An important point in grapevine care is preventive treatment. In conditions of high humidity, bushes are affected by diseases. Therefore, it is recommended to treat grapes in July after rain, especially if there are foci of disease. Timely measures help prevent the development of fungal diseases on plantings and save the harvest.
Why is processing needed?
It would seem that rain is necessary for all living things, but everything is not as good as it seems at first glance.Long, incessant downpours, warm weather and stuffiness create ideal conditions for development grape diseases. Therefore, in order to preserve the plant and not lose the harvest, it is important to treat the bushes in a timely manner.
Fungal spores cause many diseases:
- oidium;
- rot;
- mildew.
The listed diseases can destroy the crop and the entire bush. The most favorable breeding environment is created during the warm, rainy days of July.
Around the plant in the soil there live many spores that fall with raindrops on the foliage of the grapes. Even if the variety is resistant to diseases, there is a high probability of infection.
With improper care, heavy rainfall provokes the accumulation of moisture around the trunk, which, in turn, forms mold. Its spores become active and begin to harm the plant. Therefore, it is in July, before the start of the growing season, that the soil around the plant and the bushes themselves are brought into proper condition. To do this, the vines are treated in time against diseases.
Preparations for treating vines
Bushes are especially vulnerable after rain. After precipitation stops, the crop is treated with special preparations. Chemicals that can cure infected grapes have not yet been invented. Therefore, processing is designed to perform basic functions:
- Destroys pathogenic microorganisms, which helps reduce the risk of developing diseases.
- When a crop is infected, the treated healthy parts of the plant are less likely to spread the disease.
Most gardeners do not know how to treat their plants. Therefore, before the procedure, it is necessary to study information about suitable means. A complex preparation is suitable for treatment, which is intended for spraying after precipitation.Special products affect different types of fungi, pests and mold.
The drugs that help best are:
- "Topaz". The complex drug protects against various fungal diseases and prevents the spread of mildew. Helps reduce the possibility of anthracnose disease. Used for prevention and at the initial stage of diseases.
- "Strobe." Spraying with the product after rain in hot weather helps fight against the development of downy mildew and prevents the vine from becoming infected with oidium. The main advantage is safety for pollinating insects; it is allowed for use during flowering.
- "Tiovit." Destroys various types of mold and helps in the fight against spider mites.
- "Ridomil Gold". The most effective remedy. Has low toxicity. Reliably protects the crop from fungus, enveloping the leaves from the outside, and acts from the inside.
- Bordeaux mixture. An effective and time-tested remedy. Helps against major vineyard diseases, but is highly toxic. When working with the drug, you will need to observe increased safety measures and prepare strictly according to the recipe. Overdose leads to negative consequences. Processing is allowed at a temperature of 25-36 degrees. Frequent use during the ripening period concentrates the high copper content in the fruits.
Any of the listed drugs, if the recommendations are followed, will benefit the plantings.
Folk remedies
If there are no obvious symptoms of disease, or with minor damage, you can treat with folk remedies. They have a harmless effect on plantings, but are less effective. They are recommended for use as prophylactic agents for grape processing or at the first signs of illness.It is worth examining the basic methods of spraying against the growth of bacteria in rainy weather.
Soda solution
Suitable for use at all stages of the growing season. In July, warm weather helps create a film on the crop that has an alkaline reaction. The solution does not allow fungi to germinate. The bushes are treated before and after flowering.
To prepare the solution use:
- water - 5 l;
- soap - 25 g laundry soap;
- baking soda - 25 g.
The products are dissolved and used for spraying every week.
Copper sulfate
The blue preparation in granules is harmless to the culture. But when dissolved, it becomes a highly acidic agent and can cause harm to plantings.
Colloidal sulfur
Treatment is carried out at the very beginning of the development of ailments. In order not to cause irreparable harm to the plantings, you will need to carefully adhere to the required proportions specified by the manufacturer. Prepare a solution in warm water. The powder is completely dissolved. Use only freshly prepared product. Spraying with the solution protects the crop for two weeks. Treat bushes after rain.
Prevention and pest control
The most common pests:
- grape itch;
- various types of ticks.
These pests are also called felt mites. They are represented by small insects, the length of which does not exceed 0.2 mm. They suck juice from grape leaves by piercing them from below. The insect itself is difficult to see. A yellow swelling appears at the puncture site, which is visible from the top of the leaf. A felt web forms below. As a result, the foliage begins to slowly dry out.
Struggle:
- branches are tied high above the soil;
- remove affected leaves.
For the prevention and control of pests, plantings are sprayed with the following preparations:
- "Kleschevit";
- "Fitoverm".
It is important to properly prepare for the procedure and carry it out correctly.
Preparing for work
There are various methods of pest control, but chemical and biological remain effective.
Preparation rules:
- remove damaged leaves;
- carry out pruning;
- tie up the vine;
- burn diseased, damaged parts;
- break clods of earth, loosen the soil and level the ground.
Use only the amount of product specified by the manufacturer for treatment.
Processing stages
During planned processing, follow the recommendations:
- Plants are treated after rain in the evening, after sunset.
- To achieve the result, the composition must remain on the leaves for a long time. Before processing, pay attention to the weather forecast. If there is a likelihood of continued rain, spraying is postponed.
- When processed during the scorching sun, burns appear on the sheets.
- In hot weather, the solution evaporates intensely, thereby reducing the effect of the drug.
- Carefully treat shoots that have contact with the soil. The chemical only works on the treated parts.
Prevention is an important condition for caring for a vineyard after rains. Even resistant varieties are provided with favorable conditions that help prevent the spread of pests and diseases.
