White bloom on grape leaves: how to process and how to fight

Grapes are a popular fruit and berry crop. Modern summer residents use varieties of shrubs for planting on their plots. Commercial horticulture grows reference varieties for further wine production. Landscape designers use green fences from this plant in their projects. Every lucky owner of this shrub should be aware of the danger of white bloom on grape leaves. A dangerous fungal disease requires timely treatment and competent prevention.

Signs

Vine bushes are a great option for planting in the garden.The plant is often used as an ornamental hedge. Thanks to the densely growing foliage, the grapes create coolness and shade. When caring for him, do not make much effort. It is worth paying special attention to preventive measures of plant diseases. They can greatly spoil the planting, harvest.

The main manifestation of the lesion is a white coating on the leaves, clusters. To determine the type of disease, it is necessary to check the grapes for the presence of characteristic signs:

1. White coating on leaves, berries, resembling flour, indicates infection of the shrub with oidium - a fungal disease. It spreads on leaves, flowers, shoots. Fungus spores extract nutrients from the plant. As the disease progresses, the leaves turn black and dry. Spoiled parts of the grapes are carriers of oidium.
2. Yellow oily spots may form on the vine.If, when wet, they become a fluffy white bloom, then the grapes are affected by mildew. With the course of the disease, the leaves become yellow-brown, dry, crumble. Mildew also applies to inflorescences, fruits. It is a big threat to quality crops.

Often the foliage spoils from above. But don't overlook the bottom. Sometimes a white coating first appears there.

Causes of the raid

To prevent the appearance of white plaque on the grapes, the reasons for its formation on the grape bush should be taken into account:

1. Uncomfortable environmental conditions. Frequent rains, severe drought, winds can trigger the spread of fungal diseases.
2. Not enough fertilizer. Lack of nutrition necessary for the plant leads to a weakening of its immunity.
3. Lack of competent bush care. Poor watering and improper pruning lead to drying or waterlogging of the soil, excessive growth of foliage. Moist dark environment - favorable conditions for the development of fungal diseases.
4. Poor cleaning of the area around the landing. Fungus spores persist on fallen leaves for a long time. Even after twenty years, they are able to penetrate foliage, flowers, berries, shoots.
5. Poor quality soil, wrong landing site. A shrub planted in an unfavorable location will not grow well. Poor soil composition will limit the intake of essential nutrients.

There are many reasons for the appearance of plaque on a grape bush. Fungal bacteria are carried by birds and rain. Only high-quality care, timely preventive measures can prevent plant infections.

Methods of dealing with plaque

Processing affected grapes should be carried out without delay. Experienced gardeners give simple recommendations on how to deal with the consequences of white bloom:

1. Spraying with potassium permanganate. Several crystals of manganese are dissolved in 1 liter of water. The liquid should be light pink in color. The diseased and he althy leaves of the shrub are carefully treated with a solution. Carry out the procedure 1 time in two weeks, avoiding the flowering period.
2. Colloidal sulfur. 10 g of the component is stirred in a bucket of water. The shrub is treated with a solution once a week until flowers appear. The method is used in case of serious damage.
3. A solution of ash and laundry soap. 1 kg of ash is dissolved in 10 liters of water. Soap is necessary to better fix the mixture on the grape leaves. Before spraying, the product should be infused for 3-4 days.
4. Bordeaux liquid with colloidal sulfur. A mixture of two agents is considered a potent drug in the fight against white plaque. For 5-7 liters of water, they are mixed in a ratio of 1: 1. You can process immediately.
5. Chemicals. In specialized stores you can buy insecticides for spraying. Among the most effective are Topaz, Ecosila, Ridomil Gold. They are used individually or simultaneously.

The decision on how to treat a plant is made based on the extent of the spread of plaque, the degree of neglect of the disease. It is worth considering that grapes can get used to the applied method of treatment. It is recommended to alternate treatments for maximum positive effect.

Prevention

Preventive measures to prevent the appearance of white plaque on grape bushes are required. In some cases, even the most well-groomed plant is affected by fungal diseases. Regular implementation of the recommended actions will increase the level of protection of the grapes:

1. Use of solutions, special preparations. In the spring, before flowering, the bush is treated with a solution of sulfur-based pharmaceutical products. Immediately after winter, grape shoots are sprayed with water with potassium permanganate. The procedure is repeated with the onset of cold weather before sheltering the plant.
2. Quality, timely fertilizer. Grapes quickly absorb nutrients from the soil. In this regard, the soil ceases to be useful - the plant weakens. Good nutrition is essential. It is recommended to apply potash, phosphorus fertilizers in the spring. Ash, sawdust, humus are perfect for this purpose.
3. Cleaning the territory. Fungal spores tend to linger for a long time in the affected fallen leaves, shoots, fruits. They then spread easily to he althy plants. In this regard, it is necessary to collect and destroy dry branches, leaves, rotten fruits.
4. Regular inspection of grapes. A thorough check of the bush shoots will contribute to the early diagnosis of the disease, the use of treatment methods at the initial stage.
5. Cropping. Thick foliage and curling flexible shoots often hide the first signs of the disease. It is important to cut off excess branches in a timely manner, remove foliage. The procedure is carried out in the spring - after the wintering of the plant, in the winter - before shelter.During the season, when inspecting the grapes, dry shoots are removed.

Many consider grapes to be a capricious plant. It is unpretentious in care, but is affected by dangerous fungal diseases. Do not neglect simple prevention methods to maintain a he althy planting, get a bountiful harvest.

Grapes are a great option for planting in a small summer cottage or a large garden area.

The plant performs many useful functions: from fruiting to decorating the territory. In some cases, a white coating on its leaves and clusters can interfere with the qualitative development of a shrub. This dangerous fungal disease is treatable. It is necessary to carry out timely preventive measures, to carry out the necessary care procedures. They will prevent damage or death of the plant.

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