How to treat a large area of cabbage that has suffered from leaf rot?

When fertilizing the land, calcium should be added, such as spraying quicklime.

or lime, or use well-rotted farmhouse fertilizer. You can also spray chelated calcium fertilizer from top to bottom and then cored, and evenly and thoroughly spray a bucket of 40 grams of chelated calcium fertilizer water. Or use superphosphate.

Liquid. Starting from the stem base of the Chinese cabbage, it begins to rot at the junction with the outer side of the Chinese cabbage, and then gradually spreads to the heart leaves. This is known as Chinese cabbage soft rot, a bacterial disease that is prone to occur during the heading stage. In prevention, copper preparations, such as copper hydroxide, can be used.

or gold and copper, 7-10 days apart, then alternate a second time. For the second time, it can be combined with iprodione and neophytomycin. Soft rot of Chinese cabbage can also cause huge losses during storage.

Choose varieties with strong disease resistance, strengthen field management, and spray pesticides in advance to prevent soft rot.

Timely control of aphids and cabbage worms.

Diamondback moths and underground pests. 2.At the beginning of the disease, 72% of the agricultural streptomycin 3000-4000 times solution was sprayed with a new high-lipid film foliar spray, focusing on the diseased plants and surrounding plants, and paying attention to the spraying of petioles and stem bases near the ground.

When the disease is severe, the roots can be irrigated with a root dressing and 700 times the solution of ground pine. Cabbage suffers from atrophic disease, usually in 6-7 true leaves.

Phase begins. The symptom of this disease is that the leaves of the entire plant become pale and wither as if dehydrated until they die. The root system of diseased plants is short and few, and it is in a state of waterlogging and decay.

When the disease is severe, the root system is easy to be uprooted, the stem base is shortened laterally, and the cut surface produces light brown rot, which has no odor.

In the early stage of atrophy, 75% chlorothalonil wettable powder can be sprayed 600 times, or Pulix water 600-800 times, with an interval of 7-10 days, and sprayed 2-3 times continuously. For seriously ill plots, you can irrigate the roots 900 times with 69% Anke manganese-zinc wettable powder, 75-100 ml per plant. Cabbage is mainly divided into natural cracks, insect marks, and mechanical damage.

At the cabbage stage, the resistance to soft rot decreases. In rainy environments, wounds are prone to disease, and the disease is more serious in continuous cropping, low-lying areas, and early sowing areas. Choosing disease-resistant varieties for planting, combined with tomatoes, potatoes and other vegetables or continuous cropping, can effectively reduce diseases in the soil.

After the crop is harvested, it needs to be deep and dried to promote the decay and decomposition of disease residues.

Choosing varieties with strong disease resistance can prevent cabbage leaf rot to a certain extent. When diseased plants are found, they should be uprooted in time and taken out of the field to be burned or buried deeply, which can reduce the transmission of the source of infection. Avoid excessive dryness or wetness in the field, especially when wrapping the core, and prohibit flood irrigation.

It is necessary to apply more organic fertilizer, and love in the case of comprehensive nutrition of organic fertilizer, which can avoid dry heartburn caused by calcium deficiency, and can also greatly improve the calcium deficiency caused by salinization in the field.

1.Crop rotation to avoid continuous cropping. 2.

Cultivation of high furrows. Except for arid and water-scarce and saline-alkali land, high furrow cultivation should be used, and the furrow height is 5-10 cm. 3.

Water lightly with small water, avoid flooding with large water, and drain water in time after rain. 4.Increase the application of phosphorus and potassium fertilizers, and use light film fertilizers to enhance disease resistance.

Planting Chinese cabbage is always rotten, which is a headache for farmers, there are two main symptoms that cause Chinese cabbage to rot, one is wilting disease, one is soft rot, these two diseases are actually very simple, spraying pesticides can be prevented: Symptoms of wilting disease and pesticide control methods: The onset period of wilting disease starts from the 6 7 leaf stage, and the symptoms of wilting disease are from the bottom to the top The leaf color becomes lighter, dull, and the water loss is wilting, and the whole plant will continue to wilt rapidly until death.

The root system of the diseased plant is short and few, it is water-stained and rotten, it is easy to pull up when the disease is serious, the base of the short shrunken stem is cut horizontally, the cut surface is light brown rot, there is no foul smell, and the characteristics of this symptom are different from that of soft rot.

Due to the low-lying terrain, the water in the field, or due to excessive rain and poor drainage, the humidity in the field is too high, resulting in the root system being anoxic and browning, resulting in rot. The problem of root rot of Chinese cabbage has also aggravated, and it is particularly obvious in some places, which has a certain impact on the yield of Chinese cabbage. It is recommended to strengthen cultivation, reduce soil moisture, avoid flood irrigation, can also carry out pesticide prevention and control, spraying in the early stage of the disease, commonly used pesticides are 72% agricultural streptomycin sulfate soluble powder 3000-4000 times solution, new phytomycin 4000 times solution, 14% copper complex ammonia water 350 times solution.

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.

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. In the early days, the plants wilted at noon on sunny days and recovered in the morning and evening. After expansion, the outer leaves of the diseased plant are lodging, flat on the ground, the heart and leaf bulb are exposed, the pith tissue at the rhizome is rotten, and gray-brown mucus flows out, and the diseased plant is folded lightly, and there is a foul smell at the rot.

It may be that the leaves will never recover, and will slowly extend to the roots, causing root rot. There is also a situation where the outer leaves are relatively normal, but when the outer leaves are peeled off layer by layer, they are found to be rotten, and some of them spread to the roots and fall off.

<> frequent rainy weather, it is a kind of crop that is more afraid of waterlogging, and then the soil humidity is high, and even the water in the garden is large, resulting in the impermeability of the soil at the root of the cabbage, so that the root rot and heart phenomenon occurs. 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. ）。

Cabbage is a colder vegetable and prefers mild, cool climates. It is particularly sensitive to hot and cold weather, and prefers humid environments. However, if there is too much water in the ground, waterlogging will occur.

This can happen when the weather temperature is particularly high or low at the time of planting, and it is cloudy and rainy in the season. There is too much water in the soil, so the roots of the cabbage will die due to lack of oxygen, and the roots are prone to soaking.

There are many reasons for this. There are roots caused by physiological diseases, and there are also pathological roots such as rotten roots caused by soft rot. This has a lot to do with excessive rainfall, high soil moisture, and high and low temperatures.

Chinese cabbage is a semi-cold-tolerant vegetable, which likes mild and cold climates and is not tolerant to heat and cold, while Chinese cabbage likes humidity but is not resistant to waterlogging. Under the conditions of high temperature and hot or low temperature and cold, in case of continuous rain or flood irrigation, Chinese cabbage will be in a state of stagnant water for a long time, which will lead to tissue necrosis and root rot in the roots of cabbage due to lack of oxygen. In the early stage of Chinese cabbage growth, due to the high external temperature, it is easy to have high-temperature root rot. In the late growth stage of Chinese cabbage, with the decrease of the outside temperature, it is easy to have low-temperature root rot.

Chinese cabbage has rot inside, usually a symptom of cabbage soft rot or lack of nutrients, Chinese cabbage soft rot is also a disease that Chinese cabbage is prone to, the main reason is that the Chinese cabbage is infected by bacteria and the disease occurs, this pathogenic rapid grinding letter fungus is usually in the early stage of Chinese cabbage growth, and the insects are carried into the mu when they are harmed.

If the Chinese cabbage is good on the outside, it is likely to be caused by excess water or short sunshine hours on the inside.

If the soil where Chinese cabbage is planted belongs to the saline alkaline soil or the irrigation water of the Chinese cabbage field is heavily polluted, or the ammonium nitrogen fertilizer is used too much, or the waterlogging in the field is uneven, especially the soil water is less than the more severe drought, etc., resulting in root burning and root injury, so that the digestion and absorption of the rhizome of Chinese cabbage is destroyed, resulting in the trace element calcium can not be transmitted to the white leaf tips for its normal growth and development, so physiological pests and diseases appear, causing the production of dry stomach heartburn. In addition, if the land where cabbage is grown is seriously deficient in active manganese, it will also cause the disease.

The prevention and control method of Chinese cabbage rotten heart can still prevent problems before they occur, so it is necessary to pay attention to them gradually from the seed level, first select these cabbage varieties with weak disease resistance, and at the same time plant them at a moderate stage. Secondly, at the fertilizer level, we should choose fermented organic fertilizers as much as possible. For example, in rainy days, it is necessary to pay attention to the immediate drainage pipes, and to ensure that the fertilizer and water management methods are harmonious to prevent the lack of fertilizer in Chinese cabbage, especially calcium deficiency.

At the same time, it should be noted that during the coring period of Chinese cabbage, it should not be infiltrated by floodwater.

Not only animals will be deficient in calcium, but green plants will also be deficient in calcium, and sometimes, the leaves wrapped in cabbage look beautiful, but there is a rotten heart and curled leaves inside, all because of calcium deficiency. During the planting process, this is called calcium deficiency. In the final analysis, the root cause is that the calcium in the soil is insufficient, which causes the growth and development of the leaves on the outside of the Chinese cabbage and the slow growth and development of the leaves inside, causing the core of the leaf bulb to rot and the old leaves to turn yellow.

In view of this kind of calcium deficiency, the first thing to understand is to change the land for planting.

The main factors of Chinese cabbage rottenness: First, it is unreasonable to fertilize Chinese cabbage. The growth period of Chinese cabbage, because of the partial application of basal fertilizer.

Too much use of chemical fertilizers with too strong nitrogen content will destroy the structure of the soil on the one hand, reduce permeability, and on the other hand, it will also harm the absorption of calcium by plants due to the inhibition of the active activities of microbial species in the soil. The second is because of climate and moisture. The dry climate and drought of land resources will increase the salt concentration value at the roots of Chinese cabbage, reduce the proportion of calcium, and in addition to the high temperature weather, the plant respiration of Chinese cabbage is too strong, and the function of absorbing water and nutrients at the roots is weakened, all of which are due to the annoyance of Chinese cabbage.

Cabbage soft rot is a common disease that can lead to heart rot when it occurs. Pests carry the germs to the plants when they eat the cabbage, and under the right temperature, the germs will gradually spread until the whole plant rots. Dried cabbage heartburn is a physiological disease caused by the inability of the root system to transport enough calcium, after the occurrence of heartburn, the appearance of the diseased plant is not significantly different from that of the normal plant, but the heart leaves have deteriorated and are inedible.

When the cabbage heart is bitten by an insect, it will infect the cabbage with rotten bacteria. When the air temperature is warm, the germs will slowly spread to the **, which will cause the phenomenon of plant decay. There is also an excess of manganese deficiency that can also lead to heartburn due to calcium deficiency and insufficient root system transport.

There are many reasons for the rot of Chinese cabbage, which may be caused by poor varieties or natural disasters. Field management should be taken care of during the growing season.

The method of leaf rot disease of cabbage is as follows: spraying 3000 4000 times of streptomycin sulfate or 72% agricultural streptomycin sulfate soluble powder, or 4000 times of new phytomycin, once every 10 days, 2 3 times in a row.

Cabbage rot disease is one of the more serious diseases in the cabbage planting industry, which will affect the quality and yield of cabbage, and should be reasonably changed when planting Chinese cabbage, long-term sitting will cause pathogens to parasitize in the soil, and it is easy to be infected with rot disease in the rainy season.

In the high incidence period of rot disease, prevention should be done, and timely spraying should be carried out in the early stage of the disease to prevent the spread of germs. The germs should be pulled out in time and taken out of the field for destruction.

There are three common symptoms of Chinese cabbage leaf rot: stem base rot, gourd rot and leaf rot.

The following medicines can be used**Chinese cabbage leaf rot disease:

1. You can choose 2000 times of 72% agricultural streptomycin sulfate soluble powder or 2000 times of neophytomycin, spray 1 time every 7 days, and spray 2 3 times in a row.

2. Soft rot bacteria like alkaline environment, and vinegar can be added 500 800 ml per mu during prevention and control, which is conducive to improving the disease resistance of plants.

3. Add 50 kg of water with 100 150 grams per mu of vegetable Fengling, spray 1 2 times or drip into the vegetable field with 751 liters per mu with agricultural resistance.

In the early stage of the disease, spray 600 times of chlorothalonil wettable powder of 75, or 500 times of alum wettable powder of 60, or 600-800 times of Pulik water solution of 72 2, spray 1 time every 7-10 days, and spray 2-3 times.

Detailed introduction of rot disease: also known as rotten skin disease, stinky skin disease, etc., is a common disease that fruit trees are very prone to produce, and it occurs all over the world. Rot disease is usually caused by hundreds of soil-borne bacteria or fungi and requires special attention.

Pathogens: Plant diseases caused by hundreds of soil-borne bacteria or fungi, characterized by the disintegration and decay of plants. Decay can be hard, dry, spongy, or watery, chyme, or sticky.

Occurrence law: usually after the fruit tree enters the fruiting period, rot disease begins to occur, with the increase of tree age and the continuous improvement of yield, rot disease will increase year by year, under normal management, the tree load is a key factor affecting the disease.

Preventive measures: Prevention plan: Before the onset of the disease, use 1 bottle of mother liquor and 30 kg of dilution with water to fully spray the tree body and ground disinfection.

Take the drug once every 15 days. Strengthen operation and management, timely pruning and thinning, ventilation and light transmission, and improve plant stress resistance. Cut down the diseased plants in time and burn them to reduce the pathogens.

Select local tree species with strong stress resistance to create mixed forests.