Content
For more than two decades, synthetic biological preparations based on natural toxins have been successfully used in agriculture. One of them is the Strobi fungicide. The instructions for use characterize it as a universal remedy in the fight against fungal microflora.
The active substance of the drug is 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 mitochondrial respiration of pathogen cells by blocking the synthesis of ATP and is most intensely manifested 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 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 found at all. Strobi has low toxicity for living organisms, which is its main advantage and, at the same time, a disadvantage. Mushrooms mutate quickly and become resistant to the action of the drug. Drug resistance has been noted, for example:
- 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 volumes have only increased. Among the analogs of Strobi, Trichodermin can be distinguished, Topsin M, Prestige and others. The commercial form of the drug Strobi, as evidenced by the instructions for use, is presented in the form of granules, packaged in small sachets weighing 2 g each. In online stores you can find 10 and 200 gram packs. Convenient packaging and reasonable prices make the product available to a wide range of consumers. The shelf life of the drug is 5 years from the date of manufacture. 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:
- from the type of cultivated crop;
- approximate area to be sprayed.
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 applied during the flowering period;
- due to the ability to be evenly distributed over the surface of the leaf blade, Strobe is effective even with a partial hit;
- spraying with the drug can be carried out on wet leaves, at temperatures from +1 degrees;
- the protective effect lasts for a long time - up to 6 weeks;
- for processing small enough volumes of the drug;
- due to rapid hydrolysis, they do not accumulate in fruits;
- do not have a negative chronic effect;
- rapidly decomposing, they 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 vines already affected by a pathogenic fungus, inhibiting mycelium growth 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 advise to spray 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 the ratio of 2 g of substance to 6 liters of water.
Processing features
In order for the preparation for processing plants to give the best effect, some recommendations should be taken into account:
- morning and evening times are the most optimal for treatments;
- although the drug is low-toxic, chemical protection should be used during work;
- after the end of spraying, work clothes must be soaked in soapy water;
- it is better to choose a calm day for processing;
- after spraying for three days, gardening is not recommended;
- frequent use of Strobi can lead to the development of resistance of pathogens to the drug;
- each spraying with Strobi should be preceded by a treatment with another fungicide that is not included in this class of chemical compounds;
- treatment should concern not only parts of the plant - leaves, trunks, fruits, but also the root zone.
The practice of many years of use of Strobi and reviews allowed us 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 rains provoking a fungal infection;
- follow the rules of crop rotation;
- use high-quality seed material for planting.
Flower 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 schedule of treatments with Strobi 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 agents, 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 processing, Strobe should be removed.
Vegetable crops
For spraying vegetables, a solution is prepared at the rate of 2 g of the drug per 10 l 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 recommend spraying cucumbers and other vegetables with Strobi fungicide during the growing season with other preparations. The next year, they change the place of planting vegetables. After the last treatment of the season, before the harvest of cucumbers and tomatoes, there must be:
- on open beds - up to 10 days;
- in greenhouses from 2 to 5 days.
Fruit trees
The main problem with fruit trees is scab and powdery mildew. The action of the Strobi drug against these pathologies is to inhibit the process of spore germination. At the same time, other fungal diseases are prevented, for example, various types of rot. When treating scab on apple trees and pears, there is such an interesting effect as planting foliage.
According to the instructions, a solution of the Strobi fungicide 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 elapse.
User reviews
The drug Strobi has long been popular among summer residents and gardeners. This is evidenced by their positive reviews.
Conclusion
If all the requirements of the instructions for the use of the Strobi fungicide are strictly followed, both the safety of the plants and their rich harvest will be ensured.
