Fenoxaprop 10% EC: Selective Grass Herbicide for Cereal Crops

Fenoxaprop 10% EC (Emulsifiable Concentrate) is a selective post-emergent herbicide designed for controlling annual and perennial grassy weeds in wheat, barley, rice, and other cereal crops. Belonging to the aryloxyphenoxypropionate (AOPP) herbicide family, it inhibits acetyl-CoA carboxylase (ACCase), a key enzyme in lipid biosynthesis, leading to weed growth arrest and death. The 10% EC formulation (100 g/L fenoxaprop-P-ethyl) offers excellent emulsification and uniform foliar coverage, making it a staple in integrated weed management (IWM) programs.

Active Ingredient & Formulation

Chemical Name: Fenoxaprop-P-ethyl (CAS No. 71283-70-4)

Chemical Class: Aryloxyphenoxypropionate (ACCase inhibitor, HRAC Group 1)

Molecular Formula: C₂₆H₂₂ClNO₄

Formulation Type: Emulsifiable Concentrate (EC)

Physical Properties: Yellowish-brown clear liquid, soluble in organic solvents, pH 5.5–7.5, density 1.05–1.10 g/cm³.

Mode of Action

Foliar Uptake & Translocation:

- Rapidly absorbed by weed leaves, translocated via phloem to meristematic tissues (growing points).

Biochemical Inhibition:

- Blocks ACCase, preventing synthesis of long-chain fatty acids essential for cell membrane formation.

Symptom Progression:

- 5–7 days: Leaf tips turn purple or red, growth cessation

- 10–14 days: Widespread necrosis from leaf margins inward

Target Crops & Weeds

Crop	Controlled Grassy Weeds
Wheat/Barley	Wild oats, blackgrass, annual ryegrass
Paddy Rice	Barnyard grass, green foxtail, crabgrass
Sugarcane/Turf	Johnsongrass, dallisgrass, annual bluegrass

Dosage & Application Guide

Crop	Dosage (g ai/ha)	Application Timing	Method & Tips
Winter Wheat	50–100 (500–1000 mL 10% EC)	2–4 leaf stage of weeds (post-emergent)	Spray with 200–300 L water/ha; add 0.5% v/v methylated seed oil (MSO) for enhanced absorption.
Paddy Rice	70–120 (700–1200 mL 10% EC)	3–5 leaf stage of weeds (post-transplant)	Apply in standing water (3–5 cm); avoid during heavy rain to prevent wash-off.
Barley	60–90 (600–900 mL 10% EC)	Early tillering stage of weeds	Tank-mix with bensulfuron-methyl for broadleaf control; spray on calm days (15–25°C).
Turfgrass	30–50 (300–500 mL 10% EC)	Spot treatment for young grassy weeds	Dilute in 100–200 L water/ha; avoid application on stressed turf.

Key Features & SEO-Optimized Benefits

Selective Grass Control:

- Targets 20+ grassy weeds while sparing broadleaf crops; ideal for wheat-barley rotations.

Systemic Efficacy:

- Translocates to roots, ensuring complete kill of perennial weeds like Johnsongrass.

Crop Safety:

- Safe for use in cereals when applied at 2–4 leaf weed stage; minimal crop phytotoxicity.

Residue Management:

- Short soil half-life (10–14 days) allows early rotation to soybeans, maize, or vegetables.

Cost-Effective:

- Low application rates (50–120 g ai/ha) reduce input costs vs. multiple herbicide applications.

Safety & Environmental Notes

Toxicity:

- Low mammalian toxicity (LD₅₀ > 2000 mg/kg rat); moderate risk to fish (LC₅₀ 1–10 mg/L).

Environmental Precautions:

- Maintain 50 m buffer from water bodies; avoid spraying on windy days to prevent drift.

Crop Rotation:

- Wait 3 months before planting sensitive crops (e.g., beets, spinach); safe for legumes after 60 days.

Storage:

Store at 5–30°C, away from food/feed; keep containers sealed to prevent evaporation.

Packaging & Compliance

Standard Packs: 1L, 5L, 20L COEX containers with UV-protective labels.

Regulatory Status:

- Registered in EU, USA (EPA), China, and major cereal-producing regions.

Shelf Life: 3 years under recommended storage conditions.

Compatibility & Tank Mixes

Common Combinations:

- With 2,4-D for broadleaf + grass control in wheat

- With metribuzin for pre/post-emergent weed suppression in rice

Adjuvants:

- Use MSO (1% v/v) or non-ionic surfactants to improve herbicide uptake in dry conditions.

SEO-Focused FAQ

What weeds does Fenoxaprop 10% EC control?

Primarily annual/perennial grasses like wild oats, blackgrass, barnyard grass.

Can it be used in rice fields?

Yes, for post-transplant control of grassy weeds at 3–5 leaf stage.

What is the pre-harvest interval (PHI)?

- Wheat/Barley: 45 days

- Rice: 60 days

How to manage herbicide-resistant wild oats?

Rotate with Group 2 (ALS inhibitors) or Group 15 (acetamides) herbicides.

Is Fenoxaprop safe for turfgrass?

Yes, for spot treatment of grassy weeds in established turf; avoid on newly seeded areas.

Field Performance Data

Wheat Trials in Europe:

75 g ai/ha + MSO controlled 92% of wild oats, increasing wheat yield by 1.8 t/ha.

Rice Trials in Asia:

100 g ai/ha suppressed barnyard grass by 95%, improving rice tillering and grain fill.

Residue Limits

Crop	MRL (mg/kg)	Regulatory Region
Wheat/Barley	0.05	EU, Codex Alimentarius
Rice	0.1	EPA, China
Turfgrass	N/A	Non-food crop

For detailed technical data sheets or custom formulation inquiries, contact our agricultural specialists for region-specific recommendations.

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