Active Ingredient and Mode of Action
Nominee Gold features Bispyribac-Sodium, a pyrimidinyl carboxy herbicide formulated as a suspension concentrate.
It works by inhibiting the plant enzyme acetolactate synthase (ALS), stopping the biosynthesis of essential branched-chain amino acids (valine, leucine, and isoleucine) in susceptible weeds.
Weed growth stops within hours of spraying, followed by foliar chlorosis and complete weed collapse within two to three weeks.
- Formulation: 10 percent Suspension Concentrate (SC)
- Selectivity: High physiological selectivity in direct-seeded rice (DSR) and transplanted paddy
- Systemic uptake: Rapidly absorbed through weed foliage and roots with fast systemic translocation
Target Weeds and Application Window in Rice
Nominee Gold controls difficult mixed weed infestations that compete fiercely with young rice seedlings.
Application timing should target weeds at the two to four leaf stage, typically ten to twenty-five days after transplanting or sowing.
- Grasses: Effectively controls Echinochloa colona, Echinochloa crus-galli, and Ischaemum rugosum
- Broadleaf weeds: Suppresses Eclipta alba, Ludwigia parviflora, and Sphenoclea zeylanica
- Sedges: Controls Cyperus difformis and Cyperus iria
Water Management and Spraying Instructions
Before application, drain standing water from paddy fields so weed foliage is fully exposed to spray droplets.
Re-flood fields within forty-eight hours post-application and maintain shallow standing water for five to seven days to prevent new weed flushes.
- Field drainage: Drain standing water prior to spraying to maximize foliar chemical contact
- Re-flooding: Reintroduce shallow water into paddy basins two days after spraying
- Nozzle type: Use flat fan or floodjet nozzles for uniform foliar distribution
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active chemical in Nominee Gold?
Nominee Gold contains Bispyribac-Sodium 10% SC, a selective post-emergence herbicide for rice.
Why must water be drained before spraying Nominee Gold in paddy?
Draining standing water exposes target weed leaves to the spray droplets; submerged weed foliage will not absorb the herbicide.
When should standing water be reintroduced after spraying Nominee Gold?
Reintroduce shallow standing water into the rice field forty-eight hours after spraying and maintain it for several days.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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