Flumioxazin 50% SC Herbicide Uses

Flumioxazin 50% SC is an N-phenylphthalimide herbicide registered for use in India under the Insecticides Act, 1968, formulated as a suspension concentrate (SC). It is registered for control of grassy and broadleaf weeds in soybean, wheat, groundnut and sugarcane — including problem wheat weeds such as Phalaris minor (gulli danda) and Avena fatua (wild oat) — and acts mainly through the soil on emerging weeds. 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

Flumioxazin belongs to the N-phenylphthalimide group of herbicides (HRAC Group 14, formerly Group E) and works as a protoporphyrinogen oxidase (PPO) inhibitor. Blocking this enzyme in the chlorophyll-production pathway causes a build-up of light-activated molecules that rapidly destroy cell membranes. Weed seedlings emerging through the treated soil layer take up the herbicide and collapse quickly — tissue first looks water-soaked, then turns brown and dries out (necrosis). Flumioxazin forms a treated layer on the soil surface and is used mainly as a pre-emergence treatment, acting on weeds as they germinate and emerge rather than on large, established weeds.

Features & Benefits

• Controls both grassy and broadleaf weeds — including Phalaris minor (gulli danda) and Avena fatua (wild oat) in wheat, and Commelina (kankaua), Digera (tandla) and Echinochloa (sawa) in soybean and groundnut.
• Low per-acre dose — about 100 ml per acre in soybean, wheat and groundnut.
• Suspension concentrate (SC) formulation mixes easily in water without dust.
• PPO-inhibitor mode of action (Group 14) differs from the ACCase (Group 1) and ALS (Group 2) herbicides widely used against Phalaris minor in wheat, making it a useful rotation partner for resistance management.

Recommended Usage of Flumioxazin 50% SC 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, Wheat and Groundnut — 125 g a.i./ha, 250 ml formulation/ha, 500 L water/ha, waiting period 110, 137 and 92 days respectively; Sugarcane — 150–175 g a.i./ha, 300–350 ml formulation/ha, 500 L water/ha, waiting period 267 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. Shake the container well. 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. Apply as a pre-emergence spray onto a well-prepared, level, moist seedbed soon after sowing or planting and before the crop and weeds emerge, or at the timing given on the product label.
4. Use a knapsack or power sprayer fitted with a flat-fan nozzle for even ground coverage, and avoid overlapping spray passes, which raise the dose and can cause crop injury.
5. Do not disturb the soil surface (for example by hoeing or inter-cultivation) soon after spraying, as this breaks the treated soil layer and reduces weed control.
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.
• Flumioxazin belongs to herbicide Group 14 (PPO 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.
• Do not spray over emerged crop plants unless the label allows it — spray falling on green crop leaves can cause scorching.
• Respect the waiting period (PHI) before harvest: 110 days in soybean, 137 days in wheat, 92 days in groundnut and 267 days in sugarcane.
• 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.