Active ingredient Especially harmful

Chlormequat chloride

Description

Chlormequat chloride is a well-known plant growth regulator belonging to the quaternary ammonium compounds class. It serves as a classic retardant in global agriculture, specifically designed to modulate the growth architecture of cultivated plants.

The primary mechanism of action involves the inhibition of gibberellin biosynthesis within the plant. By blocking these growth-promoting hormones, the substance effectively reduces internode length and increases stem diameter, which significantly decreases the risk of crop lodging.

Its application is primarily focused on cereal crops, including winter and spring wheat, rye, and oats. In addition to strengthening the stem, it is often employed to promote a more uniform crop canopy and to enhance root development, which supports overall yield stability under varying environmental conditions.

Successful application requires precise timing, typically during the early stem elongation stage. Agronomists emphasize that applying the product during periods of heat, drought, or extreme cold can result in stunted growth or phytotoxic damage, so monitoring weather forecasts is essential for safe usage.

  • Wear appropriate personal protective equipment (PPE).
  • Prevent drift to non-target crops.
  • Avoid application in windy conditions.
  • Ensure equipment is calibrated correctly for uniform coverage.

Safety precautions must be strictly followed, as the substance can be irritating to skin and eyes. Operators should avoid inhalation of the spray mist and ensure that mixing areas are well-ventilated, adhering to all local regulations regarding the storage and disposal of agrochemical containers.

Regulatory

Status in the European Union

Approved in the EU

CAS number
7003-89-6
Approved from
01.12.2009
Approval until
28.02.2027
ADI
0.04 mg/kg bw/day
ARfD
0.09 mg/kg bw
AOEL
0.04 mg/kg bw/day
Hazard classification (CLP)
Acute Tox. 4 - H302Acute Tox. 4 - H312

Regulatory status data: EU Pesticides Database © European Union, CC BY 4.0. EU status is for reference only and does not replace national registration in your country.

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