Diclosulam 84% WDG Herbicide Uses

Diclosulam 84% WDG is a triazolopyrimidine sulfonanilide herbicide registered for use in India under the Insecticides Act, 1968, formulated as water-dispersible granules (WDG). It is registered for control of broadleaf weeds, sedges and Echinochloa colona in soybean and groundnut, and is applied at a very low dose soon after sowing. 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

Diclosulam belongs to the triazolopyrimidine group of herbicides (HRAC Group 2, formerly Group B) and works as an acetolactate synthase (ALS) inhibitor. ALS is the enzyme plants need to make the branched-chain amino acids valine, leucine and isoleucine; when it is blocked, cell division stops at the growing points. Diclosulam is taken up from the soil by the roots and shoots of germinating weeds, and also through the leaves; susceptible weeds stop growing soon after emerging, their growing tips turn yellow or purplish, and they die over one to three weeks. Soybean and groundnut tolerate it at the registered dose, which is why it is used in these crops. CIB lists its application time as 0–3 days after sowing (DAS) in soybean.

Features & Benefits

• Very low dose — only about 10.6–12.5 g of product per acre.
• Controls broadleaf weeds and sedges such as Commelina (kankaua), Digera (tandla), Euphorbia (dudhi), Parthenium (gajar ghaas), Trianthema (bishkhapra) and Cyperus (motha), along with Echinochloa colona (sawa).
• Applied early — 0–3 days after sowing in soybean as per CIB — so weeds are controlled while the crop establishes.
• Water-dispersible granules are low-dust and easy to measure.
• ALS-inhibitor mode of action (Group 2) can be rotated with herbicides of other groups as part of a resistance-management programme.

Recommended Usage of Diclosulam 84% WDG 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 — 22–26 g a.i./ha, 26.2–30.9 g formulation/ha, 500 L water/ha, application time 0–3 days after sowing (DAS), waiting period 60 days; Groundnut — 22–26 g a.i./ha, 26.2–30.9 g formulation/ha, water volume not stated by CIB, waiting period 77 days. Because the dose is very small, weigh it accurately. Always confirm the current dose and water volume 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. Weigh the small dose accurately. Add the granules to a small quantity of water and stir until fully dispersed, then pour this into the half-filled spray tank and top up to the full volume while stirring.
3. Apply as a pre-emergence spray onto a moist, well-prepared seedbed within 0–3 days after sowing (the timing CIB lists for soybean), 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 — excess dose can injure the crop.
5. 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 weighing, mixing and spraying, and avoid inhaling dust or spray mist.
• Diclosulam belongs to herbicide Group 2 (ALS inhibitors), a group in which weed resistance can develop quickly with repeated use; avoid using Group 2 herbicides season after season on the same field, and rotate with herbicides from a different group.
• ALS herbicides can remain active in soil — check the label for re-cropping intervals before sowing a sensitive crop in a field treated with diclosulam.
• Clean the sprayer thoroughly after use — even tiny residues of ALS herbicides left in the tank can injure sensitive crops sprayed later with the same equipment.
• Respect the waiting period (PHI) before harvest: 60 days in soybean and 77 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.