Ethoxysulfuron 15% WDG Herbicide Uses

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    Ethoxysulfuron 15% WDG is a selective, systemic, post-emergence herbicide from the sulfonylurea group, registered for use in India under the Insecticides Act, 1968. It is applied as a foliar spray to actively growing weeds in transplanted rice and sugarcane, and is absorbed through both the leaves and roots of target weeds at very low use rates. This page lists its mode of action, key benefits and the recommended crop-wise dosage as per CIB-registered labels.

    Which Weeds Does This Control? (Field Identification Guide)

    Not sure whether the weeds coming up in your rice or sugarcane field fall within this herbicide's control range? This guide helps you identify the sedges and broadleaf weeds it targets so you can confirm before spraying.

    Crop Weed (Common Name) How to Recognise It
    Transplanted Rice Fimbristylis miliacea — known as Hoora grass Small, densely tufted sedge with very thin, wiry, three-angled stems and tiny clustered brownish flower heads; easy to mistake for young Cyperus but has noticeably finer foliage.
    Transplanted Rice Cyperus iria / Cyperus difformis — commonly called "मोथा" (Motha) by farmers, or nut grass / sedges Grass-like sedge with a distinctly triangular stem (not round) when rolled between the fingers; grows in tufts from the base and carries umbrella-like clusters of small brownish spikelets at the top of the stem.
    Transplanted Rice Scirpus spp. — known as bulrush / club-rush Tall, round-stemmed sedge growing in dense clumps in standing water, with a soft, pith-filled stem and a cluster of small brownish spikelets bunched near the tip rather than a true umbrella shape.
    Transplanted Rice Eclipta alba — commonly called "भृंगराज" (Bhringraj) by farmers, or false daisy Low, spreading broadleaf weed with narrow, rough-textured, paired leaves and small white daisy-like flower heads; stems root easily wherever a node touches moist soil.
    Transplanted Rice Marsilea quadrifolia — known as water clover fern Small aquatic fern that looks like a four-leaf clover floating just above the water surface on a thin stalk; spreads by creeping underground stems and can carpet the field quickly if unchecked.
    Transplanted Rice Ammania baccifera — commonly called "बनमिर्च" (Banmirich) by farmers Slender, upright broadleaf weed with narrow, opposite leaves along a reddish, square-ish stem, and tiny purplish flowers clustered tightly at the leaf joints.
    Transplanted Rice Monochoria vaginalis — oval-leaf pondweed Broadleaf weed with glossy, heart-to-oval shaped leaves on long stalks rising from the base, and small violet-blue flower spikes; easily mistaken for a young aquatic ornamental if the field is not scouted early.
    Sugarcane Cyperus rotundus — commonly called "मोथा" or "नागरमोथा" (Motha / Nagarmotha) by farmers, or purple nutsedge Grass-like sedge with a triangular stem and dark green, glossy leaves, spreading through underground tubers that make it very persistent; hard to remove by hand-weeding alone since new shoots regrow from tubers left behind.

    Mode of Action

    Ethoxysulfuron belongs to the sulfonylurea class of herbicides and works by inhibiting acetolactate synthase (ALS), an enzyme weeds need to produce the branched-chain amino acids valine, leucine and isoleucine. Without these amino acids, protein synthesis and cell division stop in the weed's growing points. It is systemic and effective at very low doses, taken up through both the leaves and roots of actively growing weeds and moved within the plant to the shoot and root tips. Treated sedges and broadleaf weeds typically stop growing within a few days, show yellowing/reddening, and gradually die over one to three weeks, while rice and sugarcane tolerate the herbicide at the labelled dose.

    Features & Benefits

    • Post-emergence, foliar-and-root-acting control effective at very low use rates per acre.
    • Strong activity on sedges (Cyperus iria, Cyperus difformis, Cyperus rotundus, Fimbristylis miliacea, Scirpus spp.) and several broadleaf weeds (Eclipta alba, Marsilea quadrifolia, Ammania baccifera, Monochoria vaginalis) across transplanted rice and sugarcane.
    • Water-dispersible granule (WDG) formulation that mixes cleanly into the spray tank.
    • Useful as a resistance-management rotation partner where sedges have become harder to control with other herbicide groups over repeated seasons.

    Recommended Usage of Ethoxysulfuron 15% WDG Herbicide

    The table below gives the CIB-registered dose, water volume, timing and waiting period per acre, converted from the official per-hectare rate (1 hectare ≈ 2.47 acres). Always confirm against the current product label before use.

    Crop Target Weeds Dose per Acre Water Volume Application Timing Waiting Period (PHI)
    Transplanted Rice Fimbristylis miliacea, Cyperus iria, Cyperus difformis, Scirpus spp., Eclipta alba, Marsilea quadrifolia, Ammania baccifera, Monochoria vaginalis ≈5–6 g a.i. (≈34–40 g formulation) ≈200–205 litres Post-emergence, on actively growing weeds 110 days
    Sugarcane Cyperus rotundus ≈24 g a.i. (≈162 g formulation) ≈200–205 litres Post-emergence, on actively growing weeds 205 days

    Doses above are converted from the CIB-registered per-hectare rate (transplanted rice: 12.5–15 g a.i./ha, 83.3–100 g formulation/ha; sugarcane: 60 g a.i./ha, 400 g formulation/ha; 500 litres water/ha for both) for Ethoxysulfuron 15% WDG. Always confirm the current pack label/CIB registration and consult your local agricultural extension office before use and before harvest.

    How to Use

    1. Apply when weeds are small and actively growing, as per the timing on the current label; larger, well-established weeds are harder to control.
    2. Mix the required quantity of Ethoxysulfuron 15% WDG into the spray tank and agitate well so the water-dispersible granules dissolve evenly.
    3. In transplanted rice, drain standing water from the field or reduce it to a thin film before spraying, so the spray reaches weed foliage directly rather than being diluted by floodwater.
    4. Spray uniformly using a knapsack or power sprayer fitted with a flat-fan nozzle, ensuring even coverage of weed foliage.
    5. In rice, re-flood the field with a thin layer of water only after the spray has dried on the leaves, typically after a few hours, as per current label directions.
    6. Avoid spraying during strong wind or if rain is expected within a few hours, as this can reduce weed uptake and control.

    Precautions & Safety

    • Wear appropriate PPE — mask, gloves, goggles and full-sleeved clothing — while mixing and spraying.
    • Measure the small quantities required carefully, since this herbicide is used at very low per-acre doses and small errors can significantly affect the actual rate applied.
    • Apply only at the correct crop stage and dose given above; do not drain the field immediately before spraying or re-flood too soon after, as both reduce weed control.
    • Store in the original, tightly closed container in a cool, dry place away from direct sunlight, food, feed and out of reach of children and livestock.
    • Respect the labelled waiting period (PHI) — 110 days for transplanted rice, 205 days for sugarcane — before harvest, and follow your local agricultural extension advice for the latest guidance.
    • Ethoxysulfuron is an ALS-inhibitor (Group 2) herbicide; avoid repeated, back-to-back use of the same mode of action on the same field across seasons, and rotate herbicide groups as part of a resistance-management program.
    • 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.

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