Phytophthora on tomatoes: how to fight, treatment, processing and spraying

Late blight on tomatoes appears most often. This disease affects a young and adult plant. In order for the cultivation to be without problems, and the harvest to please with quality, you need to know the preventive measures and methods of control when the disease has already begun to spread.

Signs of infection

Late blight is also called brown rot, it affects a vegetable crop, which belongs to the nightshade. It is difficult to deal with it, since the fungus cannot be de alt with in simple ways. Therefore, it is better to focus on prevention. The spores that cause the disease live in the soil, on the tops of the last crop, on garden tools, all year round.

To know how to deal with late blight on tomatoes, you need to find out what caused its development. The likelihood that late blight of tomatoes will appear on the beds depends on some features:

climate that prevails in the region;
weather conditions at the time of plant vegetation;
the timing of the appearance of the fungus (the younger the bush, the more detrimental to the disease);
degree of disease resistance of the selected variety;
carrying out protective measures at various stages: seed treatment, soil, seedlings, adult seedlings.

The first symptoms of phytophthora on tomatoes are manifested by a white bloom on the inside of the leaves. Therefore, the problem is difficult to detect at the first stage. Spores spread quickly and in three days the whole plant becomes infected. Signs of late blight look like black spots on the leaves, stem, fruits.

Identification of the cause

Often late blight on tomatoes develops due to improper care. Provoking factors include:

long rains, foggy weather;
excessive watering preventing the soil from drying out;
over-application of nitrogen fertilizers;
lack of trace elements in the soil;
dense planting, not respecting the distance between the planted bushes.

Late blight is just as terrible for greenhouse tomatoes. In a confined space, the infection appears more often, since the composition of the soil remains constant. It is necessary to regularly ventilate the room, and reduce the humidity of the air if a problem occurs.

How to protect tomatoes, you need to properly care for vegetables.Fertilizers should be applied in time, loosen the ground and remove weeds. Watering should be done as the soil dries out. If the beds are planted with seeds, then thinning should be carried out at least twice. When transplanting seedlings, you need to keep a distance of 50 cm.

Spores don't like sunny, hot weather. Therefore, at this time, their activities are terminated. But as soon as it starts to rain, their distribution reaches a maximum.

How to deal with late blight on tomatoes, you need to consider a few points. The plant should be watered in the morning, so that in the remaining time of the day the moisture is absorbed by the roots, and the excess evaporates. You need to pour water under the root, avoiding getting on the green part of the seedling.

The spread of the disease is observed in the second half of August, when the weather becomes cool and damp. Early varieties of tomatoes, which have time to ripen until the end of August, are most protected from phytophthora in open ground. They are less prone to late blight.

Spores under adverse conditions begin their activity and fall on the greenery along with the flow of moist air. How to protect tomatoes from late blight, the mulching procedure will help. Straw, chopped grass, peat, sawdust are well suited as mulch.

To prevent black spots on tomatoes in the open field, they should be planted at a great distance from each other. In this case, air and light will reach any areas in sufficient quantities.

Prevention measures

So that the infection does not ruin the crop, it is better to start fighting it in advance. How to cultivate the land as a preventive measure?

Prevention of late blight of tomatoes begins to be undertaken in the fall, when the harvest is harvested. The tops that remain from vegetable crops must be removed from the garden plot.
If there is excess lime in the ground, it is recommended to add sand.
For three years, seedlings should not be planted in the area where eggplants, potatoes or peppers used to grow.
Before planting seeds or seedlings, the soil should be watered with a solution of potassium permanganate.
To prevent disease, it is useful to plant garlic and onions next to tomatoes.
Spraying young sprouts with infusion of garlic helps. Garlic cloves and plant tops are suitable for cooking, which are crushed and poured with water. Leave to infuse for two days.
Fitosporin can be bought at a specialized store. It contains only natural ingredients that do not harm plants. Spraying with a diluted solution is carried out after 1.5 weeks.

If tomatoes are supposed to be grown in a greenhouse, then the entire room, including the ground, must be processed. Prevention of late blight on tomatoes in a greenhouse involves the following activities:

the top layer is removed, approximately 18 cm, and a new layer of fresh soil is filled in;
useful to plant dill, calendula, mustard, as they fertilize the soil and disinfect it;
as an open ground treatment, you can use phytosporin or copper sulphate (fungal activity is suppressed in the cultivated land).

The fight against late blight on tomatoes in a greenhouse or in an open area can be carried out using copper wire. Copper contains many trace elements, it is also involved in the synthesis of chlorophyll, in respiratory and metabolic processes. With a lack of copper, plant growth stops and immunity decreases. Description and treatment with this method is not difficult.

Copper wire from phytophthora on tomatoes will increase the plant's resistance to this disease. An ordinary cable is released from the outer sheath and the wire is cut into strips of 4 cm. This copper strip is pierced through the stem of each seedling seedling.

From phytophthora in the greenhouse, you can use a piece of copper, which is placed under an adult plant. In this case, with each watering, components important for the plant will enter the soil.

Ready-made products from the store

When late blight is found on tomatoes, how to deal with? You can use purchased drugs from phytophthora based on chemical components. Tomato processing can be carried out using tools such as Quadris, Boric acid, Hom, Bordeaux liquid. After treatment with these drugs, it is impossible to pluck the fruits for about three weeks.

How to save a plant from late blight, biological preparations come to the rescue. They include beneficial microorganisms, which fight the pathogenic flora. After them, vegetables can be eaten, but only thoroughly washed. Tomato protection can be carried out using Fitosporin, Trichophyt, Guapsin.

Hom remedy does not cope with a large area of late blight distribution, but it perfectly prevents the problem. After processing, a film is created on the leaves, which prevents the penetration of bacteria inside. The active substance is copper oxychloride. Dissolve 40 g of the drug in a bucket of water. You need to spray in calm, dry weather. After spraying, the vegetable crop will be protected for two weeks.

Reviews of these preparations for processing tomatoes in open ground are mostly positive: “I always process vegetables in early summer with Hom. I've never encountered late blight before. Now I also advise my neighbors in the country this remedy, it will definitely save you from many diseases. ”

Healing actions using folk recipes

If it was not possible to prevent late blight on tomatoes, and black spots were noticed on the leaves, then you need to start the fight as soon as possible, otherwise the risk of losing the crop will increase every day.

Treatment of late blight of tomatoes begins with getting rid of infected bushes. It is recommended to uproot the affected plants and remove them away from the garden. If the bushes grow in a greenhouse, then it must be ventilated after cleaning. The remaining bushes need to be treated with chemical or natural compounds.

Folk remedies for late blight on tomatoes help to fight this type of fungus. At home, you can independently prepare medicinal solutions from natural products. How to spray tomatoes from phytophthora, the components that every housewife has in the house will do.

Processing of tomatoes from late blight can be done with table s alt, which inhibits the activity of bacteria. It is necessary to dissolve a glass of s alt in water. Spraying the green part of the plant is carried out after the removal of the infected parts. S alt film prevents bacteria from spreading.
Iodine solutions with whey are popular.Iodine from phytophthora helps to disinfect the surface, stop the reproduction of spores and prevent re-infection. A liter of whey is diluted in a bucket of water and mixed with 20 drops of iodine. The components are able to saturate the plant with trace elements, and prevent the growth of bacteria. Spraying once a week is shown.
If it is decided to fight late blight on tomatoes with folk remedies, then you can not do without a recipe based on live or dry yeast. Thanks to yeast, not only the fungus disappears, but the development of the vegetable improves. You need to water with a solution weekly.
How to get rid of phytophthora on tomatoes, an infusion based on wood ash helps. The ash is poured with water and insisted for three days. Before watering, the solution is diluted with water and crushed soap is added.

Many advise using wood ash: “Get rid of rot and other infection by sprinkling with a dry protective compound or wood ash infusion. After it, the plant begins to develop better and does not get sick.”

The fight against late blight on tomatoes with folk remedies is absolutely safe, and the components that make up the most popular recipes can get rid of the problem for a long time.

You need to know how to fight folk remedies against infection. Be sure to follow the recommended dosages. Many components, if overdosed or improperly prepared, can lead to rotting of the root system.

Other ways to fight

How to process tomatoes from late blight? Late blight treatment on tomatoes can be done with time-tested fungicides.

Furacilin from late blight on tomatoes has been used for a long time. The solution has proven itself to be effective. For one liter of water you need to take one tablet. The first time to spray should be before flowering, then during the formation of ovaries and the last time during the formation of the first fruits.
Protection of tomatoes from phytophthora is carried out with a composition based on copper sulfate (60 g) or calcium nitrate (30 g). The selected component is poured with water and the bushes are treated before flowering begins.
How can you deal with late blight on tomatoes in a greenhouse? You can process tomatoes with Trichopolum. The medicine is an antibiotic that can fight many pathogenic bacteria. Take one tablet per liter of water. The resulting composition is recommended to use every two weeks.
Metronidazole is used against late blight. It is better to spray the plant in early summer. Two weeks before the harvest, the procedure is carried out again. Dissolve 15 tablets of Metronidazole in a liter of water. The soil is watered with the finished solution, you can lubricate the tomato leaves.

Earth after phytophthora must be treated. To destroy the spores of phytophthora, fungicides and biological products are used. Chemical preparations must be applied in the spring, biological preparations are allowed to be added to the soil at any time, except for the beginning of flowering.At this time, insects fly to the plants, and the composition of the preparations may be harmful to them.