Active ingredient and mode of action
- Active ingredient: Ethoxysulfuron 15% WDG (water dispersible granules).
- Mode of action: Inhibits the acetolactate synthase (ALS/AHAS) enzyme, blocking branched-chain amino acid synthesis in weeds.
- Systemic activity: Rapidly absorbed through weed foliage and roots, translocating to growing points within hours.
Target weed spectrum in rice fields
- Sedges: Cyperus difformis, Cyperus iria, and Scirpus juncoides.
- Broadleaf weeds: Monochoria vaginalis, Ludwigia parviflora, Sphenoclea zeylanica, and Eclipta alba.
- Leaves broadleaf and sedge weeds yellowing and stunted within 5 to 7 days, with complete desiccation in 2 to 3 weeks.
Field application timing and water management
Apply when broadleaf weeds and sedges are at the 2 to 4 leaf stage, typically 10 to 15 days after transplanting. Drain standing water from the field prior to spraying so weed foliage is exposed, and re-flood the field 24 to 48 hours later, maintaining a shallow water layer for several days to prevent new weed flushes.
Official source
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Central Insecticides Board & Registration Committee (CIB&RC) ↗Related on KisanPe
Common questions
What is the active ingredient in Sunrice herbicide?
Sunrice contains Ethoxysulfuron 15% WDG, a sulfonylurea herbicide.
Which weeds are controlled by Sunrice in paddy?
It controls major sedges and broadleaf weeds in rice, including Cyperus species and Monochoria vaginalis.
Should paddy fields be flooded while applying Sunrice?
No, drain standing water before application so herbicide droplets land directly on weed leaves; re-flood the field 1 to 2 days after application.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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