Cabbage root rot is very common, what are the good prevention and control skills for cabbage root ro

Cabbage belongs to the 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. Chinese cabbage is a moisture-loving vegetable, and moist soil conditions are required throughout the growing season, especially Chinese cabbage can not lack water in the rosette stage and the core stage. Cabbage soft rot, the virus is generally the seed and soil infected with the virus, to eliminate this disease, to prevent the main, it is best to buy when selecting seeds, the seed company's coated seeds, the land should not be cropped, it is best to separate the stubble, or it is better to plant cabbage every other year.

For cabbage root rot, you can choose a plot with high terrain and good drainage or ridge planting to prevent water accumulation in the field. In the early stage, it should be shaded appropriately when it is high temperature, and attention should be paid to cultivating in the later stage to maintain appropriate soil moisture. If soft rot is found, you can use 3000-4000 times of 72% agricultural streptomycin soluble powder.

Avoid continuous cropping, soft rot is also a soil-borne disease, and the bacteria can overwinter in the soil and continue to damage the cabbage the following year. If there are no conditions for crop rotation, fungicidal pesticides should also be sprayed before sowing. Don't just use urea, which is the solid fertilizer with the most nitrogen content.

Although cabbage has higher requirements for soil moisture, it can not withstand the frequent rainy weather, which is a crop that is more afraid of waterlogging, and then leads to the high humidity of the soil, and even the water in the garden, which causes the soil of cabbage roots to be impermeable, so as to rot roots and the occurrence of heart phenomenon.

Do not over-water. At the same time, it is also necessary to pay close attention to the weather forecast to prevent excessive humidity and high temperature, which can cause the disease to breed. (If you don't have a good grasp of the amount of irrigation, you can water the odd ditch first, and then water the even ditch after a few days.)

If the onset is mild, drugs such as prix, dimethofen or crew can be used at the beginning of the disease. These agents can be used by irrigating the roots or spraying the base of the stem. Timely spraying for prevention and control, you can spray 500 times of 50% carbendazim or thiophanate-methyl wettable powder, with an interval of 5 to 7 days, and spray two to three times in a row, which can have a good preventive effect.

In the event of an illness, it can also be used with Frost Spirit. Manganese-zinc + dixon irrigation roots.

1. Choose a good environment for planting, a flat place.

2. Cruciferous vegetables cannot be used for continuous cropping.

3. Prevent water accumulation in the field after flooding and irrigation and after rain.

4. In the early stage of the disease, timely use of pesticides to prevent and control the disease, with 72% Kelu 1000 times solution, or Pulik 800 times solution, or 15% Chlormycolin 400 times solution, irrigate the roots or spray the base of the plant stem and the surrounding soil.

The occurrence of root rot is also due to the lack of timely drainage treatment, which is also caused by improper management, so such root rot will occur after a long period of stagnant water, so the most important thing to do at this time is to carry out a large amount of fertilization in time.

1. Choose high or flat ground for planting. 2. Avoid continuous cropping of cruciferous vegetables. 3. The affected area was changed to seedling transplanting.

4. Strictly prevent water accumulation in the field after flooding and irrigation. 5. In the early stage of the disease, timely use of pesticides for prevention and control, you can use 72% gram dew 1000 times solution, or Pulik 800 times solution, or 15% oxazine 400 times solution, irrigate the roots or spray the base of the plant stem and the surrounding soil.

Some pesticides should be used to prevent pests and diseases, and they should also be watered frequently, pay attention to safety, and should reduce the time of sunlight, etc., these are all tips that can prevent cabbage root rot.

In normal times, it should be watered and fertilized in time, and it should also be well managed, and it is also necessary to maintain ventilation, and it is also necessary to loosen the soil in time, and it is also necessary to keep the light sufficient and the soil moist.

If the root and stem rot of green vegetables and the smell is rotten, it is soft rot of green vegetables. Its pesticide control methods: the prevention and control of cabbage soft rot should be from the rosette stage to check the field, spray once every 7 10 days at the beginning of the disease, spray once every 5 7 days during the peak of the disease, and spray 2 3 times in a row.

The first diseased plant is found to be watered with the diseased plant and its surrounding healthy plants in time with the medicinal solution, and the medicinal solution irrigated by each plant depends on the size of the plant, the dryness and wetness of the soil and the concentration of the medicinal solution, and it is generally appropriate to kilograms. Commonly used agents are 800 1000 times of Pulik water-soluble liquid, 800 1000 times of 47% Garinon wettable powder, 1000 1200 times of 401 or 402 antibacterial agent, 800 1000 times of 50% desesylamine aqueous solution, 500 1000 times of dixone original powder, 2% agricultural streptomycin or neophytomycin, 150 times of "agricultural resistance 120" solution. Hydrated lime was sprinkled around the diseased plant in the center of the initial vegetable field, and the dosage per mu was 60 kg, and the control effect was also good.

Chinese cabbage root rot, may be due to excessive watering, at this time it is necessary to loosen the soil for Chinese cabbage, drain the excess water, or it may be due to excessive fertilization, you need to add new soil for Chinese cabbage, dilute the amount of fertilizer, or it may be because the temperature is too high, you need to ventilate and dissipate heat for Chinese cabbage to maintain its normal growth.

1. Overwatering

The root rot of Chinese cabbage may be due to overwatering. The roots of Chinese cabbage are fragile, if there is too much water in the soil, it will cause it to rot, at this time you need to use a hoe to loosen the soil and drain the stagnant water in it, and in the later stage of maintenance, you need to replenish water for the Chinese cabbage after the soil is dry.

2. Excessive fertilization

The root rot of Chinese cabbage may also be due to excessive fertilization. In the process of Chinese cabbage growth, the phenomenon of fertilizer damage will lead to root burns and rot, at this time, it is necessary to add new soil to the Chinese cabbage, and water water to the soil to dilute the amount of fertilizer.

3. The temperature is too high

The root rot of Chinese cabbage may also be due to the high temperature. Chinese cabbage is a cool-loving plant, suitable for growing in a cooler environment, if the ambient temperature is too high, there will be root rot, at this time it is necessary to ventilate the Chinese cabbage and heat dissipate heat, keep the temperature of the environment appropriate.

4. Breeding methods

When cultivating Chinese cabbage, it can provide it with a balanced mixture of nitrogen, phosphorus and potassium fertilizer, and after fertilization, it is necessary to water the plants in time to help the Chinese cabbage absorb nutrients and water, and at the same time, it can also provide full sunshine, so that the plants can photosynthesize normally and grow more luxuriantly.

The causes and control methods of Chinese cabbage root rot are as follows: Chinese cabbage bacterial soft rot, Chinese cabbage root shrinkage disease, Chinese cabbage root swelling disease, etc.

1. Bacterial soft rot of cabbage

Soft rot is also called rotten pimple. Most of them begin to develop in the heart stage, and the outer leaves are mostly atrophied under the exposure of sunlight at the beginning of the disease, but they still recover sooner or later, and with the development of the disease, these diseased leaves no longer recover, exposing the leaf bulbs. The lesions are water-soaked, and the tissues of the diseased parts are browned, rotten, sticky and slippery, and have a foul smell.

Prevention and control methods:Avoid mechanical damage to cabbage during agricultural operations, and timely prevent and control insect pests such as jumping beetles; In the early stage of cabbage, agricultural streptomycin, spring leimycin, etc. are selected for spraying, focusing on the base of cabbage, and the roots can also be irrigated with the above agents.

2. Cabbage root shrinkage disease

The seedlings are diseased, and the base of the stem is water-soaked, shrunken, lodging, and cataplexed. Adult plants become diseased, with the outer leaves wilting during the day, recovering at night, and then the outer leaves begin to die. Diseased plants have poor ball formation, or even no ball formation.

Peeling off the roots of the plant, it can be seen that the roots turn brown and rot, the middle of the roots shrinks, and the lower part disappears, leaving only the upper half. The germ spreads with rain, irrigation water, and farm tools, and spreads quickly.

Prevention and control methods:At the beginning of the disease, the roots should be irrigated with oxachlor wettable powder, methamethyl wettable powder, mancozeb wettable powder or vicethoxa-nail cream water agent, or sprayed at the base of the plant stem and the surrounding soil.

3. Root swelling of Chinese cabbage

The root swelling disease of Chinese cabbage is widely distributed in all provinces of the country, among which the disease is serious in the south, and a large number of deaths are dying when the disease is serious at the seedling stage. The symptoms of damage at the adult stage are: the basal leaves gradually turn yellow, wilt, lose water and dry up, the main, side, and fibrous roots form tumors of different sizes, which begin to be smooth, and then become rough and cracked, the plant is short, grows slowly, and wilts and dies in severe cases.

Prevention and control methods:

The plots with severe disease were rotated with non-cruciferous plants for 6 years, cultivated in high ridges, drained in time after rain, lime was applied to acidic soil to adjust pH, phosphorus fertilizer and potassium fertilizer were applied to improve soil fertility, and diseased plants were removed in time to be buried or burned. At the time of sowing, 1-2kg (mu) of 20 pentachloronitrobenzene powder was used to treat the soil in the planting hole. At the initial stage of the disease, 140 to 160 times of 40 fluridamide can be used to irrigate the holes.

For the rotten roots caused by Chinese cabbage roots, it should be drained in time after rain to prevent rain and waterlogging, and watering should be carried out in time when the soil is short of water, and the amount of water is appropriate. Under the conditions of high temperature and hot or low temperature and cold, if there is continuous rainy weather or flood irrigation, Chinese cabbage will be in a state of stagnant water for a long time, which will lead to tissue necrosis of cabbage roots due to lack of oxygen, and eventually root soaking. Avoid mechanical damage to cabbage during agricultural operations, and timely prevent and control insect pests such as jumping beetles; In the early stage of cabbage, agricultural streptomycin, spring leimycin, etc. are selected for spraying, focusing on the base of cabbage, and the roots can also be irrigated with the above agents.

There are many reasons for the rotten roots of Chinese cabbage, such as root rot or excessive watering that leads to root rot, and the prevention and control method is actually to plow the soil and expose it to the sun before planting, and then to prevent this waterlogging.

The soil is not fertile, the pH is not good, the air permeability is not good, the drainage is not good, the seed quality is not good, and too much watering will cause the Chinese cabbage to rot the roots; The soil must be very fertile, the pH should be appropriate, the air permeability should be good, the drainage should be good, the quality of the seeds should be good, do not water too much, the water must be appropriate, so that it is OK.

Chinese cabbage is a semi-cold vegetable, prefer a cold climate, not cold tolerant and not heat-resistant, when it is planted, in a particularly high or low temperature environment and too much water accumulation in the soil, the root system of Chinese cabbage will lack oxygen and lead to root rot; It is necessary to strengthen field management, remove weeds and diseased plants in time, do not plant too densely, and increase the air permeability and drainage of the soil to prevent water from becoming waterlogged.

1. Rooting: In the case of hot or cold weather, continuous rainy days (or flooding when watering) will make the cabbage stay in a state of stagnant water for a long time, resulting in necrosis of the roots due to lack of oxygen, and then the occurrence of roots, after the roots will show root rot, leaf yellowing and other phenomena, and the plant will die in severe cases. 2. Soft rot:

Low-lying plots with severe water accumulation are prone to the disease, and when the disease is severe, the heart tissue of the rhizome and the base of the petiole will completely decay.

1. What's going on with the rotten roots of cabbage

1. Roots. (1) When the weather is hot or cold, if there are continuous rainy days or watering in the form of flood irrigation, the cabbage will be in a state of stagnant water for a long time, resulting in necrosis of the root tissue due to lack of oxygen, and then the root will be rooted.

2) In the early stage of cabbage growth, it is easy to have high-temperature rooting due to the high temperature outside; In the later stage of Chinese cabbage growth, low-temperature rooting is prone to occur with the drop of external temperature.

3) After rooting, the leaves will turn yellow, the shoots wilt, and the roots rot, and the plants will die in severe cases.

2. Soft rot:

1) Cabbage soft rot mostly occurs at the petiole on the rhizome and base, which is water-stained after the onset of the disease, and the outer leaves are dehydrated and wilted, and can return to normal in the morning and evening in the early stage of the disease, and will not recover after a period of time, and the outer leaves will lodging to expose the leaf balls.

2) When the disease is severe, the heart tissue and the base of the petiole at the rhizome will be completely rotten, full of yellow sticky, emitting a foul odor, and finally causing the whole plant to rot.

3) the disease is more likely to occur in warmer years in autumn; Low-lying plots with severe water accumulation are prone to disease; When the cabbage is wrapped in high temperature and rainy humid weather, the disease occurs more seriously. Cabbage is also susceptible to disease when it is damaged by insects and machinery.

Second, the prevention and control method of cabbage root rot

1. Roots. (1) Choose a plot with high terrain and good drainage as the planting site to avoid stagnant water and roots.

2) If the cabbage encounters high temperature weather in the early stage of growth, it can be shaded with a shade net to avoid the occurrence of high-temperature roots.

3) Cultivating and loosening soil to increase the air permeability of the soil and improve the activity of aerobic microorganisms. Cultivating cabbage in the late growth stage is also beneficial to increase ground temperature.

4) Timely drainage after rain to prevent rain and waterlogging; When there is a shortage of water in the field, flood irrigation should not be carried out to avoid stagnant water.

2. Soft rot:

1) Avoid planting cabbage in low-lying and sticky plots, avoid continuous cropping with melons, Solanaceae and cruciferous vegetables, and grass plants should be used for the first crop of the planting site.

2) Level the land, clear the ditch and fix the furrow, and plant the high furrow. Watering in a furrow to avoid flooding.

3) When working in the field, it is necessary to avoid damage to cabbage.

4) At the initial stage of the disease, spray 3000-4000 times of 72% agricultural streptomycin sulfate soluble powder, or 700-750 times of 47% Garinon wettable powder, or 4000 times of neophytomycin, or 350 times of 14% copper ammonia aqueous solution, spray once every 7-10 days, and spray 2-3 times continuously.