Active ingredient

Monolinuron

Description

Monolinuron is a selective herbicide belonging to the urea chemical class. It is widely used in modern agronomy for the control of a broad range of annual broad-leaved and some grass weeds. As a potent active ingredient, it provides reliable protection for various crops during critical growth stages by inhibiting weed competition.

The primary mechanism of action for monolinuron involves the inhibition of photosynthesis. Upon application, the substance is absorbed by the roots and foliage of target weeds. It effectively blocks electron transport within photosystem II, which leads to the cessation of vital metabolic processes, causing the plant to wither and eventually die within a few days.

This herbicide is frequently applied to crops such as potatoes, carrots, and onions. It is typically used as a pre-emergence or early post-emergence treatment. Success with monolinuron depends heavily on precise timing and soil conditions, as the herbicide must be distributed evenly to achieve consistent control without causing phytotoxicity to the desired crop plants.

Soil texture and moisture content play a significant role in the efficacy of monolinuron. The substance works most effectively in soils with moderate moisture levels and organic matter content. Agronomists often advise adjusting dosage rates based on the specific soil type and weed spectrum present in the field to optimize performance and cost-effectiveness.

Safety remains a top priority when handling monolinuron. Users must adhere to all label instructions, including the use of protective equipment like gloves, eye protection, and specialized clothing. Furthermore, it is essential to implement drift reduction techniques to protect surrounding environments and water sources from potential contamination during the spraying process.

  • Chemical class: Phenylurea derivative
  • Mode of action: Photosynthesis inhibitor (PS II)
  • Application type: Pre-emergence / Post-emergence
  • Target: Annual broad-leaved weeds
Regulatory

Status in the European Union

Not approved in the EU

CAS number
1746-81-2
Category (EU)
HB - Herbicide
ADI
0.003 mg/kg bw/day
Hazard classification (CLP)
Acute Tox. 4 - H302Aquatic Acute 1 - H400Aquatic Chronic 1 - H410STOT RE 2 - H373
EU legislation

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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