Acifluorfen 214g/L SL Herbicide | Selective Post-Emergence Weed Control

Technical Specifications

• Active Ingredient: Acifluorfen (CAS No. 50594-66-6)
• Molecular Formula: C₁₈H₁₄ClF₃O₇S
• Molecular Weight: 478.82 g/mol
• Mode of Action: Inhibits protoporphyrinogen oxidase (PPO), generating reactive oxygen species (ROS) that damage cell membranes.
• Formulation: 214g/L SL (Soluble Liquid)
• Target Crops: Soybeans, cotton, peanuts, dry beans.
• Target Weeds:
  • Annual Broadleaf: Pigweed, lambsquarters, velvetleaf, morningglory, ragweed.
  • Perennial Broadleaf: Bindweed, Canada thistle (suppression).

Mode of Action

1. Foliar Uptake: Rapidly absorbed by weed leaves, translocating to meristematic tissues.
2. PPO Inhibition: Blocks protoporphyrinogen oxidase, halting chlorophyll synthesis.
3. Oxidative Stress: Accumulation of porphyrins leads to singlet oxygen production, causing lipid peroxidation.
4. Symptom Progression:
   • 6–12 hours: Light-dependent leaf bleaching.
   • 1–2 days: Necrotic lesions at leaf margins.
   • 5–7 days: Complete plant death.

Application Guide

Application Tips:

• Water Volume: Use 200–400 L/ha for uniform coverage.
• Adjuvants: Add non-ionic surfactant (0.25% v/v) to enhance uptake.
• Temperature: Avoid spraying above 28°C to minimize crop stress.
• Rainfastness: 4–6 hours post-application.

Key Advantages

1. Fast Action: Visible weed control within 24 hours, ideal for late-season infestations.
2. Broad Spectrum: Controls 20+ broadleaf weeds, including glyphosate-resistant biotypes.
3. Tank Mix Compatibility:
   • Common Mixes: Glyphosate, s-metolachlor, chlorimuron-ethyl.
   • Synergy: Enhances control of resistant weeds (e.g., Palmer amaranth).
4. Crop Safety: Selective in soybeans and cotton when used at labeled rates.
5. Residue Profile: Short soil half-life (7–14 days), minimal rotational crop restrictions.

Safety & Environmental Notes

• Toxicity: Low mammalian toxicity (LD₅₀ > 2000 mg/kg); highly toxic to aquatic organisms.
• Environmental Impact:
  • Avoid application near water bodies; risk of fish kills.
  • Degrades via photolysis and microbial action.
• Storage: Store at 5–35°C; protect from freezing.

Resistance Management

• HRAC Group: 14 (PPO inhibitors).
• Strategies:
  • Rotate with Group 2 (ALS inhibitors) or Group 15 (VLCFA inhibitors).
  • Tank mix with herbicides of different modes of action (e.g., glyphosate).

FAQ

1. Can Acifluorfen be used in organic farming?
   No; synthetic herbicide prohibited in organic systems.
2. How does it affect rotational crops?
   Wheat, corn, and sorghum are tolerant; sensitive crops (e.g., vegetables) may require 6+ months.
3. Is Acifluorfen effective against waterhemp?
   Yes, but tank mix with glyphosate for resistance management.
4. Can it be applied through chemigation?
   No; approved for foliar application only.
5. What is the pre-harvest interval (PHI)?
   45 days for soybeans, 60 days for cotton.

Packaging & Applications

• Standard Packaging: 1L, 5L, 10L HDPE containers.
• Real-World Case Studies:
  • Midwestern Soybeans: 0.75 L/ha + glyphosate controlled 95% of pigweed and lambsquarters.
  • Cotton Fields in Texas: 0.5 L/ha + s-metolachlor reduced weed pressure by 80% through season.