Why do tree grapes lose their leaves? The leaves of my vines are withered, I don t know why?

It could be due to the following reasons:

1. Sun burns.

2. Watering the roots for more than 24 hours and rotting the roots.

3. Deficiency of nutrients. Symptoms of iron deficiency. Iron is very mobile in the fruit tree, and the iron in the old leaves cannot be transferred to the new tissues, so it cannot be reused.

Therefore, when iron is deficient, the lower leaves tend to remain green, while the young leaves show chloropathy until they dry out. Iron deficiency correction methods:

1) Apply organic fertilizer in autumn (around August 20), apply ferrous sulfate directly to each soil at the same time as applying basal fertilizer in autumn.

kg, mixed with 20 kg of animal manure. Iron deficiency in fruit trees is not entirely due to insufficient iron levels in the soil. Poor soil structure also limits the uptake and utilization of iron by the roots. Therefore, in the treatment of iron deficiency, it is necessary to increase the application of organic fertilizer to improve the soil to improve the availability of iron in the soil.

2) Foliar spraying of ferrous sulfate aqueous solution or chelated iron (ferric citrate) aqueous solution, sprayed once every half month, a total of 3 4 times, the effect is better.

Tree grapes shed their leaves. It may be caused by the fact that the weather is too hot, the temperature is too high, the evaporation is very strong, the land is severely drought, or it may be caused by some kind of pest or disease. For example, there are toothworms, cabbage worms and so on.

Of course, it also has something to do with the season, for example, there will be normal leaf loss at the beginning of winter.

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.

Hello, yellowing of grape leaves, leaflets are likely to be caused by nitrogen deficiency.

When the grape is deficient in nitrogen, the leaves lose green and yellow, and the leaves are small and thin; The new shoots grow slowly, the branches are thin and the internodes are short; The ears are loose and unevenly ripe, and the yield is reduced.

Remedial measures: If nitrogen deficiency is found, apply an appropriate amount of nitrogen fertilizer to the roots in time, and you can use Fuwoshi high-nitrogen water-soluble fertilizer, which has high absorption rate, quick effect and easy absorption.

Management of the vines.

The vine should be planted in sandy soil during the growth period, and it is best to plant it in the ground, it likes the sun, and the cultivation location should have good sunlight, and avoid planting in places with poor light conditions. During the seedling period, it is necessary to set up a frame to facilitate later management, and timely topping, when the plant height is 20cm, retain 2-3 branches, and the others should be cut off. Weak branches and fine branches should also be pruned appropriately to avoid excessive nutrient consumption and affect fruit growth.

Methods of managing vines.

Land selection: The vine is still relatively adaptable to the soil, and can grow in most soils, but in order to ensure its fruiting rate and quality of fruiting, it is best to choose sandy soil for planting, and the soil drainage should be good, otherwise a large amount of water will accumulate in the rainy season, which is not conducive to the growth of the root system. It is best to plant vines in the ground, because they have a well-developed root system, and if they are planted in pots, they will limit the growth of the root system and affect the growth of the vines.

Light: The vine likes a sunny growing environment, and needs to choose a location with a long light time when planting, especially in its flowering and fruiting period, if the light conditions are poor, it will affect the differentiation and opening of flower buds, and the success rate of pollination will also have a certain impact, and the coloring and sweetness of the fruit will be better in a sunny environment.

Grape trellis: grape vine branches have a certain toughness, but the hardness is not very high, so from its seedling time to it to build a shelf, and its branches tied to the shelf, its branches will grow around the shelf, can play a good supporting role, otherwise it will crush the branches after it bears fruit, and there is a certain difficulty in later management.

The new leaves of the grapes rotted from the sides and got white rotThe disease is mainly harmful to the fruit spike and branch tip, the leaf can also be damaged, usually the disease occurs on the branch tip first, the lesion occurs at the wound site, it begins to be water-soaked light reddish-brown with dark brown edges, and then develops into a long strip of black-brown, and the surface is densely populated with small gray-white grain spots.

Extended Resources:1. Growth habits

Temperature. The minimum temperature required for grape growth is about 12 to 15, the minimum ground temperature is about 10 -13, the optimal temperature for flowering is about 20 for rotation and about 20 -30 for fruit expansion. If there is a large temperature difference between day and night, the coloring and sugar content are good.

The grapes bud in the spring. If the temperature rises rapidly, it is easy to cause branches to grow, which is manifested as insufficient node length and poor fertilization during flowering. In case of cold spring, pay attention to apply more phosphorus fertilizer and high-carbon organic matter, and minimize nitrogen fertilizer.

Illumination. Grapes must have a certain intensity of light during normal growth, but when the light is too strong, especially when the grapes enter the hard core period, birthday burns are prone to occur. In this case, bagging or leaf planting can be used to preserve as much as possible the leaves that can cover the grape fruit.

When the sunshine is insufficient, the flowering period is easy to cause poor corolla shedding and low fertilization rate; Flower bud differentiation stage, poor flower bud differentiation, mostly unisexual fruits; The plants are longer and have longer internodes during the growing period. no fruit or single fruit; fruit disease and poor quality in the swelling stage; The color is not good at the ripening stage, and the sugar content decreases.

Moisture content. Grapes have a high demand for moisture. Strict control of moisture in the soil is a prerequisite for growing good grapes.

Grapes need more water at the beginning of growth or during the vegetative growth phase. In the late growth or fruiting stage, the root system is weaker and requires less water. It is necessary to avoid damaging the roots and affecting the quality.

Avoid rain and dew. Rainy years tend to cause insufficient sunshine and limited photosynthesis. Excessive water absorption can easily cause excessive growth of branches, and excessive humidity can easily cause various diseases, such as black pox, gray mold, etc.

2. The efficacy and function of grapes

Beauty and skin care. Grapes are rich in anthocyanins and catechins, which are super antioxidants. They can reduce the harm of free radicals, make them more elastic, prevent wrinkles, and achieve the effect of beauty and skin care.

Strengthen the spleen and stomach. Grapes are rich in tartaric acid, a digestive nutrient. Therefore, it is suitable for people with weak gastrointestinal function, it can effectively reduce the burden of gastrointestinal digestion and strengthen the spleen and stomach.

Helps with sleep and dreaming.

Melatonin, which is abundant in grapes, is a very important sleep aid. Insomnia occurs in older people due to the fact that the amount of melatonin in the body decreases as they age. Therefore, for some people with insomnia, Lajin Wei can eat some grapes at night to help them fall asleep and have a good dream.

The new leaves of the grapes are blooming from the edges, and they are rotten, and they guess that this is a fungal infection, which is anthracnose, and it can be sprayed with carbendazim or chlorothalonil.

It depends on whether it's rotten or dry. If it's rotten, it's because the air around you is too humid, or it's raining.

Hello dear <>

Physiological dead leaves and heat damage to dead leaves: the affected parts are dry and dehydrated, but the leaf veins do not obviously lose their dust green. It is mostly caused by the sunny weather after the rain and the temperature is too high; If it is cultivated in a facility, it may also be caused by the dripping of hot water from the greenhouse film.

Potassium deficiency dead leaves: leaf margins become dry, rolled up or down, mesophyll twisted and uneven surface. Magnesium deficiency dead leaves:

The leaf veins fade green, and the posterior leaf veins develop into yellow spots, which mostly expand from the inside of the leaf to the leaf margin, causing the leaf yellowing and scorching. Fertilizer damage to dead leaves: the edge of the leaves is yellow and dry at the beginning, and the whole leaves are yellow in severe cases, and even dead trees.

I wish you a happy life! Hope mine is helpful to you ha.

1. Clear the garden in the first half of the bud. Objective: To clear the garden in the first half of the bud, reduce the number of pathogenic bacteria, promote the leaves, enhance photosynthesis, produce more organic matter and robust trees.

2. Topping before flowering. Topping 3-5 days before flowering to control vegetative growth and promote reproductive growth. Pay attention to timely spraying of wofonsu foliar fertilizer to supplement nutrition.

3. Fertilize before and after flowering. Before flowering, dilute with boric acid solution with 80 lukewarm water. Zinc fertilizer is supplemented after flowering and diluted with cool water to improve the fruit setting rate.

4. Seize the key opportunity to prevent and control diseases. 5 days before flowering and 5 days after flowering, the whole garden spraying with Liangguoan 300 times + Wofeng 600 times + organic silicon 3000 times can prevent gray mold, downy mildew, etc.

5. Pinch your head. When the grapes grow to about 10 leaves, it is best to use bamboo poles or other wooden tools to start the head, and do not use metal tools, otherwise it is easy to oxidize and cause the invasion of germs, increasing the chance of disease.

Hello, according to the information you provided, I have found some relevant information for you, it may be that the rainy season is concentrated in the spring and summer and its time is long, suddenly turned into a high temperature climate, the ecological environment of the root collapse is not adaptable, resulting in transpiration and water absorption imbalance and caused. Control methods: improve the root growth environment, increase the application of organic matter fertilizer, plastic film covering, cultivate excellent tree phase, spray protective agents, and properly control the yield.