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For more than two decades, synthetic biological preparations based on natural toxins have been successfully used in agriculture. One of them is the fungicide Strobi. Instructions for use characterizes it as a universal remedy in the fight against fungal microflora.
The active substance of the drug was created on the basis of strobilurins, derivatives of betamethoxyacrylic acid, isolated from the family of common mushrooms. The mechanism of their action is to suppress the mitochondrial respiration of pathogen cells by blocking the synthesis of ATP and is most intense in the early stages of infection, preventing the growth of mycelium and further sporulation.
Description of the fungicide
Strobes can be used to protect:
- fruit trees;
- vineyards;
- ornamental and berry bushes;
- vegetable crops;
- different types of flowers.
The effectiveness of the drug is due to the ability of strobilurins to interact with the surface layer of leaves and other parts of the plant and penetrate into their internal tissues. Fungicide Strobi not only suppresses the action of fungal pathogens, but also prevents the formation of secondary spores, which is very important for diseases such as scab.
Fungicides based on strobilurins do not accumulate in the soil and water bodies, as they are quickly destroyed. For example, when determining the residual amounts of Strobi in apples, its content turned out to be very small, and in cereals it was not detected at all. Strobi has low toxicity to living organisms, which is its main advantage and, at the same time, its disadvantage. Fungi quickly mutate and become resistant to the drug. Drug resistance has been noted, for example:
- in powdery mildew of cereals and cucumber;
- gray rot in greenhouses on vegetables.
The first drugs based on strobilurins appeared in the mid-90s and since then sales have only increased. Among the analogues of Strobi, Trichodermin, Topsin M, Prestige and others can be distinguished. The trade form of the drug Strobi, as evidenced by the instructions for use, is presented in the form of granules packaged in small bags weighing 2 g. In online stores, you can find 10 and 200 gram packages. Convenient packaging and reasonable prices make the product affordable for a wide range of consumers. The shelf life of the drug is 5 years from the time of production. The granules dissolve perfectly in water and do not clog the sprayer.
The greatest activity of the working solution appears immediately after preparation, which should be taken into account when using it. The amount of substance used depends on:
- on the type of cultivated crop;
- approximate area to be sprayed.
The benefits of the drug
Instructions for use and reviews of gardeners and gardeners testify to the undoubted advantages of the Strobi fungicide:
- it can be used during the flowering period;
- due to the ability to be evenly distributed over the surface of the leaf blade, Strobi is effective even with a partial hit;
- spraying with the drug can be carried out on wet leaves, at temperatures from +1 degree;
- the protective effect lasts for a long time – up to 6 weeks;
- for processing small enough volumes of the drug;
- due to rapid hydrolysis, do not accumulate in fruits;
- do not have a negative chronic effect;
- rapidly decomposing, do not have a polluting effect on the environment.
Strobe has a wide range of action and can be used against:
- different forms of spotting;
- late blight;
- powdery mildew;
- varieties of rot;
- scab;
- rust;
- anthracnose;
- gray mold.
Spraying vineyards
Strobi, as indicated in the instructions for use for grapes, is one of the safest fungicides. It effectively treats a vine already affected by a pathogenic fungus, inhibiting the growth of mycelium and further sporulation. Due to this, the disease does not cover large areas of the vineyard. In parallel, protection against the possible action of other pathogens is provided.
Instructions for use advises spraying during the growing season, but no more than 2 times for the entire season and no later than a month before the grape harvest. The spray solution is prepared from a ratio of 2 g of the substance to 6 liters of water.
Processing features
In order for the plant treatment product to give the best effect, some recommendations should be taken into account:
- morning and evening are the most optimal for treatments;
- although the drug is of low toxicity, chemical protection should be used during operation;
- after spraying, work clothes must be kept in a soapy solution;
- for processing it is better to choose a calm day;
- after spraying for three days, gardening is not recommended;
- frequent use of Strobi can lead to the development of pathogen resistance to the drug;
- each spraying with Strobi must be preceded by a treatment procedure with another fungicide that is not included in this class of chemical compounds;
- processing should concern not only parts of the plant – leaves, trunks, fruits, but also the root zone.
The practice of long-term use of Strobi and reviews made it possible to develop recommendations, the implementation of which will help prevent or reduce the emergence of resistance to these drugs:
- spraying should be carried out no later than a week after the rains that provoke the defeat of a fungal disease;
- observe the rules of crop rotation;
- for planting use high-quality seed material.
Color Protection
With the help of Strobi, flowers protect against diseases such as powdery mildew and rust. Spraying is carried out every 10 days with a solution containing 5 g of the substance per bucket of water. For garden roses, the treatment schedule with Strobi’s solution shifts slightly – they are sprayed once every two weeks, and also before being covered for the winter.
Flowers affected by a fungal disease must be treated with a complex of fungicides, combining Strobi with other means, for example, with Topaz. It is also necessary to alternate spraying with Strobi solutions with fungicides that have a different mechanism of action to prevent resistance. In the second year of treatment, Strobi should be excluded.
vegetable crops
For spraying vegetables, a solution is prepared at the rate of 2 g of the drug per 10 liters of water. Strobe is effective:
- when powdery mildew or late blight appears in tomatoes;
- brown spot in carrots and peppers;
- peronosporosis – in cucumbers, garlic and onions.
Instructions for use recommends that during the vegetative period, spraying cucumbers and other vegetables with Strobi fungicide alternate with other drugs. The next year they change the place of planting vegetables. After the last processing of the season before harvesting cucumbers and tomatoes, the following must pass:
- in open beds – up to 10 days;
- in greenhouses from 2 to 5 days.
Fruit trees
The main problem of fruit trees is the occurrence of scab and powdery mildew. The action of the drug Strobi against these pathologies is to inhibit the process of spore germination. At the same time, other fungal diseases, such as rot of various types, are also prevented. In the treatment of scab on apple and pear trees, such an interesting effect as leaf greening is observed.
According to the instructions, the Strobi fungicide solution is prepared in the usual proportion of 2 g per bucket of water. Spraying is carried out no more than three times during the growing season and in alternation with other drugs. From the day of the last treatment to harvest, at least 25 days must pass.
User Reviews
The drug Strobi has long gained popularity among summer residents and gardeners. This is evidenced by their positive reviews.
Conclusion
If you clearly follow all the requirements of the instructions for the use of the Strobi fungicide, then both the safety of the plants and their rich harvest will be ensured.
