The grapes are not ripe yet, and the branches seem to be ripe, what is the disease with patches?

Is it grape cob brown blight, is it not watered recently much, to water in time, grape growth period can not lack water.

Top dressing: Top dressing is selectively fertilized according to the different phenological stages of the grapes. It can be divided into germination fertilizer, flowering fertilizer, fruit strengthening fertilizer and ripening fertilizer. The exact amount of fertilization should be based on the yield requirements of the tree and the fertility of the local soil.

Germination fertilizer: about February to apply a germination fertilizer, germination fertilizer is mainly nitrogen fertilizer, can use Yanwo water-soluble fertilizer nitrogen fertilizer, using furrow application or hole application.

Pre-flower: In late April, apply a pre-flower. Pre-flowering fertilizer, mainly nitrogen fertilizer and phosphorus fertilizer, with Yanwo water-soluble fertilizer high nitrogen and high phosphorus type, need to be watered immediately after fertilization.

Fruit-strengthening fertilizer: Yanwo potassium fertilizer can be used, and furrow application or hole application is still used.

The growth period of young fruits is the peak fertilizer demand of grapes in a year, and fertilization at this time not only promotes the growth of young fruits, but also has a good effect on the growth of branches and leaves of the year.

Coloring fertilizer: also known as ripening fertilizer.

Post-harvest fertilizer: After the fruit is harvested, due to the large nutrient consumption of the tree, fertilization is required to ease the tree and delay defoliation.

In recent years, with the improvement of grape fertilizer and water management technology, irrigation fertilization has been gradually adopted to replace traditional fertilization methods in production.

Top dressing begins in mid to late April, and fertilization is carried out using drip irrigation. 2kg of water-soluble compound fertilizer with nitrogen, phosphorus and potassium content of 15:15:15 can be applied per mu, which can be used at the same time as water-soluble fertilizer and water fertilizer, once a week, during which the soil is kept moist.

Before the grapes were ripe, the branches were as if they were ripe, and they were suffering from anthrax.

This symptom is white rot, which is prone to white rot after rain due to the recent hot weather. The symptoms are from the lower part of the ear to the upper part, the pathogen is generally in the soil, and after heavy rain, the rain splashes up and splashes on the ear and begins to develop the disease, and the closer to the ground, the more severe the disease.

In the case of medicines: Ami Miaoshu (325 g of benzostrobin SC), Lunassen (fluopyramide, oximetrobin), and even prochloraz and pyraclostrobin have certain control effects.

Summary. Answer: Dear, hello caused by the following reasons:

1 Grape Black Rot: This is a common grape disease that causes the base of new grape shoots to turn black and fall off. This disease is mainly caused by mold infections, which multiply in humid environments.

Methods of prevention and control of this disease include: regular spraying of fungicides during plant growth, keeping the surroundings of the plant dry, and timely removal of fallen and diseased leaves. 2. Nutritional deficiencies:

If the vine is deficient in nutrients, it is not uncommon for the base of the new branch to turn black and fall off. To avoid this, the right amount of fertilizer can be given during the growth of the plant, such as organic fertilizer, potassium dihydrogen phosphate, etc.

Answer: Dear, hello caused by the following reasons: 1 Grape black rot:

This is a common grape disease that causes the base of the new shoots to turn black and fall off. This disease is mainly caused by mold infections, which multiply in humid environments. Methods of prevention and control of this disease include:

During the growth of the plant, spray Kai Osmetic Fungicide regularly, keep the surrounding area of the plant dry, and remove fallen and diseased leaves in time. 2. Nutritional deficiencies: If the grape plant lacks nutrients, it is also common for the base of the new branch to turn black and fall off.

To avoid this, the right amount of fertilizer can be given during the growth of the plant, such as organic fertilizer, potassium dihydrogen phosphate, etc.

Give you a remedy.

A: Dear, you can take the following measures to remedy: 1. Remove the infected part of the slag:

If it is due to grape black rot, the infected part can be removed and the remaining part can be sprayed with fungicide. 2. Supplemental nutrients: If it is caused by insufficient nutrients, an appropriate amount of fertilizer can be given during the growth of the plant, such as organic fertilizer, potassium dihydrogen phosphate, etc.

3. Strengthen lead field management: Strengthen the management of plants, keep the surroundings of plants dry, and remove fallen leaves and diseased leaves in time, which can reduce the reproduction and spread of mold. 4. Disease prevention:

Regular spraying of fungicides and timely detection and treatment of infected plants can prevent the occurrence of grape black rot and other diseases.

This is color disease, also called water jar disease, grapes bear more fruit, large load, more rain, but the leaf area is small, the light is not good, the nutrients can not be supplied, this situation will occur, the best way is to thin the fruit, the fruit development period fertilizer and water to keep up, keep ventilation and light.

Yes, grape yellow spot disease is also known as grape yellow spot disease. It manifests itself in areas where the climatic conditions are suitable, and the symptoms are mostly severe in late summer. There are 2-3 leaves on each branch, and up to 20 leaves appear yellow spots, mainly distributed near the main vein and lateral veins, irregular shape, unequal size, scattered or aggregated into irregular patches, the color is pale yellow-green at first, then turns chrome yellow, and the leaves turn white when aging, and the symptoms are different depending on the grape variety, age, and environmental conditions.

The symptoms are obvious in young trees, and milder in old trees. Symptoms can also be exacerbated by a combination of multiple viruses.

This small black grain is called grape rust and is a fungal disease. Pesticide rust can be used for control.

According to the first point of view, considering the harm of brown spot disease, 10% difenoconazole 750 1000 times liquid 70% dysenlian 300 700 times liquid 50% hexaconazole 800 1000 times liquid 75% oxoxystrobin tebuconazole 4000 6000 times liquid 25% fluconazole 4000 5000 times liquid 12·5% fluconazole 40 50 ml per mu alternately used, plus amino acid foliar fertilizer control.

1. Harmful symptoms.

According to the size of the lesions and the different pathogens, they are divided into two types: large brown spot disease and small brown spot disease. Mainly harms the leaves.

Second, the incidence of the disease.

High humidity and high temperature are required for conidia germination and mycelium development in the host, so the disease occurs seriously under high humidity and high temperature conditions. Brown spot disease generally occurs at the beginning of the month, and the peak of the disease is from July to September. Severe incidence is higher in rainy years.

When the disease is severe, the leaves can fall off 1 to 2 months earlier, which seriously affects the tree strength and the results of the second year.

3. Prevention and control methods.

After autumn, the fallen leaves of the orchard are thoroughly swept and burned or buried deep to eliminate the source of overwintering fungi. Strengthen the cultivation and management of grapes, pay attention to orchard drainage, and appropriately increase the application of Fateh series water-soluble fertilizers to promote extreme growth and robustness, so as to improve disease resistance.

Soil compaction and salinization are serious, and the pH value of soil can be adjusted with Trim microbial agent to improve soil microbial activity.

1. Seedling management.

Generally, grape field management is carried out after the grape seedlings are planted, and the main purpose after planting is to improve the survival rate of grapes and promote the growth rate of seedlings. When the grape seedlings are planted, if there is no rainfall, then we need to water the grapes according to the drought of the weather to promote the growth of new roots. Secondly, according to the growth of grape seedlings, reasonable topdressing fertilizer to promote the growth of seedlings, especially when the leaves of seedlings appear yellow, more should be topdressed, supplemental nutrition.

The topdressing at the seedling stage is mainly carried out in accordance with the principle of diligent application of thin fertilizer, and at the same time, nitrogen fertilizer is the main fertilizer, with the use of organic fertilizer. Finally, it is necessary to weed in time, generally based on shallow tillage, to avoid hurting the root system of the plant, and at the same time to prune reasonably.

2. Growth period management.

The growth period of grapes is naturally to promote the growth of grape seedlings, so that they can quickly enter the flowering and fruiting period, and shorten their growth cycle. During this time, we mainly take fertilization as the main management technology, and at the same time fertilization is mainly nitrogen fertilizer, at this time, it needs to be combined with the use of phosphorus and potassium fertilizer, if the soil is deficient in calcium or other trace elements, it is also necessary to reasonably supplement the micro-fertilizer. Another very important thing at this stage is to build a scaffold, pull the grape seedlings to the scaffold, and climb the growth, which can improve the permeability of the field, and at the same time carry out reasonable topping to promote the growth of side branches.

Finally, according to the water demand, reasonable watering, and combined with cultivation, can promote the absorption of nutrients.

3. Management of the fruiting period.

The management of the fruiting period generally needs to be carried out in several steps, and it cannot be achieved overnight. First of all, in the spring bud stage, we need to fertilize once, mainly nitrogen fertilizer, combined with phosphorus and potassium fertilizer, to promote the growth and budding of the vines. The second is to wait until the grape seedlings bloom, carry out a top dressing, mainly phosphorus and potassium fertilizer, the purpose is to protect the flowers and fruits.

Of course, at this time, we also need to carry out reasonable flower and fruit thinning, which is also to improve the yield and quality of grapes and reduce physiological fruit drop. Finally, when the grapes grow to the size of soybeans, it is necessary to apply strong fruit fertilizer, mainly trime foliar fertilizer.

4. Post-harvest management.

After the grapes are harvested, we clean and disinfect the fields to reduce the damage caused by pests and diseases, as well as to reduce some of the pathogens at the root. At this stage, we can also prune the vines appropriately, such as old branches, dead branches, diseased branches, etc. Finally, after the vineyard is cleared, fertiliser, mainly compost, in order to prepare the grapes for the winter and the next year's high yields.

If you have downy mildew, the young fruit is very susceptible to disease, the diseased young fruit turns gray, the surface of the fruit and the fruit stalk is densely covered with white mold, and the larger fruit is infected inside.

Brown lesions are formed, growth is stunted and uneven development, and it is easy to form cracked fruits when it rains in the near maturity stage.

Prevention and control methods: Thoroughly remove fallen leaves, prune carefully, cut off tendrils, diseased branches, diseased fruit ears, and remove them outside the facility or bury them deeply to reduce pathogens.

The non-drip antifogging film is selected as the outer covering material of the facility, and the whole area of the facility is covered with plastic film to reduce the air humidity and prevent the mist from growing, and inhibit the formation and germination of sporangia and the germination and infection of zoospores.

Adjust the temperature and humidity in the room, especially after grape fruit set, the room temperature should be quickly raised to more than 30 during the day, and try to maintain it at 32-35, and inhibit the formation and germination of sporangia and spore germination infection with high temperature and low humidity. At about 16 o'clock in the afternoon, the air outlet was opened for ventilation and humidification, reducing the indoor humidity, maintaining the night temperature at 10-15, and the air humidity was not higher than 85%, and the germination of sporangia and spores was inhibited with lower temperature and humidity to control the occurrence of diseases. .

Ear bagging to eliminate the infection of pathogens on the ear.