When and which corn herbicides are best used
During the growth and development of any plant, weeds must be removed in a timely manner. Herbicides for corn are especially needed when the plantation is large and manual treatment is not possible. In order for the herbicide to be effective, you need to choose and use the drug correctly.
How corn herbicides work
Annual cereals grow in maize crops: gray bristles, barnyards. Among the dicotyledonous weeds, there is a tenacious bedstraw, white gauze, upturned amaranth. They develop in different periods, so the treatment must take place in several stages, so that the herbicide used for corn affects all types of weeds.
Herbicides are widely used in agriculture to destroy unwanted vegetation. As a rule, they are used on large areas, where there is no way to handle it manually. The drugs have a different composition, respectively, the scope and methods of exposure are also different.
Before starting treatment, keep in mind that one herbicide may not be suitable for all varieties of corn. Therefore, before buying the drug, you need to clarify which herbicide is best used on a certain type of corn.
If all agrotechnical measures are carried out correctly, then from 1 hectare you can get at least 6 tons of corn. However, weeds often interfere with such plans. They are highly resilient and difficult to control. Maize herbicides cannot remove all weeds completely, but can be controlled by keeping them below the economic threshold.
If the weed is not destroyed at a certain stage, it will begin to compete with crops for moisture, nutrients in the soil, light, which will ultimately lead to a drop in yield.
In a large cropped area, corn soil herbicides are the most effective way to control weeds.
Features of the use of herbicides
Before purchasing the drug, you need to have an idea of the type of weed growing in corn, the features of its development. This will make it easier to choose an effective remedy.
It should be understood that different types of weeds are formed at one time. Some grasses appear in the spring, others during the summer and fall. Annual herbs can be destroyed in one go, and perennials require two applications of the drug.
It is necessary to take into account the methods of reproduction. For example, horseback and rape propagates by seeds, and loach and sow thistle - by rhizome. That is why it is difficult to withdraw them the first time.
The rules for processing corn depend on the type of herbicide chosen. However, there are general guidelines:
- the soil must be moistened and loosened before using the product;
- the use of herbicides is excluded under adverse weather conditions - strong wind, rain, low temperature;
- when applying the drug after germination, you need to wait for 3-5 leaf plates to appear.
Some of the active substances of the drug penetrate into the ear itself.It is forbidden to use herbicides one month before harvest.
High efficiency is provided by the use of the drug on the leaves, but in the case of the simultaneous use of additional agents that improve the fixation of the solution on the leaf plates. Otherwise, most of the herbicide will not work.
Types of herbicides for corn
Most chemicals for killing weeds in corn are classified as pre-emergence and post-emergence.
Pre-emergence herbicides for corn are used before weeds appear on the field. They are used almost immediately after planting the crop and their purpose is to prevent the emergence of weeds.
Treatment with such herbicides is carried out immediately after planting. It helps prevent the germination of weed seeds. This saves weeding time and protects the crop for a period of time until harvest. They are used to prevent the growth of weeds.
Post-emergence corn herbicides are used in the growth of weeds and can be selective or non-selective.
Selective herbicides control a specific type of weed, while non-selective herbicides have a broader spectrum of action and kill all types of weeds. In the case of corn, a selective broadleaf herbicide is used because the crop is classified as a herb. This is why any chemical solution used must be grass-friendly but harmful to broadleaf weeds.
During application, you must follow all the rules that are specified in the instructions. It is important to choose a preparation for specific tasks - before emergence, or after the formation of weeds. Processing should be done in the early morning or late evening.
The solution must be prepared in accordance with the indicated dosage, which is prescribed in the manufacturer's instructions. Processing should be done in calm weather, but if the wind is not strong, then it should not be sprayed in the direction of the wind.
Any herbicide can be toxic to humans. It is important to carry out processing using all the necessary precautions. Before preparing the working solution, you should protect your hands with gloves, your eyes with glasses, your body should be completely covered with clothes. A respirator is desirable.
If a chemical comes into contact with the skin or mucous membranes, immediately rinse the area with warm running water. If the solution comes into contact with the eyes, an ophthalmologist consultation is necessary
The best herbicides
The maize herbicides Meister and Meister Power are very popular. These are complex preparations of a wide spectrum of action. They successfully control all types of weeds in crops. The preparation contains foramsulfuron, thiencarbazone, iodosulfuron-methyl sodium. The drug is available in containers of 5 liters.
Herbicide Mais is a post-emergence drug. It is used to control cereal and dicotyledonous weeds. It is a dry, flowable suspension. The active ingredient is rimsulphoron. Release form - plastic 500 g. Protects the crop from weeds throughout the vegetative period.
The herbicide Acenite is used on heavy soils, it is a selective preparation with selective action. The form of the product is a liquid emulsion. It is applied before germination. Compatible with other drugs. To clear crops from weeds, one treatment is enough. The active substances actively penetrate deep into the soil and act on plants that have not yet appeared, destroying them at the cellular level.