Wanted to ask me why the leaves wilt when the grapes I have just planted for a few months.

According to your ** and the situation narrated, it may be the daily burn caused by the stagnant water roots. The reasons for the analysis are: excessive precipitation, water accumulation in the field for more than 24 hours, resulting in hypoxia in the roots, reduced vitality, reduced ability to absorb water nutrients, and the weather suddenly cleared, the light was strong, the wind speed was larger, the leaves lost too much water, and the water was insufficient, so it caused solar burn.

The disease is physiological and not contagious. Countermeasures and suggestions: 1. Strengthen field management, especially pay close attention to cultivating loose soil, improve soil permeability, and promote root recovery function; 2. Cut off the dead leaves; 3. Foliar spraying of 300 times of urea + potassium dihydrogen phosphate mixture to supplement nutrition; 4. Spray fungicides such as ethylene frost manganese zinc to prevent downy mildew.

Sunburn. Pay attention to reasonable fertilization and irrigation.

Do not overdose. Foliar feeding with some potassium dihydrogen can be considered to slow down.

Weiwei agricultural materials, agricultural materials experts around you. **。

Too much watering (including rain) or poor ventilation can cause the leaves to turn yellow. Many people are always afraid that their flowers and fruits (including grapes) are short of water, so they often water desperately, but they don't know that this just plays the opposite role, you know, plant growth needs to rely on the roots to absorb water to maintain the growth of its branches and leaves, but the roots need enough air to maintain, more water natural air is less, long-term moisture will make its roots in a "suffocation" state, so how can flowers and plants grow well? Generally, long-term wet plants in potting soil will show the phenomenon of "leaf yellowing, wilting, slow growth, gray and dull leaf surface, and leaf loss", and at the same time, long-term moisture will induce the invasion of many germs, and eventually lead to the death of flowers and fruits.

In addition, the lack of iron fertilizer also causes the leaves to turn yellow. You can apply some foliar fertilizer with chelated iron.

In the process of growing grapes, we often encounter yellowing and drying leaves, but we don't know what is going on. Actually, the reason is very simple. Now, let's talk about this topic.

1. Control watering.

The phenomenon of wilting leaves of grape vines may be caused by improper watering, such as too much watering when watering, which makes the roots waterlogged, or too little watering makes it in a drought state.

2. Turn over the soil.

Another way to improve the leaf wilting of the vines is to turn the soil, turn the soil where the vines are located, break up the compacted parts so that they can become soft and suitable again, and if there are salinized parts, replace these parts to ensure the suitability of the soil.

3. Temperature adjustment.

The vines are suitable for living in a warm environment, if they live in a cold environment for a long time, or if they suddenly suffer from a cold environment, the leaves may wilt, and it is necessary to take timely measures to keep warm and windproof to ensure that the ambient temperature around them is stable above 15 degrees Celsius, so that the plants can grow well enough.

4. Fertilization control.

When fertilizing the vines, it is necessary to uphold the principle of thin fertilizer and diligent application, and the fertilizer used must be diluted, and it is not possible to use raw fertilizer that has not been matured, and a small amount can be applied many times, so as to avoid the phenomenon of burning roots caused by excessive fertilization, and to avoid the leaves of the plant from continuing to wilt.

Without strengthening orchard management, timely cultivation and loosening soil, fertilization and irrigation can meet the needs of fruit trees for water and fertilizer, which can enhance tree potential and improve fruit trees' insect resistance and disease resistance. 2.Bacterial wilt treatment scheme scheme 1:

30ml of R. solanacearum rick mixed with 15 kg of water, irrigated roots, about once in about 7 days, and once about 5 days before flowering. Plan 2: 30ml of R. solanacearum + garlic oil mixed with 15 kg of water, irrigated the roots, once in about 7 days, and once in about 5 days near the flowering period.

3.Fusarium wilt treatment measure 1, foliar spraying: 41% polyastatine pyrimemylamine 600-800 times diluted and evenly sprayed, when the disease is serious, the dosage can be appropriately increased.

2.Root irrigation: dilute the diseased plants 600-800 times for root irrigation; If the pathogen is harmful to the aboveground parts at the same time, the aboveground parts should be sprayed at the same time as the root irrigation, and the medicine should be applied once every 7 days or so.

4.Root rot treatment measures: Root irrigation can be carried out with methyl frost or copper preparations.

5.Scale insect pest treatment measures: Combined with plastic pruning, the branches with insects can be burned in a concentrated manner, which can greatly reduce the number of insects.

1. Prevention and control in the dormant period of fruit trees, spraying 3 stone sulfur mixture, 3% 5% diesel ES or 5% 6% coal tar ES, has a good control effect on scale insects, and can also treat aphids and leaf mites. FYI.

1. Improper watering.

Vine. The requirement for moisture is high, and too much or too little water will have a greater impact. Overwatering will have a greater impact on the growth of new leaves, and they will become thin and yellow, with a dull color.

Insufficient watering will damage the old leaves, resulting in wilting and scorching yellow, and the leaves will fall off one after another.

Solution] When the summer is hot, water it once a day in the morning and evening. In autumn, the amount of watering should be appropriately reduced, and it should be watered once every two days. In winter, the plants are dormant, and watering only needs to keep the potting soil moist, about once a week.

In the spring, the plants sprout and need to be watered every 2 to 3 days to keep them well hydrated.

2. Improper fertilization.

Lack of fertilizer in the vine can lead to a pale yellowing of the new leaves and a malnourished old leaf.

Excessive fertilization will seriously affect the growth of flowers, the color of the flowers will turn yellow, the new branches will be dull and the leaves of the old branches will fall off.

Solution]: When we fertilize the vines, we should pay attention to the thin fertilizer and apply it frequently. In spring, nitrogen fertilizer should be applied to promote flowering.

Then top dressing phosphorus and potassium fertilizer to ensure that the fruit is nutritious. During the growing period, fertiliser is applied about every four days, and urea is added once the roots are firmly established.

and Nica potassium monobasic phosphate.

The use of thin fertilizer is kept once every three days.

3. Insufficient light.

Grapevines love light, and vines that have been cultivated indoors for a long time will not be able to photosynthesize normally due to lack of light.

As a result, the leaves will turn yellow and fall off one after another, and the new leaves will be weak and thin, and in severe cases, it will even lead to the death of the whole plant.

Solution]: When we plant grapevines, we should ensure that they are given enough light to promote the growth and development of grapes. It is best to move it outdoors, in a window, or in a sunny place to promote chlorophyll.

of growth. Fourth, strong light irradiation.

Excessive light exposure can also damage the vines, causing leaf burns, dry and yellowish flowers and branches in the sunrise area, yellow spots on the surface of the grapes, and reduced fruit quality.

Solution]: We should pay attention to shade during the high temperature in summer and keep the vine growing environment ventilated and breathable. Many flower lovers may only know what to do when the leaves of the vine are yellow, but they don't know that light can also have a huge impact on the grape fruit.

Proper light can not only change the yellowing of the leaves of the vine, but also make the fruit juice full, sweet and sour.

5. Pest and disease hazards.

When we care for the vines, we may notice small white spots or black-brown spots on the leaves, which may be gray mold and black pox. In addition to this, there are many other conditions that can cause the leaves to turn yellow, such as anthrax.

White rot, downy mildew, white rot and black rot, etc.

Solution]: Once pests and diseases are found, we should remove the yellowed leaves and dead branches in time, and then spray 1500 times the solution of Sukrin to prevent and control gray mold, and use 200 times the amount of Bordeaux liquid.

600 times mancozeb.

Spray to kill black pox. If it is other diseases, it is also necessary to prescribe the right medicine, observe carefully, and prevent and treat it as soon as possible.

First of all, we need to determine whether the soil we are planting is suitable for the growth of the vines. The vine has a relatively well-developed root system and is highly adaptable to the soil. It can grow in soils such as clay, loam, and silt.

However, it should be noted that the land with iron deficiency is not suitable for growing vines, because it will cause iron deficiency in the vines during the growth process, which will cause the leaves of the vines to turn yellow, the seedlings to grow poorly, and eventually, the vines will wilt during growth. At the same time, soils that are too acidic are not suitable for the growth of vines (pH less than 4), as they can lead to root rot and eventually wilt. We can grow vines in loose sandy soils.

Secondly, the vine may also be wilted due to too much watering. Excessive watering can cause a significant increase in soil moisture, which can lead to a constant immersion of the vine roots in water, which can lead to rot of the vine root system and gradually lead to wilting of the vine. At the same time, too much watering can also cause the soil to lose nutrients due to excessive moisture, resulting in the loss of nutrients needed by the vines.

In general, during the germination and flowering phases, we can replenish the grapes with sufficient water to ensure that the seeds germinate and that the grapes are well hydrated. In normal times, watering can be done once every 4 to 6 days.

Finally, diseases can also cause vines to wilt, often with powdery mildew, downy mildew, black pox and other diseases that cause vine wilting. These diseases gradually lead to rotting and necrosis of the vines, and eventually to the wilting of the vines. This requires us to manage the grapes as they grow.

We need to plant the grapes in a sunny area to avoid getting too wet and getting sick. In summer, we should prune, drain, weed, and prune diseased branches in time. We can also use pesticides, but we need to pay attention to the frequency of pesticide use should not be too frequent.

At the same time, we can also fertilize the vines properly to improve their resistance.

Therefore, unsuitable soil, excessive watering, diseases and other causes can cause the vines to wither.

It may be that the way you planted it was not particularly good, so it withered. It may be that the fertilizer and water management is not very good, it may be that the temperature is not very suitable, it may be that the soil is not very good, it may be that there are some pests and diseases, it may be that some drugs are used too much.

Because grapes are a delicate plant, they need a lot of water and nutrients, and when the water and nutrients are not high, they are easy to wither.

Because we don't know how to plant, we don't have water during the planting process, we don't water it in time, and then it wilts.

Causes of dry grape leaves:

First, there is a problem with the grape root system.

Because the yellowing of the leaves is definitely due to the inability of nutrients to reach the leaves, the priority is whether there is a problem with the grape root system, which may be caused by underground pests and diseases, or it may be caused by improper fertilization of the grape root necrosis, or the soil itself is sticky and not breathable.

Second, the water volume is not evenly controlled.

Grapes themselves are drought-loving plants, if the water application experience is insufficient, a large amount of water will cause the root system to absorb too much water and the water content in the leaf surface is also beyond its own carrying capacity, if the drought is encountered later and the temperature and light and other unfavorable conditions are generated, it is easy to make the leaf surface injured and produce yellowing.

3. Lack of trace elements.

If the amount of nitrogen, phosphorus and potassium compound fertilizer is not strictly controlled, resulting in the inhibition between the elements, there will be a lack of trace elements such as calcium, magnesium, zinc, boron and other trace elements in grapes, resulting in the phenomenon of yellowing and even death of the leaves, so it is necessary to apply a large amount of mature organic fertilizer to quickly supplement various trace elements.

4. Pests and diseases.

To prevent the occurrence of gray mold black spot to fundamentally improve the immunity of grapes, it is necessary to supplement various organic fertilizers, in addition to using Bika potassium dihydrogen phosphate with some high-efficiency insecticides and sprays, which can not only kill the bacteria but also improve the immunity of grapes.

Prevention and control methods. First, the ventilation should be good.

The main growing season of the grapes is in the summer, when temperatures are high. If the density of the grapes is too high, the temperature will be too high, and the temperature combined with poor ventilation will directly cause the leaves of the grapes to turn yellow or even die.

2. Ensure moisture**.

The grapes are very susceptible to waterlogging and slightly drought tolerant. If the leaves dry and then slowly wilt, this is most likely due to lack of water or waterlogging. Therefore, it is necessary to ensure the moisture of the grapes**, but also to ensure that the drainage of the grapes is convenient and timely.

3. Reasonable fertilization.

If your grape leaves are yellow and the veins are still green, with only yellowing between the veins, then this is an iron or magnesium deficiency. However, because there are many varieties of trace elements, it is impossible to distinguish them one by one, and it is recommended to apply compound fertilizer at this time.

If you have downy mildew, spray it with 1,500 times of ethylphosphine aluminum (special drug).

It means that he is about to start to ripen, and the leaves are dry and falling, which is either caused by lack of water, or is ripe, and the temperature is too low.

The black edge and eventual drying of grape leaves can be caused by grape brown spot, also known as brown spot, leaf spot and corner spot. There are two types of brown spot disease, large brown spot disease and small brown spot disease, which mainly damage the middle and lower lobes. Brown spot disease with a diameter of 3-10 mm is large brown spot disease, and its symptoms vary depending on the breed.

The lesions are very small, 2-3 mm in diameter small brown spots, the size is the same, the leaves are small brown spots, the color in the middle is slightly lighter, when wet, the back gray mold layer produced by the lesions, and in severe cases, there are dozens to hundreds of lesion leaves, causing the leaves to wilt yellow and fall off. Sometimes brown spot disease occurs on the same leaf at the same time, accelerating the wilting, yellowing and shedding of the diseased leaves.

Methods of cultivating vines.

In addition to applying basal fertilizer to the vines, fertilization can be topdressed three times a year; The pre-flowering fertilizer was mainly cake fertilizer; At the fruiting stage, phosphorus, potassium fertilizer and cake fertilizer should be the main fertilizer. In July, cake fertilizer is applied again to promote the second fruiting; August is the fruit coloring period, and you can apply more potassium dihydrogen phosphate fertilizer to Trim phosphate. When fertilizing, the soil must be loosened first, then fertilized, and then watered.

Watering grapes during the growing period, need sufficient light and maintain a good ventilation environment, water supply should be sufficient, spring and autumn can be watered once a day, summer can be watered once in the morning and afternoon (water should be used after the sun, avoid using cold water). During the rainy season, stagnant water should be drained in a timely manner.

Temperature, light.

Grapes prefer sunny, hot and dry climates, so plenty of light and good ventilation are a must. In winter, it should not be lower than -5 degrees, and the north should be buried underground or moved indoors.