Throughout the growing season, tomatoes are attacked by various fungal diseases. Fungicides will help prevent the development of the disease or cure the plants. Manufacturers of the chemical industry produced a large number of drugs, but not all are effective. What fungicides will quickly cope with fungal diseases?
What are fungicides, their classification
From Latin "fungicide" translates as "mushroom" and "kill." That is, fungicides are substances that are aimed at suppressing and destroying fungi of various origins. Spores of fungi are the causative agents of most diseases that infect tomatoes. Depending on the criterion, fungicides are divided into types:
The total division of drugs:
- chemical origin. To destroy fungi use toxic chemical compounds that allow you to quickly eliminate the symptoms of the disease;
- biological origin. Preparations are made up of 90% of beneficial living microorganisms that destroy harmful fungi. Biological fungicides of low toxicity.
Depending on the properties:
- inorganic. The composition contains compounds of various heavy metals, which block the access of oxygen to fungal spores. Most often in preparations meet: manganese, mercury, sulfur, nickel, copper, iron;
- organic - environmentally friendly products that quickly decompose in the soil.
Depending on the direction of action:
- prophylactic, which prevent the development of diseases;
- eliminating fungal spores. Use when the plant is already infected.
The most effective drugs
In order not to waste energy on the search for effective fungicides, we give a list and a brief description of the most effective fungicides of chemical and biological origin for the processing of tomatoes.
Fungicide broad-spectrum. Available in suspension. It is based on the chemical substance azoxystrobin. The drug will save tomatoes from: late blight, powdery mildew, Alternaria. The action comes an hour after the processing of tomatoes. When a substance gets on the spores of fungi, it completely blocks access to oxygen, which leads to their death. Action after spraying lasts up to 3 weeks. To treat 1 m² of plantings, 800 milliliters of mortar are needed. The working mixture is prepared on the basis of 5 liters of water and one ampoule of substance (6 ml).
Spray early in the morning or evening. It is not recommended to spray before or immediately after the rain.
The drug with contact-systemic action. The fungicide contains two active substances: mancozeb and dimethomorph. It acts not only outside, but also penetrates the plant cells. Available in the form of granules, which must be dissolved in water. Begins to act on day 3 after treatment. Protects tomatoes from phytophthora, black spot, macrosporosis. The solution is prepared on the basis of 5 liters of water and 20 grams of the drug. "Acrobat" refers to the second class of toxicity, but does not poison the plants and worms themselves in the soil, near tomatoes.
Contact-systemic fungicide, which is used for the prevention and treatment of late blight, powdery mildew, and peronosporiosis.The drug contains two active substances, mancozeb and metalaxyl. To spray tomatoes, you need to prepare a working solution. In a bucket of water dissolve 25 grams of the drug, stir until the components are fully combined. "Ridomil" refers to the second class of danger. Not compatible with other chemicals. For prophylaxis use 200 milliliters per 1 m², and for the treatment of 1 liter. The effect of the substance on plants will last up to two weeks. If necessary, the processing is repeated.
Biological drug that suppresses the development of fungal diseases, as well as activates the development of tomatoes. Available in the form of pasta. Used for prevention and treatment: root rot, powdery mildew, phytophthora, black spot, etc. For spraying tomatoes need to dissolve 140 milligrams in 3 liters of water. Agat 25K is compatible with other fungicides and pesticides. The period between spraying is 20 days. In addition to foliar treatment, seed soaking is widespread (solution: 3.5 grams per 1 liter of water).
Fungicide with active ingredient fludioksonil. The destruction of fungi occurs within 2 days after spraying, the effect lasts up to one and a half months. The drug has a hazard class 3. Allows you to prevent or cure: fusarial wilt, root and gray rot, Alternaria, powdery mildew. Available in suspension form. For processing tomatoes using a solution based on the bag "Maxim" (4 ml) and 10 liters of water. The drug continues to operate for 3 months from the day of spraying.
The drug with the active substance benomyl. It penetrates into the cells of fungi and destroys them from the inside. Protects plants from fungal diseases, insects, ticks. Tomatoes will save or cure verticillous, fusarium wilt, powdery mildew, septoria, phytophtora, gray rot, fomosis, black leg. Form release - powder. For spraying use a solution based on 10 grams of powder (1 sachet) and 10 liters of water. The result of benomyl is noticeable on the third day. Protection of tomatoes after processing lasts up to 3 weeks. Has a second class of danger, it is not uncommon for a person to cause allergic reactions.
Compound slaked lime, water and copper sulfate. One of the most common ways in the fight against fungal diseases of various kinds of origin. The working solution for processing tomatoes is prepared on the basis of 100 grams of copper sulphate, 150 grams of lime and 10 liters of water. Consumption per 1 m² is 200 milliliters of the resulting liquid. Use the "Bordeaux mixture" can be no more than 2 times during the growing season, with a frequency of two weeks. The last time tomatoes can be sprayed 20 days before harvest, so that the substances have time to evaporate and not harm the human body.
The drug that performs the function of fungicide and organic fertilizer of plants. Biological substances can increase the growth of vegetable crops, increase resistance, and suppress diseases: scab, late blight, macrosporosis, fusarium wilt. Available in the form of a liquid suspension. For foliar application dissolve two caps of the substance in a liter of water. Spraying procedure is repeated every 3 weeks, as necessary. Low toxicity. Do not process more than 5 times during the growing season.
Fungicide containing two active substances: famoxadone and cymoxanil. Getting on the surface of the leaf plate or stems, within an hour the substance penetrates into the plant cells, which allows protecting tomatoes for up to a month. The manufacturer produces "Thanos" in the form of granules. The tool quickly and effectively cope with late blight, Alternaria, powdery mildew, top rot, gray spot, etc.
Preparation of a solution for the processing of tomatoes: take 6 teaspoons of granules (6 grams) and dissolve in a bucket of water.Preventive spraying is carried out ten days after transplanting seedlings to the garden bed. Repeat treatment after two weeks. During the season can not be sprayed more than 4 times.
Systemic drug with contact action. Protects plants from fungal attacks. The main chemical components of the drug are mancozeb and metalaxyl. Effectively resists the infection of tomatoes with late blight and Alternaria, if preventive measures are taken. Mancozeb protects the outer shell of the plant from fungus disputes, while metalaxyl protects from the inside by penetrating the cells of the leaves, stems and fruits. Available in the form of a powdery substance and granules. Belongs to the second class of danger to humans. Tomatoes are treated with a solution based on 25 grams of powder and 10 liters of water. The resulting liquid is enough to handle 100 m².
Biological agent against fungal and bacterial diseases. Available in powder, paste and liquid form. Used for the prevention and treatment of: Alternaria, powdery mildew, bacterial blotch, root rot, peronosporoz, dry or wet rot, late blight, rhizoctoniosis, fomoz, fusarium wilt, etc. Seeds for planting soaked in a solution based on half a teaspoon of powder and 100 milliliters of water. For spraying tomatoes, 5 grams of powder is dissolved in 10 liters of water. Processing is carried out every 14 days. The drug is safe for the environment.
Long-term systemic fungicide. The drug is based on two active ingredients: fluopyram and pyrimethanil. In addition to the suppression of fungi, a chemical agent increases the resistance of tomatoes, increases yields. Tomatoes are sprayed 4 times per season. Processing is carried out with a frequency of 10-12 days. Preparation of the solution for spraying: 20 ml of the drug is dissolved in a bucket of water.
The effectiveness of chemical and biological products tested over the years of use. For prevention, choose biological agents. But with an extreme degree of manifestation of the disease is better to use chemicals, the action of which will quickly get rid of the disease.