What are the common diseases of grapes? What are the main diseases of grapes?

Grape powdery mildew:Grape powdery mildew produces conidia when the conditions are suitable in spring, and the wind spreads, and after germination, it directly invades the host and infects the disease. The windy sand in Xinjiang is relatively large, which is conducive to the spread of powdery mildew.

Grape downy mildew:Extensive management, canopy of the shelf, poor ventilation and light transmission conditions, partial application of nitrogen fertilizer, long branches and leaves, and weak trees are all prone to downy mildew.

Grape virus diseaseAt the same time, there are many kinds of cotton or weeds such as reeds, weeds, and willows around the vineyards, which will breed many flying insects, and the flying insects carry viruses to infect.

Yellowing of grapes:The soil in Northwest China is mostly saline-alkali in nature, the climate is more severe in spring cold, and the management is more extensive, which causes the grape growth to be under heavy adversity, the root system can not be released, the growth is not good, the growth potential is widespread, and the fertilization is biased to apply nitrogen fertilizer, which leads to the widespread occurrence of yellowing. To solve yellowing, users are generally spraying iron, zinc and other foliar fertilizers, which may be able to see the effect within a few days, and will be repeated after a few days, and will also cause a yellow and green leaf surface, spots and spots, affecting photosynthesis, treating the symptoms but not the root cause, and the main cause of yellowing is soil problems, such as long-term use of chemical fertilizers, especially partial nitrogen fertilizer, resulting in soil acid-base imbalance, compaction, salinization, etc., so that the rhizosphere environment deteriorates, elements are antagonistic to each other (medium and trace elements are solidified), and the root system can not absorb it. As a result, the yellowing phenomenon is serious.

**Scheme:

Grape powdery mildew, downy mildew:Liangguoan 150-300 times + garlic oil 1000-1500 times + wofeng 600 times spray, 3-5 days apart, use 2-3 times. If the disease is severe, it can be used together with chemical drugs.

Grape virus diseaseGarlic oil can be sprayed regularly during the grape growing cycle to prevent the occurrence of viral diseases by using the mechanism of garlic oil to ward off pests. When sick, use 40g of Olik-fruit tree special virus mixed with 30 kg of water to irrigate roots or spray.

Yellowing of grapes:: To solve the yellowing problem, spray combined with root irrigation effect is more effective. Spray with Liangguoan 150-300 times + 600 times of wofengsu, irrigation of roots with 300-500 times of Liwang + 100-300 times of R. solanacearum + 600 times of wofengsu.

Although adjusting the soil and improving the rhizosphere environment is the root cause, it is necessary to spray the leaves to quickly turn green, and after turning green, they can produce nutrients through photosynthesis to nourish the roots and raise the trees. If the yellowing cannot be solved quickly, the leaf color cannot be quickly turned, and the photosynthesis will not be able to provide nutrients, and the roots will be starved to death, eventually causing a dead tree.

There are some common pests and diseases in grapes.

When downy mildew is severe, the grape leaves will appear in small spots and gradually spread, and in severe cases, the leaves will gradually wilt.

Powdery mildew appears in the early stages of the grape with pale white spots on the pages, powdery white leaves, and the fruit stops growing or shrinks.

Black bean disease and its susceptibility to destructive conditions can cause the grapes to stop growing and shrink.

The two-star leafhopper likes to parasitize the back of grape leaves, and after the larvae grow, the branch juice is continuously pumped away, and the grape leaves wither and fall off because of the loss of nutrients.

There are still many pests and diseases in grapes. Common diseases are: grape black pox, gray mold, downy mildew, white rot, powdery mildew, anthracnose, brown spot, root cancer, acid rot and grape physiological diseases.

Common pests and diseases of grapes include the following grape black pox, grape anthracnose, grape white rot, and grape downy mildew.

For example, grape black pox, grape downy mildew, grape white rot, grape powdery mildew and grape anthracnose, we can treat it according to the type of disease.

Dear, hello, I am glad to answer for you, the common diseases on grape vines are mainly grape downy mildew, grape white rot, grape anthracnose, grape black pox, grape black rot, grape brown spot disease, grape coal stain, grape house blight, grape cob brown blight, grape powdery mildew, grape leaf bacterial wilt, grape canker, grape sunburn, grape vine blight, grape veraison. Hope mine helps you!

Grape pests and diseases are:

1 Grape black pox.

Grape black pox disease has symptoms throughout the plant, such as black spots on inflorescences, fruits, stems, etc.

2 Grape downy mildew.

Grape downy mildew is an advanced disease, which generally produces a layer of gray-white moldy material on the back of the leaves, and the front of the leaves has polygonal lesions, which expand in severe cases, causing the leaves to dry up and fall off.

3 Grape white rot.

Grape white rot mainly damages fruit ears and shoots, but also damages leaves. After the fruit panicle is infected, light brown water-stained lesions are now produced on the fruit stalk or cob, and then gradually spread to the fruit grains, forming stiff fruits. The leaf disease is mostly at the tip or edge of the leaf, which first forms water-stained lesions, and then gradually expands into concentric wheel lesions.

4 Grape powdery mildew.

Grape powdery mildew can damage grape leaves, fruits, shoots and tendrils. The affected area first produces small white spots, which are covered with white powder, and the lesions gradually expand in the later stage, and finally cause the affected area to shrink and fall off.

There are many kinds of grape diseases, among which there are more than 10 kinds of serious damage, such as downy mildew, white rot, black pox, anthracnose, brown spot, powdery mildew, vine blight, root cancer, cob brown blight, gray mold, fan leaf virus disease, house blight, black rot, etc.

Grape downy mildew:

Grape downy mildew is distributed in grape producing areas in China, and the disease is serious in areas and years with more rain in spring and summer, which is one of the important diseases of grapes. In the year when the disease is prevalent, the diseased leaves are scorched and early falling, the diseased shoots are twisted and deformed, and the development is stunted, which has a great impact on the tree potential and yield.

Answer hello, dear friends [happy] [happy] grape main leaf diseases, 1, anthracnose grape anthracnose mostly occurs on the pulp of grapes, first from the branches and leaves close to the grapes began to slowly erode to the whole plant, the disease is manifested as small black spots, at this time we can use 80% anthrax Fumei solution to spray the foliage, every 10 15 days can be sprayed. 2. White rot is one of the most serious white rot will make the grapes become stiff fruits, which will occur on the fruit stalk or fruit in the early stage, which will produce light brown lesions, and sometimes erode the leaf tip, we can use Tobuzin or 75% chlorothalonil solution to prevent and control white rot. 3. Black pox grape black pox is one of the most common diseases of grapes, mostly manifested as black spots on the whole grape fruit, flower diameter, branches and leaves, etc., and the occurrence of black pox in the early stage of grape growth will cause grapes to stop growing.

4. Downy mildew grape downy mildew mostly occurs in the later stage of grape growth, which is manifested as a layer of gray-white moldy substance on the back of the leaves, which will slowly expand the scope of the disease and eventually cause the leaves to wither and fall, we can use 40% ethyl phosphorus aluminum liquid to spray the leaf surface, which can play an effective protective effect. --Big Red Flower] [Big Red Flower] I hope my answer can help you. I wish you a happy life, people and all the best [Ollie give] [Ollie give].

Big Red Flower] dear Da no answer has been sent to you! If you think I'm happy with my answer! [Agree] dear, click on the evaluation on the right, give me a like, thank you very much!

Ask: What is this disease, or was it bitten by an insect?

Ask the question, you're sure.

Ask how to treat white rot.

Answer hello, white rot ** method (1) pollution-free control, in the early stage of plant infection, drug intervention should be used, spraying fungicidal drugs every 5 7 days, pay attention to dilution of the drug, and the severity of the disease determines the number of spraying. When the condition is more serious, it is necessary to spray the plants according to the ratio of 15 mg of garlic oil mixed with 15 kg of water per 30 catties of water, and the frequency is once every 3 days, and it can be sprayed two or three times in a row. (2) For orchards with severe illness, disinfect the soil before the outbreak of the disease.

Mix 50% Fumei double powder with 1:1 sulfur powder and calcium carbonate and sprinkle on the orchard soil. (3) During the growth period, it is necessary to use drugs in time to prevent and control, and to spray protective agents before and after the flowering period

200 of Bordeaux liquid for spraying. And it should be noted that spraying should be started one week before the high incidence of the disease, which can greatly reduce the rate of grape infection after the application. After that, the drug should be administered according to the degree of illness and weather, 7 to 15 days.

In the early stage of the disease to start spraying, generally start in mid-June, 7 10 days spray once, spray 3 5 times, stop using half a month before the fruit picking, but also pay attention to the heavy rain after the spray.

The main diseases of grapes are and the prevention and control are:

1. Grape anthracnose

Control measures: Completely remove diseased ears, diseased vines and diseased leaves to reduce the source of bacteria. In areas south of the Yangtze River, it can be bagged immediately after flowering. Strengthen cultivation management, timely rectification, tying vines, topping, stuffy socks to ventilate the shelf surface. Increase the application of phosphorus and potassium fertilizers and control the amount of nitrogen fertilizers.

2. Grape white rot

Control measures: Completely remove diseased branches, panicles and leaves. Pruning in time, raising the fruiting part, weeding in time, and paying attention to drainage. For long-growing plants, it is strictly forbidden to apply nitrogen fertilizer before flowering.

3. Grape downy mildew

Control measures: remove fallen leaves, bury or burn diseased branches. Timely topping, pruning, drainage and weeding, and increase the application of phosphorus and potassium fertilizers. Spraying should be started at the beginning of the disease. In the north, spraying is usually done every 15 days from early to mid-June.

Nutrition of grapes:

Grapes are similar to most crops in that they need about 17 nutrients to grow: carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, zinc, copper, boron, molybdenum, chlorine, cobalt.

With the exception of nitrogen, most of the remaining elements are absorbed from the soil by the roots, and the proportional relationship is as follows: 94% of the fresh tissue of crops is composed of carbon, hydrogen, and oxygen from air and water, and only nutrients from the soil.

The above content reference:

Encyclopedia — Grapes.

Encyclopedia - Grape pest control technology.

There are 18 common grape diseases, such as; Grape gray mold, inflorescence susceptibility, fruit stalk susceptibility, new shoot and leaf susceptibility, near-ripe fruit susceptibility, ripe fruit susceptibility, grape downy mildew and so on. If you want to learn the knowledge of grape diseases, it is recommended to choose Tiantian Agriculture, which has strong teachers and planting experts; The content is comprehensive, and the key points of planting technology are fully covered; It can be learned through mobile phones, at any time**, repeatedly**; Teachers are fully serviced, and agricultural technology teachers answer questions one-on-one.

Grape diseases mainly damage the green and tender parts of grapes, such as fruits, fruit stalks, leaves, petioles, shoots and tendrils. Grape diseases mainly produce conidia in April and May, which are spread by wind and rain, invade the host, and cause the initial infection. Learn more about viticulture

If you want to know more about grape diseases, we recommend choosing Tiantian Farming. The content of the daily agricultural course includes a full range of agricultural technology courses such as variety selection, cultivation management, pest control, nutrient fertilization, harvesting and gardening. Through course teaching, expert consultation, online and offline training, public welfare activities and other forms of multi-dimensional services for professional farmers and agriculture-related practitioners, to help farmers improve their planting level and increase crop income.

1.Grape black pox.

It mainly harms the leaves, fruits, petioles, stems, cobs, tendrils and inflorescences of grapes, especially the young part is the most damaged, and it is susceptible to damage in the early stage of growth, and the disease is serious when it is rainy and wet in spring and summer.

2.Grape anthracnose.

This disease mainly harms the fruit, and the cob can also be damaged, which is a disease in the late stage of grape growth. Grapes are most affected when the berries are close to ripe in the late stage of berry coloring, so it is called late rot.

3.Grape white rot.

The disease mainly harms old and mature tissues, and is a disease that should occur in the late growth stage. The ears are the most affected, and sometimes the new shoots and leaves are also affected.

4.Grape downy mildew:

It mainly harms the leaves, but also harms the young and tender parts of new shoots, flower buds and young fruits, and the disease should be affected in the later stage of grape growth, which generally begins in June and July, and reaches the peak of disease in September.

5.Grape powdery mildew:

The pathogen mainly invades the green parts such as leaves, new shoots, and fruit ears, and the old and mature organs do not get sick. The leaves begin to produce pinkish-white ash on the surface, and when the disease is severe, the whole leaf is covered with white powder, which makes the leaves curl and wither and fall off.

6.Grape brown spot disease.

It is mainly affected in the middle and lower leaves, and the lesions are divided into large and small brown spots. 1. The lesions of large brown spot disease are round or amorphous, the middle of the lesions is brown or black-brown, and there is a yellow-green halo on the periphery, with a diameter of about 4-8 mm.

<> grape is a very popular fruit that is cultivated in various places and has a wide variety of varieties. What are the common pests and diseases in the growth of grapes?

Common diseases and insect pests of grapes include downy mildew, powdery mildew, black pox disease, two-star leaf chan, anthracnose, rot disease, spot disease, black rot, vine cutting disease, grain blight, scarab, thrips, ten-star ladyboard leaf beetle, spotted wax cicada, green blind bug, grape joint-missing gall mite, grape tiger longhorn talk about the source, etc.