How to prevent cabbage rotten roots? Cabbage rotten roots, what medicine to use

Cabbage rot is usually due to a lack of calcium, and the calcium in the old leaves cannot be transferred to the new leaves, so it looks normal on the outside, but rotten on the inside. If you want to prevent rot, you can choose varieties with strong disease resistance, and do not combine cropping with crops such as cabbage and tomatoes. Supplement a little superphosphate before planting to increase the calcium in the soil, and water regularly to accelerate the absorption of nutrients.

1. What's going on with a bad heart.

The rotten heart of cabbage is not invaded by germs, but lacks a nutrient, that is, calcium. Since calcium is only present in old leaves and cannot be transferred to new leaves, there will be a phenomenon of healthy on the outside and dry heartburn on the inside.

Second, prevention and control methods.

1. Choose a good variety: Although calcium deficiency is not a disease, if the cabbage is sick, it will also affect the absorption of calcium ions, resulting in its rotten heart. Usually choose straight or green gang and other varieties with strong disease resistance, and can also be properly sprayed in daily maintenance, so as to play a role in disease prevention.

2. Avoid continuous cropping: cabbage should generally be planted in a place with deep soil layer and fertile soil, and it should be noted that it cannot be continuously cropped with cabbage, tomato and other crops, because these plants require a lot of calcium, which will greatly reduce the calcium element in the soil, which will lead to plant rottenness.

3. Proper fertilization: Before planting cabbage, you can apply basal fertilizer to the soil, usually using farmhouse fertilizer or organic fertilizer, with a certain amount of superphosphate, to improve the calcium element in the soil. After planting, you can apply a little fertile leaf amino acid foliar fertilizer, which can also alleviate the calcium deficiency and help the plant recover.

4. Watering in time: If the substrate is seriously short of water, even if the calcium content is high, the plant will not be able to absorb nutrients. At this time, it needs to be replenished with water, the amount of watering should be large, and it should be even, and if it is combined with fertilization, it is also conducive to fertilizer absorption.

To prevent and control cabbage root rot, you can plant it in loose, fertile and well-drained soil to avoid root rot caused by soil moisture, you can also water cabbage every 7-10 days to keep the soil with sufficient moisture, and you can also apply diluted liquid fertilizer every 30 days for cabbage to make it grow robust and improve disease resistance.

How to prevent cabbage from rotting roots?

1. Suitable soil.

Cabbage needs to be planted in loose, fertile and well-drained soil, avoid planting it in low-lying, moist soil, which can easily lead to root rot of cabbage.

2. Provide moisture.

After planting cabbage, it needs to be watered every 7-10 days to keep the soil with sufficient water to ensure that the cabbage can grow normally.

3. Apply nutrients.

When cultivating cabbage, it is necessary to apply diluted liquid fertilizer every 30 days, do not use raw fertilizer or thick fertilizer, it is easy to burn the root system of cabbage, it is necessary to pay attention to the fertilization, you can apply trime water-soluble fertilizer, can not apply fertilizer to the seedlings or leaves of cabbage, easy to cause plant rot.

4. Spray the agent.

When the leaves of cabbage are found to be yellow or begin to wilt, you need to check the state of its roots, if the roots of cabbage are soft and there are signs of decay, you can spray streptomycin sulfate for its **, when sprayed 2-3 times in a row, the phenomenon of soft rot can be alleviated.

Chinese cabbage soft rot is one of the three major diseases of Chinese cabbage, soft rot is commonly known as "off the gang", "rot pimple", is a serious disease that harms the growth of Chinese cabbage, and its occurrence has a great relationship with temperature and humidity. In the case of 15-20 low temperature and rainy during the heart-filling period of Chinese cabbage, the disease is serious.

Symptoms of soft rot of Chinese cabbage: the base of the petiole is rotten, the diseased leaves are collapsed, and the base of the stem is rotten and extends to the cabbage, and the diseased part is soft rot and smelly. After the diseased plants are found, they should be removed in time, the diseased vegetables should be taken out of the field and buried deeply, and the diseased vegetables should be sprinkled with lime for disinfection to prevent the spread of the disease.

Drug prevention and control: 72% agricultural streptomycin sulfate 3000 times can be sprayed, focusing on the base of the diseased plant and the surface, so that the liquid medicine flows into the cabbage sum for a good effect. Spray twice a week for three weeks.

First, don't use raw manure, and second, use less chemical fertilizers. Three timely use of fungicides, four multi-use (tons of acres) powdered organic fertilizer, five to prevention.

Aphids and whiteflies should be alternately sprayed with 10% imidacloprid wettable powder 1000-1500 times, or 10% acetamiprid 1000-1500 times, sprayed 2-3 times, paying attention to the back of the leaves.

Brassica and Spodoptera exigua were sprayed alternately with cypermethrin 2000 times or cyhalothrin 3000 times before the 3rd instar.

For downy mildew, 1500 times of 25% di-alkynylamide suspension, or 600-800 times of 72% frost urea manganese-zinc wettable powder, used in rotation, sprayed once in 7-10 days, and continuously controlled 2-3 times. Soft rot is sprayed with 4000 times of 72% agricultural streptomycin sulfate wettable powder, or 1000 times of 3% Zhongshengmycin wettable powder.

The cabbage has started to be watered for the last time, when is the best time? If you water it late, it is easy to rot your roots.

If there is a foul smell in the rot place, soft rot is harmful, it is a bacterial disease, which will spread with water, pay attention to control watering to avoid flood irrigation, and at the same time uproot the seriously wilted plants, and disinfect the diseased holes and surrounding robust plants with quicklime. After that, streptomycin, copper ammonia, neophytomycin, mesomycin, copper thiobacterium, thiasen copper, quinolidone, leaf kunin, leaf cumazole, chlorbromoisocyanuric acid, can be killed and other agents were sprayed and irrigated with roots, and they were prevented 2 3 times, 5 7 days once.

If you want to prevent and control cabbage root rot, you can choose good varieties with strong disease resistance, and generally choose straight type and green gang type varieties.

Cabbage rotten roots and rotten hearts may be caused by roots, so it is necessary to strengthen cultivation to avoid the situation of roots. Choose land that is not prone to water accumulation and has good air permeability for planting, and dig drainage ditches to promote the smooth discharge of stagnant water. Do not flood irrigation when watering, keep dry and wet, cabbage growth stage, should control the temperature, if you encounter high temperature weather, you can shade to avoid high temperature roots, cover the mulch film in the later stage of growth, and fertilize frequently to prevent low-temperature roots.

Regular tillage and weeding, loosening the soil, removing weeds, is conducive to the growth of roots.

Cabbage infected with soft rot will also lead to root rot, and it is easy to be infected with diseases in the plots planted in heavy crops, and the plots should be rotated for 3-4 years to reduce the number of diseased plants in the field and reduce the disease.

If a diseased plant is found, it should be pulled out in time to reduce the source of the disease, prevent the spread, and destroy the diseased plant in a centralized manner. After the diseased plant is removed, lime water can be sprayed in the hole for sterilization.

To control pests, cabbage worm and beet armyworm can be sprayed with 3000 times of cyhalothrin and 2000 times of cyhalothrin, and soft rot can be sprayed with 4000 times of 72% agricultural streptomycin sulfate wettable powder and 1000 times of 3% Zhongshengmycin wettable powder.

To prevent cabbage from rotting roots and rotten hearts, it is necessary to select suitable plots for high ridge cultivation, and remove diseased plants and cultivate loose soil during the ecological long period.

In order to prevent the phenomenon of rotten roots and rotten hearts during the growth of cabbage, it is necessary to choose a plot with strong drainage and fertile and soft soil to ensure the permeability of the soil, reduce the probability of water accumulation in the field in the later stage, and provide a good environment for the healthy growth of cabbage roots.

When planting cabbage, it is necessary to do the dry land treatment in time, and apply enough rotted organic fertilizer to the field, and then make small high ridges in the plot, and finally choose the appropriate period for sowing, which is conducive to enhancing the wind and light permeability of the field in the later stage, reducing the probability of slag and reducing the probability of stagnant water and roots.

If the diseased plant is found in the field during the management period, it needs to be pulled out immediately to reduce the source of the disease and prevent the spread of the disease, and then sprinkle lime water into the hole to eliminate the disease.

During the cultivation of cabbage, the air permeability of the soil can be enhanced by cultivating and loosening the soil, promoting the activity of microorganisms in the soil, preventing the emergence of pathogens, alleviating the phenomenon of rotten roots and rotten hearts, and cultivating can also regulate the moisture state in the soil, which is conducive to the extension of the root system and increases the ground temperature at the same time.

After the cabbage rots its roots, you can use streptomycin, copper luoamina, neophytomycin, mesomycin, copper thiazole, thioxen, thiasen, quinolone, leaf kunin, leaf cumazole, chlorobromoisocyanuric acid and other drugs. After the cabbage rots the roots, the first thing to do is to dig out the rotten plants and destroy them, disinfect them around the healthy plants with quicklime, and then find the reason for the cabbage rotten roots and hearts, and use the corresponding drugs.

Introduction of cabbageOriginally distributed in North China, cabbage is widely cultivated throughout China, and it is relatively cold-tolerant, prefers cold climate, and is not suitable for planting on poorly drained clay soil. Cabbage is one of the common vegetables, the leaves can be fried, raw, salted, pickled, pickled, and the outer layer of the leaves can still be used as feed.

The cabbage flowers are bright yellow, centimeters in diameter; peduncle 4, 6 mm long; Sepals oblong or ovate-lanceolate, 4.5 mm long, erect, pale green to yellow. Cabbage is suitable for growing in the cold season, but if it is cultivated in the high temperature season, it is prone to diseases and insects, or the quality is poor and the yield is low, so it is not suitable for cultivation in the summer.

Cabbage is rotten and rotten, and farmers can use chlorobromoisocyanuric acid, Zhongshengmycin, thiamobium copper, copper hydroxide, copper ammonia and other agents.

Cabbage root rot is a typical feature of soft rot, and the disease is generally more serious in the bulb stage. After the cabbage is planted, when the pest cannot be controlled, it increases the chance of bacterial invasion. There are two main types of soft rot, the basal rot type, that is, the rot at the base of the stem, the appearance of detachment, heart rot type, the rot of the heart leaves from the inside to the outside, and the rotten roots and rotten hearts are accompanied by a foul smell.

Soft rot is a bacterial disease, which should be prevented and treated with bactericidal agents, mainly including root irrigation and foliar spraying. Once the occurrence of cabbage soft rot occurs and the infection time is long, a variety of measures should be taken to comprehensively prevent and control it. When spraying pesticides, the nuclear book Chang also changed to alternate use.

Zhongshengmycin and chlorobromoisocyanuric acid, these two agents have a certain preventive effect on cabbage root rot. In the early stage of the disease, farmers can use 1% Zhongshengmycin water solution 200 times liquid spray control. Or use chlorobromoisocyanuric acid whole field spray, which can also play a role in prevention and control.

When the cabbage root rot is more serious, farmers can use copper preparations to spray and control, and fungicides with protective and advanced effects should be selected. Thiazobium copper is an organic copper preparation, which is safe for cabbage when sprayed, and generally rarely causes pesticide damage. Copper hydroxide and copper ammonia belong to inorganic copper preparations, which are prone to pesticide damage when used, and the dosage can not be blindly increased.

It can be sprayed with 4000 times of 72% agricultural streptomycin sulfate wettable powder and 1000 times of 3% zhongshengmycin wettable powder.

Cabbage propagation and cultivation techniques.

Fertilization and land preparation: 2000 to 3000 kg of organic fertilizer per mu, 60 kg of potassium sulfate compound fertilizer as base fertilizer. Deep ploughing 30 to 40 cm, leveling and raking fine after ridge spacing, ridge spacing 60 cm, ridge standard for the bottom width of 35 to 40 cm, neck width of 20 to 25 cm, ridge height of 20 cm.

The soil ridges are compacted to facilitate sowing.

Watering to create moisture: When the soil moisture is insufficient, it is necessary to water and create moisture before preparing the land after applying basal fertilizer.

Fine sowing: The main sowing method of Chinese cabbage in autumn is live broadcasting, which is divided into two methods: strip sowing and hole sowing.

Strip sowing: open a shallow ditch to a depth of centimeters in the middle of the ridge, spread the seeds evenly in the ditch and then cover the soil and compact, with a seed amount of about 120 grams per mu. You can also use cabbage seeding machine, sowing in the middle of the top of the ridge, with a seed amount of 80 to 100 grams per mu, and the seeding machine should be equipped with soil covering facilities.

Hole sowing: at the top of the ridge according to about 55 cm hole spacing, and the soil ridge perpendicular to the length of 10 to 15 cm, deep to centimeter of the ditch, each ditch sowing 5 to 6 seeds, after sowing cover fine soil centimeter compaction, per mu with 100 to 120 grams of seeds.

Cultivation techniques. Seedlings: 5 to 6 days after the emergence of seedlings, the first seedlings, to the weak and strong, strip sowing seedlings spacing 2 to 3 cm; When the Chinese cabbage has 3 to 4 leaves, the seedlings of the strip sowing plot are 8 cm, and about 3 plants are left in each hole when the hole is sown; After another 5 to 6 days, the third seedling is sent.

Seedling: Seedlings grow for about 25 days to reach the cluster stage, according to the plant spacing of 50 to 60 cm seedlings, leaving about 2,000 seedlings per mu. If the lack of seedlings is found, it should be replanted in time, and the seedlings should be watered in the afternoon or cloudy day on a sunny day.

Cultivating and weeding: 3 times of tillage, respectively after the second seedling, after seedling setting and in the middle of the rosette. Cultivating combined with weeding.

Reasonable watering: If the bottom moisture is insufficient, water in time after sowing to ensure that the seedlings are strong and strong. After thinning seedlings and setting seedlings, water 1 water each. Initial watering promotes the growth of trees. During the balling period, watering should be carried out in combination with top dressing, and the amount of watering should be large and uniform. In the later stage, appropriate water control promotes the core wrapping.

Timely top dressing: 15 to 20 acres of nitrogen, phosphorus and potassium compound fertilizer per mu at the rosette stage. At the beginning of balling, 30 to 40 kg of nitrogen, phosphorus and potassium compound fertilizer were applied per mu.

No more topdressing within 20 days before harvest. Combined spraying at the rosette stage begins with 1 spray of foliar fertilizer every 7 to 10 days, a total of 2 to 3 times, using a mixture of urea and potassium dihydrogen phosphate, sprayed after 16 o'clock.

Harvest: After mid-November, Chinese cabbage basically stops growing and enters the harvest period. After the beginning of December, it should be harvested in time to prevent frost damage.