Chemical Category

• Common Name: Clodinafop-Propargyl
• Chemical Name (IUPAC): (R)-2-[4-(5-chloro-3-fluoro-2-pyridyloxy)phenoxy]propionic acid, prop-2-ynyl ester
• Chemical Formula: C₁₇H₁₃ClFNO₄
• CAS No.: 105512-06-9
• Chemical Family: Aryloxyphenoxypropionate (FOP) herbicide
• Type: Post-emergence selective systemic herbicide

 Mode of Action

• Inhibits the enzyme Acetyl-CoA Carboxylase (ACCase) — essential for lipid synthesis in grasses.
• This inhibition stops fatty acid biosynthesis, disrupting cell membrane formation in susceptible weeds.
• Causes growth inhibition, chlorosis, and death of grass weeds while being safe to broadleaf crops (e.g., wheat).
• Absorbed through leaves, translocated to meristematic regions (growing tips).

Applications

• Used as a post-emergence herbicide for controlling annual and perennial grass weeds in wheat and other cereal crops.
• Applied 25–35 days after sowing (DAS), when weeds are in the 2–4 leaf stage.
• Formulations available: 15% WP, 9% EC, 12% EC, and combination products with Metsulfuron or Fenoxaprop.

Weeds Controlled

• Clodinafop-Propargyl effectively controls a wide range of grass weeds, including:

Technical Overview

• Physical Form: Crystalline solid or powder
• Color: White to light brown
• Purity (Technical): Minimum 95% w/w
• Solubility: Insoluble in water, soluble in organic solvents (xylene, acetone, toluene)
• Melting Point: 47–49°C
• Vapor Pressure: Very low (stable)

Main Uses

• Crop: Wheat (main crop), Barley, Oats (in some regions)
• Purpose: Control of grassy weeds selectively, ensuring clean crop stands.

Storage and Stability

• Store in cool, dry, well-ventilated area away from sunlight and moisture.
• Keep in original sealed containers.
• Avoid storage near food, feed, or strong oxidizing materials.

Stability:

• Stable for minimum 2 years under normal conditions.
• Avoid alkaline pH solutions — hydrolysis occurs under high pH (>8).