The use of herbicides for potatoes against weeds

Weeds develop rapidly, drown out potato seedlings by intensive growth, and also contribute to the spread of pests and fungal spores. To control weeds, herbicides are used for potatoes. Processing potato seedlings with herbicides allows you to save the crop both on a small garden plot and on industrial sown areas.

Application of herbicides for potatoes

Herbicide Varieties

All herbicides for the destruction of potato weeds are divided into 2 groups, depending on their impact.

Contact herbicides

Such external preparations affect only the leaf part and the stems of the plants, where they fall during the spraying process, causing the destruction of their aboveground part.

Contact herbicidal preparations for potato crops are used in the fight against annual and biennial weeds, for example, against a shepherd’s bag or wood lice with bindweed.

Herbicidal agents are used in the absence of precipitation. They show the best results if they were used in calm weather without drought and a sharp drop in temperature.

Among the most common contact herbicidal agents that are actively struggling with field bindweed and wood lice, Titus, Tornado and Roundup are distinguished. A working fluid with such preparations is prepared in a proportion of 40 to 120 ml of a herbicidal agent per 10 liters of water. The leaf part of plants needs to be sprayed in the morning and evening twice a day. After spraying, potato bushes are not watered and do not spud for 3-5 days.

Systemic herbicides

Systemic herbicides for potatoes of internal action are effectively used against wheatgrass and Cirsium. With the ability to penetrate into the vascular system of the plant and when freely moving in the cells, such herbicidal agents lead to the death of both parts: both aboveground and underground.

The most well-known systemic herbicidal agents after germination include the Titus preparation, which penetrates the cells through the leaves treated by it, reaching the root system and shoot area.

Herbicide Area

Depending on how potato herbicide is able to clean the area from weeds, continuous and selective herbicides are isolated.

Continuous herbicides

Continuous herbicidal agents are capable of destroying all plants growing on the sown area, that is why agricultural engineers in industrial production often call them general-consuming.

A continuous action herbicide, for example, Zenkor, can destroy the outer protective shell, causing the death of plants.

Continuous herbicidal preparations are dangerous not only for weeds, but also for the cultivated plant itself, therefore, industrial agriculture uses this type of chemical means with restrictions, using it only when preparing the sown area before planting vegetables and, if necessary, completely clear it of all vegetation. The use of solid herbicides in personal plots is not recommended. Subject to their use, it is advisable to process the beds in a strictly defined off-season: in the early spring, before planting a potato crop, or in the fall after the harvest.

Such strong herbicidal compositions are not used after potato seedlings. Among the dangerous chemistry, which is used only for emergence of sprouts or during direct planting, “Zenkor” and “Arsenal”, capable of killing all vegetation, are distinguished.

Selective herbicides

Selective action herbicides are dangerous for a particular kind of weed with a selective spectrum. Among them are:

  • broadly selective, able to deal with a certain type of plant, for example, destroy dicotyledons without affecting monocotyledons;
  • narrowly selective, affecting only selected varieties within one species, for example, the Grodil herbicidal chemical destroys bedstraws in the family of cereals, but is completely safe for barley.

Herbicides can also destroy potatoes

Selective herbicidal agents that destroy certain families of weeds can also be continuous with an increase in their concentration of working solutions.

Among the most common herbicides of selective action, Zenkor and Lazurit are distinguished.

Mode of application

According to the methods of application, soil and leaf herbicidal preparations are distinguished.

Soil herbicides

Soil (pre-emergence) herbicidal agents are used by treating the soil until the emergence of potato seedlings or before planting a vegetable crop in the soil.

The use of pre-emergent herbicidal agents is a toxic measure for weed seeds, without giving them growth and development. For potato root crops, active substances of pre-emergence herbicides that do not move in the soil are not dangerous, but provide them with reliable protection.

A number of soil herbicidal chemicals form a protective film on the surface of the soil layer, when the sprouts come into contact with it, the weed is killed.

Usually pre-emergence herbicide is a granular agent applied to the soil to a depth of 5-10 cm. Chemical preparations for the destruction of weed plants Roundup, Boxer and Centerion are among the most well-known.

Leaf herbicides

Leaf (post-emergence) herbicidal agents enter the plant by spraying and exert an effect on the leaf part and stems. The use of post-emergence preparations is carried out after the appearance of potato seedlings. It is recommended to use the herbicides "Lazurit" and "Antiburyan", which are treated with an interval of 10 days, but no more than 3 times during the garden season.

Post-emergence processing of potato crops from weeds occupies one of the leading positions among private gardeners.

Post emergence treatment

Processing potato bushes with leaf herbicides after emergence is one of the most common weed control methods for growing vegetables. Post-emergence weed herbicides for potato seedlings are applied by spraying. In the homestead economy these are sprayers.

When preparing liquids with herbicides, softened water and non-metallic containers are used so as not to provoke chemical reactions and not reduce the effectiveness of the drug.

Working herbicidal compositions are prepared before use. The shelf life in a cool dark place in a container of plastic or glass does not exceed 7 days.

When post-emergence processing of potatoes, one should remember simple rules:

  • the earth mound remaining after weeding must settle before spraying,
  • the soil structure should contain small lumps, allow the herbicidal agent to be evenly distributed,
  • soil moisture indicator should be within 80%,
  • good efficacy among preparations for post-emergence processing of potatoes is possessed by those containing prosulfocarb or metribuzin, for example Lazurit.

The processing of potatoes by leaf herbicides is not carried out in relation to varieties that are sensitive to chemical preparations. To reduce the chemistry content in them, it is recommended that they choose the correct dosage of herbicides and alternate their use with manual weeding.


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