About the farm

Instructions for use of the drug Zenkor on potatoes


Among the many existing herbicides to choose the right is not easy. Such is Zenkor, a chemical safe for humans, containing metribuzin. It has a selective effect, that is, deadly for weeds, but harmless for potatoes and other crops. Consider the order of instructions on the use of herbicide.

Instructions for use

The application of the drug is carried out any hand sprayer. Protecting against airway is possible, but not necessary.

The better sprayer you have, the easier it will be to apply the drug.

Zenkor is easy to use, as it does not require special preparation of potato root vegetables before processing. Planting takes place in the usual manner - preparing the ground, cutting furrows and planting tubers.

Multiple use of the drug during one garden season, which takes place in the form of several stages, is allowed and encouraged.

Pre-emergence treatment

The first stage of processing should take place 2-3 days before the potato shoots. At this time, dicotyledonous weeds should have already germinated, the height of the shoots must be at least 2 cm.

Chemical dosing directly depends on soil quality, we try to adhere to the following recommendations:

  • Light soil (black soil) - up to 0.6 l / hectare.
  • Average soil (podzol) - up to 0.75 l / hectare.
  • Heavy soil (clayey) - up to 1.2 l / hectare.
The effectiveness of the treatment Zenkorom positively affects the soil moisture. Well, if a few hours before watering was a little rain.

Immediately after applying Zencor, a thin protective film is formed on the soil surface. It additionally prevents the germination of new shoots of weeds, it is recommended to keep it as long as possible.

Better for that refrain from loosening the soil and sprinkling (watering from a hose).

Post-harvest treatment

This stage can be started approximately 2 weeks after the first one. It is more convenient to focus on the height of potato sprouts - plants should reach at least 5 cm. The consumption of the chemical is less than at the pre-emergence treatment stage:

  • Light soil (black soil) - up to 0.5 l / hectare.
  • The average soil (podzol) - up to 0.6 l / hectare.
  • Heavy soil (clay) - up to 0.8 l / hectare.
The processing of potatoes by Zenkor is strictly forbidden during the day, while the sun is at its zenith.

Important correctly withstand the term of the second processing. The action of the drug should continue until the time when the complete closure of the tops of the leaves will occur, which will complicate the development of the second wave of weeds.

How to make a mixture

To prepare a chemical-based mixture in the form of granules, you need to add 15 grams of powder to 5 liters of water, and more complete dissolution takes 30 minutes. For a liquid variety, the flow rate is 7-11 ml per 5 liters of water.

Buying a herbicide with a margin is not worth it - the shelf life of Zenkara from the moment of release is 3 years. Try to store in original packages at a temperature not higher than 40 ° C.

The drug needs dosingwhich depends on the nature of the soil. The easiest way to carry out dosing at the stage of irrigation is to prepare the mixture according to the above recipe, but to regulate the volume of the used chemical during soil treatment.

The approximate consumption of Zenkor depending on the soil is given below.

Early potato varieties

Zenkor can be used on all, without exception, varieties of potatoes. However, for the treatment of plantings of early and super early varieties, it is necessary to carefully approach the dosing of the chemical.

Fully refuse pre-emergence treatment recommended in case of cultivation of the following varieties:

  • Alyona.
  • Ariel.
  • Riviera.
  • Bellaroza.
  • Lark
  • Karatop.
Leaf chlorosis - one of the examples of side effects from the use of herbicide

It is extremely rare, however, there are cases of slowing down the photosynthesis of potato sprouts after they have been irrigated with a herbicide. In this case, the disease is observed in the form of mild chlorosis, leaf color slows down, the plant develops more slowly.

Cultures on light, sandy soils are most at risk.

What is the herbicide Zenkor

Zenkor - a chemical drug to combat dicotyledon broadleaf and annual cereal weeds. Refers to selective herbicides, that is, selective action - does not harm the cultivated plants.

Due to its relatively low cost, it is especially widely used for tillage for planting potatoes, but it can also be used for treating soil for tomatoes, carrots and other crops.

At its core, Zencore has metribuzin, a widely used active ingredient in a variety of fertilizers. It has a long lasting effect, as it dissolves extremely slowly in water, remains in the soil for up to 3 months.

For many, the safety of the herbicide for bees will be a plus

Completely safe for insects, including bees. Zenkara element saturation is very high:

  • In liquid form - 600 g / l;
  • In the granules - 700g / kg.

It is important that the resistance to metribusin is not formed in the harmful plants, so that its effectiveness remains at the same level every season.

Operating principle

The effectiveness of the herbicide is high due to its complex effects on weeds - as through the leaves of plants (prevents photosynthesis), and not yet sprouted shoots in the soil.

Repeated germination is also prevented by a film appearing on the surface of the earth, which is maintained under favorable conditions for up to 2 weeks.

In the case of monocots weeds need to focus on the development of sprouts. This can be determined by eye - when first tilling the soil, the harmful plants must be in the vegetative developmental stage, have a couple of shaped leaves.

Soil on the bed should be settled - penetration of the herbicide into the soil is harmful, as it prevents the formation of a film on the surface.


Zenkor differs from other herbicides in ease of use. All varieties have the following benefits:

  • Pre-dissolution is not necessary.
  • Effective consumption.
  • Spray filters remain clean.
  • Complete dissolution of the granules no draft.
  • No chemical smell.
  • Convenient to dose.
  • Liquid species is a good base. for the manufacture of tank mix.

The chemical is completely safe for health. Complications from direct contacts are extremely rare. If they occur, it is recommended to seek medical attention.


Unfortunately, the drug is not without flaws. These include the inefficiency of the remedy in some types of soil, for example, light, the saturation of which with humus is less than 2%.

Also Zenkor is not suitable for beds, functioning on the principle of circular crop rotation with a change of plant crops each season. The reason is chemical incompatibility with some garden plants, eg:

  • Onions, lettuce, garlic.
  • Peppers.
  • All kinds of cabbage.
  • All kinds of melons.
  • Beet.
  • Rape.
The disposal of chemical waste is a technically difficult process. In the case of extremely small quantities, follow the elementary rules: dispose of residues of the herbicide only in a deep hole at a distance from water.

In addition, the disposal of Zenkor’s residues or tare from it requires compliance with a number of conditions:

  • It is necessary to build underground burials in a remote place.
  • It is forbidden to make burials near water bodies.

Types of Zenkora

The drug has been used for a long time by growers in many countries, its effectiveness has been widely recognized.

A common type of chemical Zenkor WG 70 produced in the form of granular powder.

Replaced the outdated form of release Zenkora came new. To date, new species have spread: Zenkor Ultra and Liquid. Their difference in the improved composition.

Preparative form is different - both products are available in powder or liquid suspension concentrate. The latter has the following advantages in comparison with the powder:

  • Less long process of breeding the mixture.
  • Improved stability of the solution.
  • The absence of any sediment in the container.

The composition of chemicals, depending on their subspecies, is no different, as well as their effectiveness. Supplied by Zencore in various containers:

  • Powder bags - 20 g.
  • Bottles - up to 100 ml.
  • Tanks - up to 5 liters.

Packages of greater capacity are used for processing large farms, small - for home gardens.

Compatibility with other means

Zenkor successfully used in the preparation of mixtures with the addition of a pesticide. Nevertheless, it is incompatible with some types of fertilizers, it will be useful to remember the following tips:

  • Prohibited apply herbicide together with any nitrogen fertilizer.
  • Mix carefully with insecticides.
  • When mixed with sulfonylurea complied special order of adding ingredients - Zenkor is mixed in the last place and in the already present mixture.

It is recommended to use the drug in conjunction with the products of the manufacturer.

Zenkor can be successfully applied in any climatic conditions and on most soils. Value for money makes it one of the most effective herbicides from existing.