excessive nitrogen fertilizer can burn the roots of seedlings due to heat dissipation, so nitrogen fertilizer should be in moderation.

4. Seedling management.

Seedlings have weak resistance. Therefore, radish seedlings should be topdressed as soon as possible to improve their disease resistance, and root boy fungus fertilizer should be applied many times at the seedling stage to protect the roots of the seedlings from the invasion of pathogens. In addition, it is necessary to timely seedlings, pull out weak seedlings and diseased seedlings, and deal with diseased plant holes in a timely manner, and replenish seedlings.

5. Moisture management.

The disease spreads through rain and watering. Rain is uncontrollable, so we need to pay extra attention to watering. Scientific watering methods are mainly sprinkler irrigation and drip irrigation, but the cost is often higher, therefore, when watering, adhere to the principle of frequent watering and less watering, which can also prevent the spread of diseases.

6. Cultivating and weeding.

When there is too much water in the field, it is necessary to open a ditch and drain it in time to prevent the breeding of germs. In addition, timely cultivation and weeding should reduce the competition of weeds for nutrients on the one hand, and on the other hand, it can improve soil activity, soil ventilation and promote the growth of seedlings.

<>1) Symptoms. The disease can be susceptible at the seedling stage, the center of the root turns black, and the seedling dies. After the radish is infected in the middle and late stages, the external symptoms are not visible, but the fleshy roots are black-hearted and dry.

2) The main conditions of the disease. High temperature and humidity are conducive to the onset of the disease. Poor field management or pest tearing and wounds, early sowing, heavy rainfall, low-lying terrain, uneven watering, and multi-year cropping can lead to the disease.

3) Prevention and control methods.

Take care to select seeds from disease-free plants. Seeds suspected of being diseased can be soaked in 200 times ammonium for 15 minutes to eliminate the germs.

Avoid co-cropping with cruciferous vegetables. Eliminate all kinds of pests that are easy to cause wounds in time. Irrigation should be even, avoid the soil suddenly dry and wet, especially do not flood irrigation.

In areas with severe disease, soil treatment can be carried out, with 50% Fumeijia oak two kilograms, add 10-13 kg of fine soil, sprinkle at the bottom of the ridge before sowing the radish, and then support the ridge.

Do not use radish manure with black rot. The use of small high ridge cultivation is conducive to drying out and reducing the incidence of disease.

Field spraying is the same as soft rot. Spray 500 times of 401 antibacterial agent or 50% Fumeishuang 500 times before the radish is put into the cellar or when the radish is poured into the cellar to prevent the spread of the disease.