Fluazifop-p-butyl 13.4% EC Herbicide Uses

Fluazifop-p-butyl 13.4% EC is an aryloxyphenoxypropionate ("fop") herbicide registered for use in India under the Insecticides Act, 1968, formulated as an emulsifiable concentrate (EC). It is a selective, post-emergence grass herbicide registered for control of grassy weeds in soybean, cotton and groundnut — broadleaf crops that tolerate it — and is sprayed onto weeds after they have emerged. This page lists its mode of action, key benefits and the recommended dosage per crop as per the official Central Insecticides Board & Registration Committee (CIB&RC) list of approved herbicide uses (Government of India).

Which Weeds Does This Control? (Field Identification Guide)

Not sure whether the weeds in your field match this herbicide's use case? This guide helps match weed identification to this herbicide's approved crop-wise uses.

Mode of Action

Fluazifop-p-butyl belongs to the aryloxyphenoxypropionate group of herbicides (HRAC Group 1, formerly Group A) and inhibits the enzyme acetyl-CoA carboxylase (ACCase), which grasses need to make the fatty acids for new cell membranes. It is absorbed through the leaves of emerged grasses and moves within the plant to the growing points at the shoot tip and nodes, and into the runners and rhizomes of perennial grasses. Growth stops within a few days; the youngest leaves turn yellow, the growing point rots so the central shoot pulls out easily, and the grass dies over about two to three weeks. Broadleaf crops such as soybean, cotton and groundnut have a less sensitive form of the enzyme, so they are not harmed at the registered dose. Its activity is mainly on grasses; it is not a general broadleaf or sedge herbicide.

Features & Benefits

• Selective — controls grassy weeds in a standing broadleaf crop without harming the crop at the registered dose.
• Post-emergence — sprayed after the grasses have emerged, so it can be used once the grass problem is visible in the field.
• Controls Echinochloa (sawa), Dactyloctenium (makra), Eleusine, Digitaria and other listed grasses, and in soybean also Cynodon dactylon (doob ghaas).
• Systemic movement to the growing points and runners helps control spreading grasses.
• ACCase-inhibitor mode of action (Group 1) differs from the soil-applied pre-emergence herbicides commonly used in these crops, so the two can be combined in a weed-management programme.

Recommended Usage of Fluazifop-p-butyl 13.4% EC Herbicide

The table below gives the recommended dose, water volume and waiting period per acre for each crop, converted from the CIB&RC-registered per-hectare rate — see the note below the table for conversion details. Always spray in the recommended water volume for uniform coverage, and confirm against the current product label before use.

Figures above are converted from the CIB&RC-registered per-hectare rates (1 ha ≈ 2.47 acres): Soybean — 125–250 g a.i./ha, 1000–2000 ml formulation/ha, 500 L water/ha, waiting period 90 days; Cotton — 167 g a.i./ha, 1250 ml formulation/ha, 500 L water/ha, waiting period 104 days; Groundnut — 167 g a.i./ha, 1250 ml formulation/ha, 500 L water/ha, waiting period 59 days. Always confirm the current dose on your specific product's label before use.

How to Use

1. Confirm your crop matches one of this herbicide's approved uses listed above, and identify the weeds present using the guide above.
2. Fill the spray tank half-way with clean water, add the measured dose, stir well, and then top up to the full volume while stirring.
3. Spray as a post-emergence application onto young, actively growing grass weeds, at the weed stage given on the product label, covering the grass leaves thoroughly.
4. Do not spray grasses that are stressed by drought, waterlogging or cold — uptake is poor and control is weaker; spray when soil moisture is adequate.
5. Use a knapsack or power sprayer fitted with a flat-fan nozzle for uniform coverage of the weed foliage.
6. Spray in calm weather, avoiding windy conditions and rain expected within a few hours, to reduce drift and wash-off.

Precautions & Safety

• Wear appropriate PPE — mask/respirator, gloves, goggles and full-sleeved clothing — while mixing and spraying, and avoid skin and eye contact and inhaling the spray mist.
• Fluazifop-p-butyl belongs to herbicide Group 1 (ACCase inhibitors); avoid repeated, season-after-season use of the same mode-of-action group on the same field, and rotate with herbicides from a different group as part of an integrated weed-management programme to slow resistance development.
• Grass crops such as rice, wheat, maize, sorghum and sugarcane are highly sensitive — do not let spray drift onto neighbouring cereal or grass crops, and clean the sprayer thoroughly before using it on them.
• Respect the waiting period (PHI) before harvest: 90 days in soybean, 104 days in cotton and 59 days in groundnut.
• Do not let spray drift, runoff or washings reach ponds, canals, streams or drinking-water sources.
• Store in the original, tightly closed container in a cool, dry place away from direct sunlight, food and feed, and out of reach of children and livestock.
• Wash hands, face and any exposed skin thoroughly with soap and water after handling or spraying, and change out of contaminated clothing before eating, drinking or smoking.

Brand names mentioned on this page are registered trademarks of their respective owners and are referenced here for identification purposes only; FarmMate is not affiliated with or endorsed by these brands. This page is for general information only — always consult your local agricultural extension office and confirm the current product label before use.