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Zontran, CSC

Zontran, CSC

Metribuzin 250 g/l

New standard of protection!

Selective pre-emergence and post emergence herbicide intended to control annual bilobate weeds and cereal weeds on potato, tomato and soybean plantings.

General information


  • highly effective at reduced concentration of the active ingredient due to innovative preparative form CSC;
  • most efficient herbicide based on metribuzin for potato and tomato protection;
  • high bio-activity at consumption rates of the active ingredient reduced by 1.4 to 1.7 times per ha compared to similar dry metribuzin based preparations;
  • ‘screening effect" to prevent emergence of weeds:
  • better penetration into the plant;
  • reduced pesticide load and cost of treatment;
  • mix stability;
  • the preparation contains bioactivator;
  • timely ravage of weeds with Zontran reduces the risk of buck eye rot on potato plantings.

Preparative form

Colloid concentrate solution-containing metribuzin 250 g/l.

Transport and storage conditions

Comply with all conventional rules of toxic and explosive substance transport. Keep the preparation in a room dedicated for pesticide storage. Storage temperature range - minus 10⁰C to plus 30⁰C. Stir before use.

Shelf life

Shelf life: 2 years.

Hazard class

Hazard class III, moderate hazard.


5 liter PE container


Schyolkovo Agrokhim JSC, Russia.


Schyolkovo Agrokhim JSC, Russia.


Mechanism of action

The mechanism of action is based on inhibiting transport of electron s involved in photosynthesis. The preparation moves in an acropetal manner. The active ingredient is easily absorbed by roots and rootlets of plants, but may also penetrate through leaves.
The preparative form - colloid solution concentrate - allows fast metribuzin penetration into the plant and good preparation adhesion to the leaf. This makes the preparation bio-efficient at a reduced mertribuzin dose.

Protective period

The preparation effectively suppresses rootlets of vegetating seeds and defers the second way of weeds. The preparation frees plantings from weeds for 1 month depending on weather conditions during the vegetation period.

Speed of action

Weeds cease growing as soon as these are treated with the preparation. Visible signs of exposure appear in 2 to 7 days, and weeds perish in 10 to 15 days after treatment.

Spectrum of action

Annual bilobate and cereal weeds

Sensitive species: bluebottle, speedwell (species), knotweed (species), charlock, tansy mustard, sheep bur, common fumitory, bur grass (species), satin, spring groundsel, pigweed (species). copper rose, loose silky bent, milkweed (species), rough-stalked bluegrass, oat grass, dandelion (species), caseweed, hemp nettle (species), ryegrass (species), wild radish, chamomile (species), crabgrass, bladder campion, sandweed, foxtail (species), amaranth (species), day-nettle.

Moderately sensitive species: Canadian thistle, velvetleaf, foxtail, field scorpion grass, sow thistle (species), houndsberry, common purslane, field chamomile, quack grass, sorgho (species), field pansy, dish mustard.

Feebly sensitive species: ragweed, catch weed.


Compatible with most herbicides, fungicides, and insecticides applied to agricultural crops. In each specific case, especially when mixed with microfertilizers, the components to be commingled shall be checked for physical and chemical compatibility.

Potential for resistance

No cases of weed resistance to the preparation are recorded.

Usage regulations

Crop / object of treatment

Harmful plants

Consumption rate (preparation/mix), l/ha

Method, time and conditions of application.
Application time for manual (machinery assisted) operations

Wait time (application frequency)


Annual bilobate and cereal weeds

1+ (0.4-0.6)/200-300

Treatment of vegetating weeds before crop emergence and further treatment as tops become as high as 5 cm.



Treatment as tops become as high as 5 cm.


Seed tomato (field-seeded)


Planting spraying successively at 1-2 crop leaves stage and 2-4 crop leaves stage.



Spraying of plantings at 2-4 crop leaves stage


Transplanted tomato


Treatment of weeds in 15 to 20 days after transplantation



Soil treatment before crop emergence

Application technique. Mix preparation method
Stir before use.
Prepare the mix immediately before use. Fill the sprayer tank with water to 3/4 of its volume, slowly add the entire preparation dose while stirring, and rinse the container with preparation remainders several times with water. Pour water after rinsing the preparation container to the sprayer tank and top up with remaining water until full while continuously stirring.
Prepare the mix and fill the sprayer on dedicated sites that are disinfected afterwards.
Use ground-based beam sprayers OPSh-15-01, OPSh-3-24, ON-400, OP-2000-2-01, or similar.
Max. mix concentration – 0.5% of preparation.
The best result and quickest herbicide action of the preparation are achieved by:

  • treatment at earlier stages of weed growth;
  • under favorable growth conditions (optimal humidity and temperature).

If recommendations on preparation application timing and rates are met, no adverse effect on crops is noted. In specific cases, signs of phytotoxicity may be visible during the first days after application, but these do not affect further crop development. Plantings shall not be treated that the crop is under stress (drought, overwatering of heavy soils, plantings attacked by diseases or pests).

Recommendations on protection of valuable flora and fauna objects
The preparation is of low hazard to bees and fish – Hazard Class 3.
Basic provisions of the ‘Guidelines for preventing bee poisoning with pesticides’ and following environmental regulations:
treat plants at wind speed up to 4 or 5 m/sec;
protection boundary zone for bees – min. 1-2 km;
bee’s flight time limitation – 5-6 hours.
Warn apiary owners 4 or 5 days before treatment.

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