Nominee Gold Herbicide (Bispyribac-sodium 10% SC): Complete Guide for Rice
The "Gold Standard" Post-Emergence Solution for Weed-Free Rice Farming
Nominee Gold by PI Industries is a revolutionary post-emergence herbicide designed specifically for rice ecosystems. Powered by Bispyribac-sodium 10% SC, it offers a "rescue" solution for farmers by effectively controlling weeds after they have already emerged.
Whether you practice transplanted paddy or Direct Seeded Rice (DSR), Nominee Gold eliminates the need for expensive manual weeding. It targets a broad spectrum of enemies—including stubborn grasses like Barnyard grass, sedges, and broadleaf weeds—ensuring your crop gets all the nutrients it deserves.
Why Choose This Product? Key Benefits
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Wide Application Window: It works effectively when applied 15–25 days after sowing or transplanting, giving you flexibility even if rains delay your spray.
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Broad Spectrum Control: A single shot controls all major weed types: Grasses (Echinochloa), Sedges (Cyperus), and Broadleaf weeds.
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Rainfast in 6 Hours: The advanced SC formulation absorbs quickly. If it rains 6 hours after spraying, your application remains effective.
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Safe for Rice: Thanks to metabolic selectivity, rice plants naturally detoxify the chemical, keeping the crop safe while killing the weeds.
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Cost-Effective: Chemical weeding with Nominee Gold is approximately 50-70% cheaper than hiring manual labor for hand-weeding.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Nominee Gold |
| Technical Name | Bispyribac-sodium 10% SC |
| IRAC MoA Code | Group 2 (ALS Inhibitor) |
| Chemical Group | Pyrimidinylthiobenzoate |
| Formulation | Suspension Concentrate (SC) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Nominee Gold works by disrupting the internal "food factory" of the weed. It is a systemic herbicide, meaning it moves inside the plant from leaves to roots.
- Enzyme Inhibition: It targets the ALS enzyme, which weeds need to produce essential amino acids (Valine, Leucine, Isoleucine).
- Systemic Movement: Once sprayed, the chemical is absorbed by leaves and roots. It travels via the phloem and xylem to the growing tips of the weed.
- Starvation & Death: Without amino acids, protein synthesis stops. The weed stops growing immediately, turns yellow (chlorosis), and dies within 1-3 weeks.
Note: Rice plants survive because they have a special enzyme (Cytochrome P450) that breaks down the chemical before it hurts them.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Rice (Nursery) | Barnyard grass (Echinochloa crus-galli), Jungle Rice (Echinochloa colona) |
| Rice (Transplanted) | Echinochloa spp., Sedges (Cyperus difformis, Cyperus iria), Broadleaf weeds (Ludwigia, Eclipta) |
| Direct Seeded Rice (DSR) | Critical for early season control of Grasses, Sedges, and Broadleaf weeds. |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results. Using less water is the #1 cause of failure.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (ml / Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Rice (Nursery) | 80 - 120 ml | 120 - 150 L | 0.6 - 1.0 ml | 78 |
| Rice (Transplanted) | 80 - 120 ml | 120 - 150 L | 0.6 - 1.0 ml | 78 |
| Direct Seeded Rice | 80 - 120 ml | 120 - 150 L | 0.6 - 1.0 ml | 78 |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: Apply when weeds are at the 2 to 5 leaf stage (usually 15-25 days after sowing/transplanting). If weeds are too large, efficacy drops.
- Mixing: Shake the bottle vigorously before opening to mix the suspension. Do not mix with sand or urea; it must be sprayed.
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Coverage (The Drain-Spray-Reflood Method):
1. Drain the standing water from the field so weeds are exposed.
2. Spray uniformly using a Flat Fan or Flood Jet nozzle.
3. Reflood the field after 48-72 hours and hold water for 5-7 days to suppress new weeds. - Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. Why did my rice turn yellow after spraying?
This is a common "Yellow Flash." It happens because the crop is temporarily stressed while detoxifying the chemical. The rice will recover and turn green again within 10-14 days without yield loss. A top dressing of Urea after 7 days can help recovery.
2. Can I mix Nominee Gold with other chemicals?
Do NOT mix with Sulfur or Copper-containing fungicides, as this causes severe crop burning. It is generally best to spray Nominee Gold alone.
3. What happens if it rains after I spray?
Nominee Gold becomes rainfast in 6 hours. If it rains after this period, you do not need to respray.
4. Can I use it on other crops?
No. This product is strictly recommended for Rice only. Using it on other crops may kill them.
5. Why is water management important?
Since the herbicide enters through leaves, submerged weeds won't be killed. You must drain the water to expose the weeds before spraying, then reflood later to stop new seeds from germinating.
Safety & Disclaimer
Always read and follow the instructions on the official product label. The information provided here is for guidance only. Use personal protective equipment (PPE) during application. Toxic to aquatic life; avoid using near aquaculture ponds.
