Chemical Mode of Action and Target Weed Spectrum
Sulfosulfuron belongs to the sulfonylurea chemical group (HRAC Group 2). It inhibits acetolactate synthase (ALS), halting the biosynthesis of essential branched-chain amino acids (valine, leucine, and isoleucine) in susceptible weed meristems.
Wheat possesses natural metabolic pathways to rapidly detoxify Sulfosulfuron, ensuring high crop safety when applied as directed.
- Grassy weeds: Phalaris minor (canary grass / mandusi) and Avena fatua (wild oats).
- Broadleaf weeds: Chenopodium album (bathua), Melilotus alba, Rumex dentatus, and Medicago denticulata.
- Formulation: Water dispersible granules (WG) that dissolve cleanly in spray water.
- Application window: Applied post-emergence between 30 to 35 days after wheat sowing following the first crown root irrigation.
Application Guidelines and Rotational Crop Precautions
Effective weed mortality requires applying when weeds have 2 to 4 leaves and adequate soil moisture is present.
Growers must observe rotational crop restrictions because Sulfosulfuron residual persistence can affect subsequent sensitive crops.
- Always add the recommended surfactant (such as non-ionic adjuvant) to enhance spray droplet adherence on waxy grass leaves.
- Use flat fan or floodjet nozzles fitted to a calibrated knapsack or tractor boom sprayer.
- Rotational crop advisory: Do not plant sensitive legumes or maize immediately following treated wheat without observing recommended field waiting intervals.
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the primary target weed of Sulfosulfuron 75% WG in wheat?
It primarily targets Phalaris minor (canary grass / gulli danda) along with common broadleaf weeds like Chenopodium album (bathua).
When is the optimal time to apply Sulfosulfuron in wheat fields?
The ideal time is 30 to 35 days after sowing, following the first irrigation when weeds are actively growing with 2 to 4 leaves.
Is an adjuvant required when spraying Sulfosulfuron?
Yes, using the manufacturer-specified non-ionic surfactant is essential to ensure adequate spray retention on waxy weed foliage.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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