How and what to process tomatoes from late blight in a greenhouse: a review of the best remedies and effective folk methods

Late blight is tacitly considered the worst enemy of tomatoes. And this is quite justified, because the disease arises easily, but plants can be cured only with the help of professional or proven folk methods.

Dangerous microbes can be found anywhere: on seeds, in soil, in gardening tools. Fortunately, preventive measures help prevent tomato contamination. Consider further what late blight is and how with it experienced summer residents are fighting.

Signs of damage to tomatoes by late blight

Get sick late blight and varieties and hybrids. Even if all agricultural rules are followed, the disease can destroy most of the crop. Phytophthora is a fungal disease.

Plant infection occurs through fungal spores that enter the stem through the stomata. The causes of infection most often lie in improper care, high humidity, sharp climatic changes.

The fungus appears in the form of yellow and brown leaf spots... You can also recognize the disease by dry leaves and a withering stem. If measures are not taken in time, then the tomatoes themselves begin to turn black and rot, brown ulcers appear on vegetables.

Important! Most often, signs of late blight are noticed in late July and early August. It is at this time that there is heat and high humidity. Dew and fog also help late blight to develop faster. If you do not take action, tomatoes have time to turn black in a day.

Rules for processing tomatoes from late blight in a greenhouse

The greenhouse and greenhouses have a special microclimate and high humidity, so summer residents are advised to use some tricks. They will help protect the crop from late blight and a number of other diseases:

1. Cover the greenhouse with thick plastic... Water droplets accumulate on the roof at night and drip onto the plants during the day. In these very droplets, phytophthora spores can live. An impromptu barrier prevents infection.
2. In dense planting conditions, the risk of developing the disease increases, therefore the distance between the bushes should be at least 0.5 m.
3. Ventilate the greenhouse regularly with an open door or vents... If this is not done, then the constant high humidity will become the root cause of infection.

When and how to process

How to process tomatoes from late blight in a greenhouse? Oxykh is recognized as an excellent tool. The drug is sold in powder form and dissolves easily in water. The effectiveness of Oxychom does not depend on weather conditions. The medicine reduces the activity of pathogens and inhibits harmful cells.

Dissolve 20 g of powder in 10 liters of water, then sprinkle the bushes with the resulting solution. Make sure that the drug gets more on the plant than on the ground. Perform the procedure only with gloves and a respirator.

Also an effective tool is "Profit Gold". The remedy is valid for two weeks. The drug is produced in the form of granules, which are dissolved in water in a ratio of 6 g per 10 liters of water. For the first time, "Profit Gold" is used immediately after the detection of signs of late blight. In the future, summer residents recommend carrying out the procedure 1 time in 3 weeks for preventive purposes.

Important! "Oxyhom" and "Profit Gold" are fungicides, which are a group of chemical preparations for fungal diseases.To combat late blight in the greenhouse, it is recommended to use fungicides, since they are most effective, especially when it comes to polycarbonate structures.

How to process tomatoes

All means of prevention and treatment of plants from late blight are divided into the following categories:

1. Agrotechnical techniques, such as: removing weeds, burning garbage, disinfecting the land, etc. It is they who create favorable development conditions for tomatoes. For example, decontaminating the soil helps to eliminate harmful microorganisms in the soil and prevent contamination. Weeds are also removed in order not to create propagation conditions for the fungus.
2. Chemicals. This group represents the most powerful formulations that are most often used in strict accordance with dosages and directions for use. Most chemicals are phytotoxic, so you need to treat the beds with them two weeks before fruiting the bushes.
3. Folk remedies. More affordable and easier to use drugs. Foliar spraying and treatment help fight late blight.

Purchased chemicals

Purchase chemicals in specialized shops for gardeners. They are most commonly sold as liquid, powder, or granules. Such funds are convenient to use and fight the disease most effectively.

What means do most gardeners prefer? Consider the TOP-5 of the most effective, affordable and environmentally friendly drugs for combating late blight of tomatoes:

1. "Fitosporin M" - comes in the form of powder, paste or liquid. It is used at any stage of plant development. The effectiveness of "Fitosporin M" is from 65 to 95%.
2. "Gamair"- occurs in the form of tablets or powder. The drug is safe for both plants and humans. In addition to tomatoes, it is used for processing cereals, cucumbers and grapes.
3. "Quadris" - in addition to protecting against disease, it improves the quality of the crop and increases its shelf life. Refers to fungicides.
4. Ridomil Gold - is widely used by gardeners throughout the country. It is most effective as a prophylactic agent, but it also shows excellent results as a medicine. Reviews about him are extremely positive.
5. Thanos - has a healing effect, is not washed off by irrigation and rain. Forms a protective film on the leaves, which prevents spores from penetrating deeper.

Traditional methods

Any disease sticks to plants with weak immunity. Therefore, it is important to have with you in such a case improvised means, which at an early stage help prevent the development of late blight.

Hydrogen peroxide

The colorless liquid disinfects any damage on tomatoes and eliminates dangerous microbes that live in the soil. Also, due to the oxidizing effect, peroxide improves the quality of water for spraying and irrigation.

As a preventive measure, moisten the soil with a solution of peroxide at the rate of 3 liters of water per 60 ml of the preparation. If the disease has already appeared, then treat the stems and leaves with a peroxide solution at the rate of 1 liter of water for 2 tbsp. l. peroxide.

Copper sulfate

One of the advantages of copper sulfate is that it does not absorb into the soil and tomatoes. The product is available and not addictive to plants. The effect of the treatment lasts for two weeks.

To make a liquid, you will need 50 g of granules and 5 liters of water. Tomato beds are processed in the early morning or evening. If the weather forecast promises rains, then it is better to postpone the procedure for another day.

Iodine

Another economical and effective method for the prevention and control of late blight. For 10 liters of water, 20 drops of iodine are needed. In addition to treatment, the solution accelerates the development of the bushes. It is recommended to treat the bushes with liquid every two weeks.

Also, experienced farmers add 1 liter of skim milk to the solution. It forms a protective barrier on the leaves. You can use the medicine even during the ripening period of tomatoes.

Interesting... There is a legend about the invention of iodine. It appeared thanks to the French chemist Courtois Bernard in 1811. It is believed that the scientist's cat is "to blame" for this: the pet jumped onto the table, where there was an alcoholic solution of seaweed ash and sulfuric acid. After accidentally mixing liquids, iodine was obtained.

Kefir

To make the medicine, you will need 1 liter of fermented kefir and 10 liters of water. In humid summer conditions, the bushes are sprayed every week. Also, instead of kefir, milk whey or milk is used. The tool effectively fights fungus both on leaves and tomatoes.

Garlic and potassium permanganate

To prepare the product, you will need 100 g of chopped garlic, 1 g of potassium permanganate and 10 liters of water. The beds are sprayed every 10 days. For 1 bush, 0.5 l of solution is consumed.

Manganese is one of the most powerful drugs for disinfecting seeds, soil and bushes.

Tree tinder fungus

The mushroom has been famous for its beneficial properties since ancient times. Take 100 g of dry chopped mushroom per 10 liters of boiling water. After the liquid has cooled, strain it. Use the product every 10 days.

Tips and tricks from experienced gardeners

To prevent the disease, the first processing of tomato beds is carried out no later than 14 days after planting. Then the spraying is repeated every 10-15 days. Also, do not forget about loosening and weeding the beds. Do not plant tomatoes next to potatoes, as the risk of late blight infection increases.

Sprinkle ash on the beds from time to time - it lowers the acidity of the soil and improves its nutritional properties. If the summer is hot and humid, reduce the number of waterings. If, on the contrary, the weather is dry, then moisten the beds more thoroughly. Use a drip irrigation system for the most efficient liquid distribution. Thanks to it, moisture flows directly under the root, bypassing the stem and leaves.

If you use fungicides, then carefully read the information on the package and do not overdose. Most chemicals can only be used during flowering. For the best effect, fungicides are advised to alternate.

Important! Don't forget about feeding... Organic and mineral complexes increase the plant's immunity, making it stronger and more resistant to late blight and other diseases. Bushes with nitrogen-containing substances, such as urea or ammonium nitrate, develop especially well.

Conclusion

There is still no such variety that would have 100% immunity to late blight. Even the best hybrids get sick occasionally. Therefore, it is important to have with you means that will quickly and effectively protect the beds from the fungus.

Do not neglect prevention, because it helps to avoid many problems. If the plant still gets sick with late blight, immediately sprinkle with manganese, milk whey or iodine. Use fungicides to combat progressive disease.