The grapes start to ripen at the end of August, what is the reason for the dry and falling leaves, a

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).

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.

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.

Summary. 1. If the leaves of the whole garden are yellowed quickly, it is likely to be a pesticide damage; (Because of the lack of nutrients or diseases, it is unlikely that the whole garden will break out soon).

2. If it is sporadic and some plant leaves are yellowing and there is a process, it may be a deficiency of nutrients, root disease or leaf disease;

3. If the yellowed leaves have green veins, but the veins are yellow, it may be iron deficiency or magnesium deficiency. We can continue to subdivide, if the old leaves are yellow, the new leaves are not yellow, they can be identified as magnesium deficiency, if the old leaves are not yellow, the new leaves are yellow, they can be identified as iron deficiency;

4. If the veins of the yellowed leaves are yellow and the veins are green, then it can be identified as a viral disease;

5. If there are yellow spots on the yellowed leaves, and the yellow spots are slowly necrotic, it can be identified as a fungal disease of the leaves;

6. If the yellowed leaves first dry up from the edge of the leaves, but the leaf veins and leaf veins are still normal, then it can be identified as root damage or fertilizer damage;

What are the prevention and control measures for yellowing of grape leaves?

1. Yellowing of leaves caused by pesticide damage.

The yellowing of the leaves caused by the pesticide damage is generally manifested in 3-5 days after the spraying, and the location of the pesticide damage is not the old leaves, nor the new leaves, but the middle leaves, and it is the yellowing of the whole garden.

What to do if the grapes are ripe and the new leaves are burned in the middle of the year.

1. If the leaves of the whole garden are yellowed quickly, it is likely to be a pesticide damage; (Because the lack of nutrients or diseases is unlikely to break out in the whole garden soon) 2. If it is sporadic and some of the leaves of the plants are yellowing and there is a process, it may be a deficiency of nutrients, root diseases or leaf diseases; 3. If the yellowed leaves have green veins, but the veins are yellow, it may be iron deficiency or magnesium deficiency. We can continue to subdivide, if the old leaves are yellow, the new leaves are not yellow, can be identified as magnesium deficiency, if the old leaves are not yellow, the new leaves are yellow, can be identified as iron deficiency; 4. If the veins of the yellowed leaves are yellow and the veins are green, then it can be identified as a viral disease; 5. If there are yellow spots on the yellowed leaves, and the yellow spots are slowly necrotic, it can be identified as a fungal disease of the leaves; 6. If the yellowed leaves first dry up from the edge of the leaves, but the leaf veins and leaf veins are still normal, then they can be identified as root damage or fertilizer damage; What are the prevention and control measures for yellowing of grape leaves1, the yellowing of leaves caused by pesticide damage and the yellowing of leaves caused by pesticide damage generally manifest itself 3-5 days after spraying, and the location of pesticide damage is not old leaves, nor new leaves, but middle leaves, and yellowing of the whole garden.

Increase the amount of watering.

Do not fertilize in the near future.

Summary. Hello, there can be a variety of reasons for the dry leaves of grapes, here are a few possible reasons:1

Dehydration: If the grape leaves don't have enough moisture, they can become dry. Make sure the soil is kept moist and irrigate the plants if needed.

2.Pests and diseases: Grapes can be attacked by a variety of germs and pests.

These pests and germs can cause the leaves to wilt, turn yellow, or turn brown. If you find these problems, you need to take timely measures to control and ** the disease. 3.

Over-fertilization: Too much fertilizer can cause the grape leaves to burn, which can dry them out. Make sure to add fertilizer according to the instructions on the fertilizer package and avoid overuse.

Hello, there can be a variety of reasons for the dry leaves of grapes, here are a few possible reasons:1Water shortage:

If the grape leaves don't have enough moisture, they will dry out. Make sure the soil is moist and irrigate the plants when needed. 2.

Pests and diseases: Grapes can be attacked by a variety of germs and pests. These pests and germs can cause the leaves to wilt, turn yellow or brown.

If you find these problems, you need to take timely measures to control and ** the disease. 3.Over-fertilization:

Too much fertilizer can cause the grape leaves to burn, which can dry them out. Make sure to add fertilizer according to the instructions on the fertilizer package and avoid over-agitation.

In general, there are many reasons for the drying up of grape leaves, and in the actual planting process, we must strengthen the daily management work, especially the nutritional elements to ensure comprehensiveness, if there are symptoms of deficiency, it will affect the growth of the grape vine world, the plant will weaken, and the yield will be reduced. In addition, it is necessary to identify the causes of leaf dryness and take active prevention and control measures.

How to send **.

On the Q&A screen, enter the fourth option below. Tap on the one option next to the camera. You can send **.

I didn't find the option to send a picture.

There are five options under the input interface, and the fourth is send**.

The semi-starvation state of large trees or fruit trees, the lack of fertilizer and water or single fertilization of unhung fruit trees and small trees may cause the tree to weaken and the leaves to fall early leaves, thereby greatly enhancing the probability of leaf susceptibility, so it is necessary to strengthen fertilizer and water management and strengthen the leaves, which is the focus of the leaf protection work.

It is understandable to cause overall or local injury to some virtual trees, intercepting the flow and promoting flowering, but for some overloaded trees and stable trees, especially weak or weakened trees, blindly taking injury surgery regardless of tree potential may cause early defoliation of potential loss and decline.

Wind can not only provide warmth and cool for the survival of leaves, but also transfer moisture and drain water for leaf growth, and light is not only a participant in leaf photosynthesis, but also a light energy bearer of assimilation. Once blocked, especially in sunlight, it is imperative that the resistance of the leaves is weakened, and the leaves often become the victims or victims of leaf diseases, and pruning is carried out to increase the air permeability.

Causes and solutions for yellowing of the leaves of the vine.

1. Improper watering.

Potted vines require a lot of water, and too much or too little water can have a big 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 potted vines can cause new leaves to turn pale and yellowish in color, and old leaves to become malnourished. 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 potted vines, we should pay attention to thin fertilizer and frequent application. 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, the vines should be fertilized about once every four days, and when their roots are firmly established, the use of urea and potassium dihydrogen phosphate should be increased appropriately, and a thin fertilizer should be applied once every three days.

3. Insufficient light.

Potted vines like light, and potted vines that have been planted indoors for a long time will not be able to photosynthesize normally due to the lack of light, so the leaves will turn yellow and fall off one after another, and the new leaves will be thin 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 growth.

4. 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 potted vines turn yellow, but they don't know that light can also have a huge impact on grape fruits.

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 diseases that can cause yellowing of leaves, such as anthracnose, white rot, downy mildew, white rot and black rot.

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 spray 200 times the amount of Bordeaux liquid, 600 times the mancozeb or 800 times the solution of DuPont Fuxing to kill the 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.

Web Links.

Is it a lack of water? Then pay attention to watering.

It's autumn now, and my vines have a lot of yellow and fallen leaves, which is not a disease, but a seasonal cause.