Fluazifop-P-butyl 108g/L EC Selective Grass Herbicide for Broadleaf Crops
websiteFluazifop-P-butyl 108g/L EC is a highly effective selective post-emergence herbicide designed specifically for controlling grass weeds in broadleaf crops. Marketed internationally under trade names such as Fusilade Forte and Fusilade II, this emulsifiable concentrate formulation provides reliable grass control while leaving broadleaf crops unharmed.
Product Specifications
| Product Name | Fluazifop-P-butyl EC |
| Active Ingredient | Fluazifop-P-butyl 108g/L |
| Chemical Class | Aryloxyphenoxypropionate (FOP) |
| HRAC/WSSA Mode of Action | Group 1 / Group A (ACCase inhibitor) |
| Formulation Type | EC (Emulsifiable Concentrate) |
| Applicable Crops | Soybean, cotton, tree nuts, asparagus, coffee, potatoes, onions, carrots, peanuts, bananas, and non-grass ornamentals |
| Application Timing | Post-emergence (foliar application) |
| Target Weeds | Annual and perennial grass weeds |
| Symptom Timeline | Visible yellowing/reddening within 7–14 days; complete control within 2–4 weeks |
Mechanism of Action
Isomer Chemistry
The "P" in fluazifop-P-butyl designates the herbicidally active R-isomer. While the parent compound exists as two enantiomers (R- and S-isomers), only the R-isomer possesses herbicidal activity. This purified form ensures maximum efficacy in modern formulations.
ACCase Inhibition
Fluazifop-P-butyl functions as an acetyl-CoA carboxylase (ACCase) inhibitor, disrupting fatty acid biosynthesis and lipid formation in target plants. Classified as a Group 1 herbicide by the Weed Science Society of America (WSSA), it inhibits the ACCase enzyme crucial for fatty acid synthesis in actively growing cells.
Systemic Translocation
The herbicide is absorbed through grass leaves and translocated throughout the plant, concentrating in actively growing regions such as shoot and root tips. By inhibiting ACCase at these critical growth points, it disrupts essential cellular functions and ultimately kills the weed.
Grass-Selectivity Science
The selective action stems from fundamental differences in ACCase enzyme systems between monocots (grasses) and dicots (broadleaf plants). Grasses possess the vulnerable homomeric ACCase enzyme in their plastids, while broadleaf plants rely on the insensitive heteromeric form, providing inherent selectivity.
Registered Crops and Target Weeds
This selective herbicide controls most annual and perennial grasses in crops including cotton, soybeans, tree nuts, asparagus, and coffee. It is non-phytotoxic to potatoes, onions, carrots, climbing plants, peanuts, bananas, and non-grass ornamentals. The formulation is also applicable to a wide range of ornamental plants in container, field nursery, landscape, and greenhouse settings.
Resistance Management
As with other ACCase-inhibiting herbicides, resistance development is a documented concern. Currently, 47 biotypes of ACCase-inhibition herbicide-resistant weeds have been reported globally. Some weeds develop cross-resistance through enhanced metabolic detoxification, potentially reducing sensitivity to multiple herbicide classes.
Management Strategy: Avoid relying solely on fluazifop-P-butyl or other Group 1 herbicides. Implement rotation with herbicides from different HRAC mode-of-action groups to maintain long-term efficacy and delay resistance development.
Environmental Fate
Fluazifop-P-butyl is rapidly hydrolyzed by soil microbes to fluazifop acid, with further degradation through microbial activity. The herbicide and its degradation products typically show a half-life of two to five weeks. Application at recommended field rates may affect soil bacterial community richness and reduce activity of key soil enzymes.
Application Guidance
Timing
Apply as a foliar post-emergence spray once target grass weeds have emerged and are actively growing. Optimal efficacy is achieved when weeds are treated at earlier growth stages before extensive tillering.
Adjuvant Use
For enhanced uptake and efficacy, apply in combination with a crop oil concentrate or nonionic surfactant as recommended on the product label.
Compatibility
The herbicide is compatible with various other herbicides and formulations, including fenoxaprop-ethyl and metolachlor, allowing for broader-spectrum tank-mix programs where additional weed control is needed.
Resistance Rotation
As a HRAC Group 1 (ACCase inhibitor) herbicide, rotate or tank-mix with herbicides from different mode-of-action groups to help delay resistance development, particularly in fields with repeated grass-selective herbicide use history.
Exact dosage rates, adjuvant selection, and pre-harvest intervals should always follow the product label and local plant protection authority recommendations, as registered uses and rates vary by crop and region.
Frequently Asked Questions
Is Fluazifop-P-butyl a pre-emergence or post-emergence herbicide?
It is strictly a post-emergence, foliar-applied herbicide. It must be sprayed onto emerged, actively growing grass foliage to be effective and has no meaningful pre-emergence soil activity.
Why does the product name include "P"?
The "P" designates the herbicidally active R-isomer of fluazifop-butyl. Only the R-isomer (fluazifop-P-butyl) has herbicidal activity, making this the internationally standard, higher-purity active form used in modern formulations.
Will this herbicide harm my broadleaf crop?
No — fluazifop-P-butyl is selective for grasses due to differences in ACCase enzyme sensitivity between monocots and dicots. It is registered as non-phytotoxic across a wide range of broadleaf crops including soybean, cotton, potatoes, onions, carrots, and peanuts when applied per label directions.
How quickly will I see results after application?
Visible symptoms such as yellowing or reddening of treated grass weeds typically appear within 7–14 days, with complete weed control generally achieved within 2–4 weeks.
Is OEM or custom packaging available?
Yes, we offer OEM processing and custom packaging tailored to the registration and labeling requirements of different export markets.
Why Source From Us
- Factory-direct pricing: No middleman markups, competitive wholesale rates
- Consistent quality control: Standardized production ensuring stable active ingredient content and isomer purity batch after batch
- Flexible customization: OEM, private labeling, and custom packaging sizes available
- Reliable stock availability: In-stock inventory to support peak growing-season demand
- Export experience: Familiar with international registration documentation and shipping compliance across different markets
Interested in wholesale pricing, technical documentation (COA/MSDS), or OEM packaging options? Contact our team today for a customized quotation.
References
University of Hertfordshire Pesticide Properties Database (AERU) • Chemical Warehouse • UC ANR WeedCUT • GuideChem • ScienceDirect • PMC (NCBI)
