Flufenacet 41% SC Herbicide | Pre-Emergent Weed Control for Cereals and Oilseeds

Flufenacet 41% SC (Suspension Concentrate) is a premium pre-emergent herbicide designed for broad-spectrum control of annual grasses and some broadleaf weeds in wheat, barley, canola, and other winter crops. As an acetamide herbicide, it inhibits lipid biosynthesis in germinating seedlings, preventing root and shoot development. The 41% SC formulation (410 g/L flufenacet) offers superior suspension stability and uniform soil coverage, making it a cornerstone in integrated weed management (IWM) programs for cool-season crops.

Technical Specifications

Parameter	Details
Active Ingredient	Flufenacet (CAS No. 142459-58-3)
Chemical Class	Acetamide
Mode of Action	Inhibits long-chain fatty acid synthesis (HRAC Group 15)
Formulation Type	41% SC (410 g/L active ingredient)
Appearance	Off-white flowable suspension
Solubility	0.12 mg/L in water (20°C)
pH Range	5.5–7.5
Density	1.05–1.10 g/cm³

Mode of Action

Soil-Mediated Uptake:
- Absorbed by germinating seedlings through roots and coleoptiles.
Biochemical Inhibition:
- Blocks acetyl-CoA carboxylase (ACCase), preventing fatty acid synthesis for cell membrane formation.
Symptom Progression:
- 5–7 days: Stunted root growth and failure to emerge
- 10–14 days: Cotyledon chlorosis and seedling death

Application Guide

Crop	Target Weeds	Dosage (g ai/ha)	Application Timing
Wheat/Barley	Wild oats, ryegrass, blackgrass	500–700	Pre-emergent (0–3 days after sowing)
Canola	Wild mustard, shepherd’s purse	600–800	Pre-emergent (before crop emergence)
Sugarbeet	Chenopodium, foxtail	400–600	Pre-plant incorporated or pre-emergent

Application Best Practices

Water Volume: 200–400 L/ha for soil incorporation
Adjuvants: Add non-ionic surfactant (0.2% v/v) for improved soil adsorption
Tank Mixes:
- With metribuzin for broadleaf weed control in canola
- With diflufenican for enhanced grass control in wheat
Soil Conditions: Apply to moist, well-prepared soil (10–20 mm moisture); avoid compacted or dry soils

Key Advantages

Broad-Spectrum Grass Control:
- Effective against 30+ grassy weeds, including herbicide-resistant biotypes (e.g., wild oats, blackgrass).
Long Residual Activity:
- Provides 4–6 weeks of soil residual control, reducing early-season weed pressure.
Crop Safety:
- Selective in wheat, barley, canola, and sugarbeet when applied pre-emergent.
Low Volatility:
- Minimizes drift risk to neighboring crops.
Environmental Profile:
- Low mammalian toxicity (LD₅₀ > 2000 mg/kg); rapid soil degradation (DT₅₀ 14–28 days)

Safety & Environmental Notes

Toxicity:
- Moderate toxicity to fish (LC₅₀ 1–10 mg/L); maintain 100 m buffer from water bodies.
- Low toxicity to birds (LD₅₀ > 2000 mg/kg).
Environmental Fate:
- Soil-bound with low leaching potential; degrades via microbial action.
Storage: Store at 5–30°C, protected from sunlight and freezing.

Packaging & Compliance

Standard Packs: 1L, 5L, 20L HDPE containers
Custom Solutions:
- Private labeling with multilingual instructions
- Regulatory support for global markets (EPA, EU, APAC)
Shelf Life: 3 years under recommended storage conditions

FAQ

Can Flufenacet 41% SC control broadleaf weeds?
Controls some broadleaf weeds (e.g., Chenopodium), but performance is optimized for grasses. Tank-mix with broadleaf herbicides for full-spectrum control.
What is the pre-harvest interval (PHI)?
- Wheat/Barley: 60 days
- Canola: 45 days
- Sugarbeet: 90 days
Is it compatible with liquid fertilizers?
Yes, but conduct a jar test first. Avoid mixing with high-N solutions (>2% N).
How to manage resistance in wild oats?
- Rotate with Group 2 (ALS inhibitors) or Group 1 (ACCase inhibitors).
- Use in combination with cultural practices (e.g., delayed sowing).
Can it be used in no-till systems?
Yes, apply before crop emergence with sufficient soil moisture for activation.

Field Performance

Wheat Trials in Europe:
600 g ai/ha controlled 92% of wild oats and blackgrass, increasing wheat yield by 1.2 t/ha.
Canola Trials in Canada:
700 g ai/ha + metribuzin reduced weed density by 90%, improving canola oil content by 3%.