Herbicides for sunflower: types, best preparations with instructions for use

In ancient times, the "sun flower" was cultivated by the Indians, now the one-year-old sunflower is planted wherever it takes root. Oilseeds germinate slowly, seedlings are quickly drowned out by weeds, which are simply unrealistic to weed out by hand over large areas. Before the appearance of sprouts in sunflower, the soil is treated with herbicides. Chemicals are sprayed over plantings and during flowering. The preparations not only deal with weeds, but also prevent the development of diseases in plants.

Types of herbicides

Sunflower cultivation technology involves the use of 4 types of pesticides, each of which is required at a certain stage.

Pre-emergence

Oilseeds do not germinate in 3 or 5 days, but in 2 weeks. At this stage of development, the sunflower requires a lot of moisture and nutrients, which are selected by weeds. If the grass is not destroyed early, there will be insufficient reserves in the ground for the development of the crop, which leads to a decrease in productivity in the future.

To cope with cereal annuals and dicotyledonous grass before emergence, contact herbicides are applied to the topsoil along with the seeds. One of these preparations, "Harnes", penetrating into weed tissues, inhibits growth, disrupts cell metabolism, and makes it possible for sunflower to develop.

"Pioneer 900" is used to prepare a concentrated solution that is sprayed on the field until the seeds sprout. The earth is harrowed so that the substance gets into the deep layers of the soil, destroys the amaranth, chamomile, shepherd's purse and decomposes.

Post-emergence

If herbicides were not applied to the soil with the seeds, when three or four leaves appear, chemicals are sprayed on sunflowers that inhibit the production of amino acids in weeds.

Preparations are marketed as an emulsion or granules, soluble in water.

Post-emergence herbicides act only on weeds, they contain several active ingredients:

1. Metolachlor does not pose a danger to insects, but destroys purslane, chamomile.
2. Imazetapir copes with broomrape.
3. Terbutylazine inhibits ragweed but is not toxic to bees and bumblebees.
4. Tribenurol-methyl kills hundreds of species of broad-leaved weeds, removes poppies, radish, can be used together with fungicides.

To accelerate the ripening of sunflower seeds allows the use of desiccants. The chemical agent "Samum 150" is absorbed by stems and leaves, prevents the development of rot, and destroys weeds.

The best preparations for sunflower

Since autumn, the field has been treated with herbicides containing glyphosate. The substance penetrates the cells, destroys the root, cleans the area from sedge, mustard. Selective preparations are used when the weed produces at least 2 leaves. Such products kill individual plants, but do not affect neighboring crops.

Gezagard

The selective drug has a destructive effect on weeds, protects sunflower plantings for a long time. When spraying the herbicide "Gezagard", prometrin, which is contained in its composition, is absorbed by the leaves, absorbed by the roots, which leads to the death of dicotyledonous grasses and cereal annuals. The pesticide decomposes in the ground, is not addictive to weeds, and is safe for insects and people.

Sunflower is sprayed with "Gezard" once a season along with sowing, it consumes 200 liters of solution per hectare. In arid regions, the herbicide is embedded into the ground to a depth of 30 mm.

Gambit

Based on prometrin in the form of a concentrated suspension, a drug is produced that enters through the soil into seedlings and roots of weeds. Herbicide "Gambit" disrupts the production of amino acids in plants, inhibits photosynthesis. Protects sunflower for 2.5 months:

• from field violets and wild oats;
• shepherd's purse and bluegrass;
• from wild radish and amaranth;
• from nettle and dope.

Weeds die in 5-7 days. In order to avoid the development of resistance, the drug is alternated with other pesticides. The product is sold in cans of 10 and 5 liters.

Dual-Gold

Selective herbicide, which belongs to the class of chloracetamides, protects plantings of industrial crops from weeds.A preparation with a high concentration of C-metolachlor prevents seed germination. "Dual-Gold" reduces the production of enzymes, which leads to a decrease in the rate of cell division, to the death of perennial weeds.

The herbicide is buried in the wet ground by 20 mm, the ground part of the plants is sprayed, after which the site is not treated for up to 2 weeks. The tool is not addictive, does not adversely affect the structure of the soil.

"Octopus Extra"

One of the latest developments of scientists kills all representatives of the flora, germinated grasses die forever. Leaves and stems are sprayed with a systemic herbicide, from where the agent, moving through the tissues of the weed, enters the cells of the root system. Plants stop absorbing nutrients and wither. "Sprut Extra" copes with perennials and cereals, which are not affected by many drugs, suitable for pre-sowing treatment of sunflower.

"Target Hyper"

Domestic herbicide, which is used to kill weeds in the fields after emergence, acts selectively and does not harm crops. "Targer Hyper" is produced in the form of a concentrated emulsion, it is used sparingly, but it destroys the ground part and roots of weeds.

Tornado 500

To control weeds, sunflower farmers buy herbicides in large quantities. It is advantageous to purchase chemicals not in small bottles, but in canisters with a volume of 5 or 10 liters. Tornado-500 is packaged in such packaging. The drug contains a high concentration of glyphosate s alt, when sprayed on weeds, it disrupts the production and absorption of substances.

Sticky additives that are added to the emulsion protect it from being washed off by precipitation. After treatment of plants, the composition decomposes in the ground into separate components that do not harm the environment.

Total 360

Preparation containing glyphosate s alt copes with all types of weeds, acts in heat and cold. The active component of the herbicide, penetrating into the tissue of weeds, destroys cellular structures, which leads to the death of the roots.

Processing sunflower fields with "Total-360" is carried out a season a few days before sowing in order to destroy thistle and thistle, wheatgrass and wild oats, bindweed and cereals. On plantings of industrial crops, the drug is used as a desiccant.

Fuselad Forte

A post-emergence herbicide developed by Syngenta does not harm sunflowers, but is dangerous for wheat, rye, and oats. "Fusilade Forte" is used for processing fields at different stages of development of industrial crops, it is effective at a temperature of at least 10 ° C. After spraying, weeds dry out after a week.

Which weed killer is better to choose

Before the emergence of sprouts, sunflower fields are recommended to be treated with contact preparations that destroy metabolism in weed cells. Based on feedback from farmers, at this stage of crop development, it is better to use:

• Dual Gold;
• "Pioneer-900";
• "Nitran";
• Harnes.

When leaves appear on the stems of sunflowers, selective herbicides should be sprayed, which destroy different types of weeds, but do not affect industrial crops.

The most effective means of blocking the re-growth of weeds include Fusilad Super, Gezagard, Beckard 125.

General rules for the use of sunflower herbicides

Before choosing a preparation for the treatment of oilseeds, you need to find out what types of weeds attack the site. Soil herbicides are best for killing annual grass.

It is necessary to spray the compositions on the aerial part of the weeds in the morning or in the afternoon, but not in the heat, since the substances will be less absorbed by the green mass and stems. When spraying weeds, it is necessary to ensure that the solution does not fall on sunflowers. Fields should not be treated with herbicides in windy weather.

The concentration of the drug must be selected in accordance with the annotation, but also take into account:

• type and acidity of soil;
• soil moisture level;
• amount of applied organic matter.

Timely protection against weeds, as well as compliance with the requirements of agricultural technology, guarantees a high yield of sunflower.

Recommended