The whole truth about potato weed herbicides

The whole truth about potato weed herbicides

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When growing potatoes, you can face such an unpleasant phenomenon as growing on the same territory with the sowing of weeds and plants.

Weeds do not have special requirements for growing conditions, so many of them can grow on a potato plantation, competing with potatoes in the struggle for food and moisture.

If we do not control weeds, yield can drop to 55-60%, which is unacceptable.

General information

Herbicides for potatoes - special purpose chemicalsthat help in the destruction of weeds growing in the immediate vicinity of crops.

It is worth noting that they are classified according to some criteria:

  1. By the nature of the impact:
    • selective action that only destroys unwanted plants and herbs;
    • continuous actions that kill all vegetation.

    If the land allocated for planting potatoes is very clogged with rhizomes of plants, then it is necessary to use continuous herbicides. It is recommended to enter them in advance., namely in spring or autumn.

    In addition, continuous herbicides can be applied directly during planting, since their effect lasts a maximum of 14 days, and potato shoots appear on 15-30 days.

    The division of drugs into selective and continuous is a convention, since the selectivity of the chemical can be changed with an increase in dosage, terms and methods of application.

  2. By external signs of action:
    • contact, which infect the plant only in the places of their contact;
    • systemic, which move through the vascular system of the plant and are highly effective for controlling weeds with a massive root system;
    • preparations that, when applied to the soil, destroy the seeds and roots of weeds.
  3. By the time of entry:
    • applied before sowing potatoes (spring, autumn);
    • applied during sowing or immediately after it;
    • weeds and potatoes used during the growing season.

Against weeds

By seedlings

If the land allocated for planting potatoes is very clogged with rhizomes of plants, then it is necessary to use continuous herbicides. It is recommended to make them in advance, namely in spring or autumn.

Besides, solid herbicides can be applied directly at planting, since their effect lasts a maximum of 14 days, and potato shoots appear on the 15-30th day.

After germination

After germination, only selective (selective action) herbicides are allowed on potato fields. The correct dosage will not harm the crop, but will destroy unwanted plants.

After harvest tops remain on the land area, which is also destroyed by herbicides.

Against bindweed

Thanks to powerful roots field bindweed is resistant to many herbicides... Often, after herbicidal treatment, the part of the plant that is above the ground dies off, but after that it grows back.

By the time of harvest, even more contamination of crops by this weed is observed. The fact is that herbicides "awaken" dormant buds, which later give a huge number of shoots.

In the year when the sowing was treated with herbicides, the field bindweed does not form seeds - there is an active accumulation of substances in the root system of the weed. For absolute weed control it is necessary to cultivate the land herbicides for several years in a row.

It is advisable to carry out the treatment after sowing before the emergence of potatoes or after harvesting. Such use of herbicides helps to get rid of not only field bindweed, but also from many perennial weeds. In order to suppress this weed, it is sprayed at the very beginning of the flowering period.

Application methods

  • solid (whole area or sample area);
  • tape (in stripes 20-30 cm);
  • row.

Herbicides are presented in the following forms:

  1. Solutions.
  2. Powders.
  3. Emulsions.
  4. Suspensions.
  5. Aerosols.
  6. Granules.

The form of the herbicidal preparation determines the method of its introduction:

  • spraying;
  • the introduction of granules or a mixture of the drug with fertilizers;
  • dusting;
  • application with water for irrigation.

The timing of drug administration depend on the life phase of the potato, type and life phase of a weed plant, form of herbicide.

For potatoes, herbicides are applied at temperature conditions of + 15 ... + 24 degrees. At lower temperatures, the effectiveness of the product is significantly reduced.

Precipitation that fell within 5-8 hours after treatment also reduces the effect of herbicides. Complete destruction of weeds occurs within 10-15 days after treatment.

When using herbicidal products for potatoes, the following conditions are necessary:

  1. The seed should be at the maximum permissible depth for planting so that the soil preparations do not affect the potato sprouts.
  2. The soil should be loose, lumpy and moist so that the distribution of herbicides occurs evenly.

Do not use herbicides on potato plantations in the following cases:

  • shallow planting of tubers;
  • sowing tubers were exposed to frost;
  • tubers have suffered from pests and diseases;
  • planted potato varieties are highly susceptible to herbicides.


Spraying plants with herbicides is divided into:

  1. Large droplet.
  2. The usual.
  3. Small droplet.
  4. Aerosol.

Spraying a potato plantation is more effective when done in calm weather. Do not use drugs during drought periods or in strong winds.

Also do not exceed the recommended dosage, as the solution begins to drain from the plants. The main method of spraying is the introduction of the drug into the soil using sprayers mounted on ground trailers or agricultural aviation.

Consumption rate

For herbicide preparations of various manufacturers, their own consumption rate corresponds. Here are the most commonly used herbicides for potatoes and their application rates:

  • Roundup - 1.4-4 l / 1 ha;
  • Gladiator - 1.6-4.8 l / 1 ha;
  • Tornado - 2-4 l / 1 ha;
  • Arcade - 4-5 l / 1 ha;
  • Lapis lazuli - 0.75-1l / 1 ha;
  • Racer - 2-3 l / 1 ha;
  • Molbuzin - 0.75 l / 1 ha.

More detailed instructions for use and consumption rates for other drugs are indicated by the manufacturer.

Potato herbicide application - aggressive chemical weed control... Its use can be justified only when other methods have failed to reduce the weediness of plantations to an optimal level.

Basically these funds are classified as chemicals of low and medium toxicity, but still, when working with them, you should observe safety precautions.

Watch the video: Growing Potatoes To Deal With Weeds (August 2022).