Cabbage shedding disease is very harmful, how to prevent it?

The base of the petiole and the rhizome completely decay and turn into a grayish-yellow sticky substance that emits a foul smell and falls down when the leaf bulbs are touched, which is called "rotten bumps". The inner and outer leaves are good, and only the middle leaves rot from the edge to the inside, commonly known as "skin rot". Prevention and control methods: Chemical control before the onset of the disease or at the beginning of the disease, should be started spraying to prevent transmission, spraying every 7 days or so.

72% agricultural streptomycin 1000 times and neophytomycin 4000 times are commonly used. During the spraying, the petiole and stem base are mainly sprayed, so that the liquid can fully contact the short stem of Chinese cabbage, and the central diseased plant and its surroundings are specially sprayed to prevent spread.

Do not store cabbage immediately after it has been cut. It is generally recommended to dry in the field for a period of time, with the roots facing the sun, so that the vegetable tree can stand upright and the outer leaves can be hung without folding. This can reduce mechanical damage, improve cold resistance, reduce the volume of cabbage, and increase storage.

However, the drying of vegetables should not be excessive, otherwise, the tissues wilt, disrupt the normal metabolic function, strengthen hydrolysis, will promote cracking, reduce the storage tolerance and disease resistance of Chinese cabbage. Many farmers are stumped by the problem of Chinese cabbage. There are several key points, and the comprehensive prevention and control is effective in arranging the sowing date according to climatic conditions, and it is suitable for late sowing.

Carry out the cultivation of high ridges and high furrows, and do a good job in the management of seedlings.

Generally, maggots are controlled with phoxanthaphos when applying basal fertilizer. Because it is against the top of the cellar, it will cause poor ventilation and cause the cabbage to be peeled. After the cabbage enters the cellar, it needs a lot of ventilation to remove the heat from the cellar and prevent the cabbage from falling off.

At the same time, the peasant doctor should be diligent in pouring out hemorrhoids. At this time, you must not be lazy, and you must pour the pile several times, so that the temperature of the cabbage can be quickly lowered. Choose disease-resistant varieties.

Sow seeds at the right time, generally not too early, and try to avoid the hot and dry season. Strengthen on-site management.

In dry years at the seedling stage, if the ground temperature is too high, it is necessary to water and cool down frequently to ensure the normal development of the root system. Pharmaceutical methods are not suitable for flood irrigation at the seedling stage. When placing **, water the roots once with 50% carbendazim 1000g 300ml of 300ml of Japanese granules magnesium, and each plant consumes about 200ml of water.

During the riser period, 1000 g of 50% carbendazim, 1000g of 75% chlorothalonil, and 2kg of potassium dihydrogen phosphate were used to irrigate the roots once per mu, and the water consumption of each plant was about 150ml. Less nitrogen fertilizer and more phosphorus, potassium and magnesium fertilizer. When insect control and disease control are combined, when adding 30% 10ml of oxazole water agent to plough the land, humic acid can be added in real time, and 80-100 kg per mu can be applied.

Be sure to choose disease-resistant varieties and try not to plant them in the summer. Usually to prevent the soil from drying during the seedling period, if the temperature in the ground is particularly high, be sure to water more to cool down. Don't water too much water during the seedling period, be sure to spray some special agents in time, use more phosphate fertilizer, potassium fertilizer, **, do not use nitrogen fertilizer.

If such a disease occurs, the most important thing to do is to water it in time and fertilize a large area, so as to ensure that this situation does not occur in the future.

1. Choose disease-resistant varieties.

2. Sow seeds at the right time, generally not too early, and try to avoid the high temperature and dry season.

3. Strengthen field management. Squatting seedlings moderately, change the habit of squatting "full moon", prevent soil drought at the seedling stage, and water and cool down frequently in case of high ground temperature in dry years at the seedling stage to ensure the normal development of the root system.

The symptoms of Chinese cabbage shedding disease, such as Chinese cabbage, yellow bud white, Chinese cabbage, yellow leaf disease, occur from north to south. The disease occurs at the seedling stage. After the seedlings are fixed or planted, they grow slowly, half of the leaves turn green, causing half or the whole leaf to wilt, it seems that there is a lack of water, the diseased plants are pulled up, the fibrous roots are few, and the taproot and vascular bundles are dissected.

Symptoms of cabbage shedding disease, Chinese cabbage, small cabbage, yellow leaf disease such as cabbage and yellow bud white occur from north to south. Onset is seen at the seedling stage. After the seedlings are fixed or planted, the growth is slow, half of the leaves fade green, causing half or the whole plant to wilt, like lack of water, pull up the diseased plant, have few fibrous roots, cut the taproot, and the vascular bundles turn brown.

After the rosette to the early stage of the center, the leaves begin to yellow, and enter the middle stage of the center, the old leaves fade and turn yellow between the veins, and the veins around the veins remain dark green, and the posterior leaf margins lose water and shrink and curl inward, causing the plants to shrank or die.

The symptom of Chinese cabbage shedding disease is that the leaves of the cabbage are constantly falling off, resulting in a smaller yield of Chinese cabbage and little harvest.

Prepare more plant ash (plant ash is to kill all kinds of insects that eat leafy vegetables), after transplanting, give a handful of plant ash to the vegetable seedlings next to the vegetables, so that insects can prevent eating vegetables, and the easiest way is: you can also find some stone powder to sprinkle next to the vegetables and cabbage leaves Control method: soak the seeds with warm water for half an hour before sowing, take out the sowing or germination sowing after cooling, or soak the seeds with 50% dyssenamine 200 times for 15 minutes, wash and dry the seeds.

Reasonable crop rotation, reasonable fertilization, avoid partial application of nitrogen fertilizer, and the onset of disease is spraying Bordeaux liquid.

There are not many diseases of cabbage, generally there are blight, leaf spots, mainly in the seedling stage. As long as it is well managed, it generally has little impact. The main insect infestation is very serious, and the most experienced infestation is cabbage worm, aphid and borerworm.

Throughout the growth period, butterflies flutter and lay eggs that float into green insects that harm the leaves. The main insect pests of cabbage are: diamondback moth, cabbage worm, whitefly, aphid, etc.

In spring, damage generally occurs after late April, and control measures should be taken in summer and autumn from one week after the emergence of seedlings. Virus diseases, black rot, root swelling, soft rot and so on will also occur during the planting process.

Cabbage blight: also known as black root disease. It mainly infects the rhizomes of seedlings, and the pathogenic part turns black and shrinks, and the wet part lasts for a long time with white mold.

After that, the leaves can be seen to wilt and even die. A small number of adult plants can still develop the disease. It is a soil-borne disease, and seeds, bacterial, organic fertilizers, etc. can also spread, and insect pests such as aphids and cabbage insects can also occur in the management of vegetable seedlings.

These pests often hide on the back of the leaves to breed and multiply, if not controlled early, it will be difficult to control when the pest increases, even if a lot of pesticides are sprayed.

Prevention and control methods: when the larvae are harmed, start spraying pesticides, commonly used pesticides are chrysanthemum emulsifiable concentrate, chrysanthemum emulsifiable concentrate, the control effect is better, but pay attention to the alternate use of pesticides, so as not to cause resistance. It is necessary to take preventive measures, rotate crops reasonably, reduce soil germs, and carry out pesticide seed dressing on planting before sowing and planting to eliminate the germs carried by seeds.

When one or two plants become diseased, they can be directly uprooted and taken out of the field, and the disease hole can be disinfected.

Pesticides. Because my family has been growing cabbage for more than ten years, I have been sprayed with pesticides every year, so I have never had shedding disease, so I should use pesticides.

Strengthen scientific management, and at the same time select disease-resistant varieties, but also pay attention to early prevention, but also spray pesticides, pay attention to watering and sowing season.

It is recommended that pesticides can be used, because pesticides can be very good for shedding disease.

In this case, pesticides should be sprayed in time, and pests and diseases should also be controlled, and fertilizer and watering should also be done in time, and it is also necessary to do a good job of loosening the soil.

It can be prevented by medication. Some drugs can ** the case of cabbage falling off.

Summary. It can be sprayed with iprodione and copper preparations, focusing on the soil surface and the affected part of the stem base, and spraying twice in a row during the safety interval.

What kind of disease is cabbage like this, and how is it?

Hello. Could you please send us a **.

May I ask what kind of disease this dish is, how to use what medicine is more effective now, faster** better, can the dish still be wrapped in the future.

Hello, is it a drought?

It can be sprayed with iprodione and copper preparations, focusing on the soil surface and the affected part of the stem base, and spraying twice in a row during the safety interval.

I just finished taking the potion the day before yesterday, and it rained yesterday, and today I went to see it like this, and there are a lot of them, and I feel that the dishes have become smaller.

Will the disease spread?

Will it affect the wrapping?

After a week, do you see if the pesticide concentration is high?

Isn't it downy mildew.

I look at your ** not as bad as downy mildew.

**Scheme: 1. When the disease is mild: spray with 38% chloroxystrobin diluted with 800 times of liquid, and use the drug once in 5-7 days;

2. When the condition is severe: spray according to 600 times dilution solution, take the drug once every 3 days, and the number of spraying depends on the condition.

Yes, you can give some medicine to the cabbage, and the cabbage will do. It's back to normal. It can't be rotten anymore.

This cabbage can't be cured by derotting, this is because the cabbage you planted too early, resulting in the cabbage rotting and derotting.