HPM Benister Herbicide (Bispyribac Sodium 10% SC)
The Ultimate Post-Emergence Solution for Weed-Free Rice and DSR Farming.
Direct Seeded Rice (DSR) and modern paddy farming face a massive challenge: aggressive weeds that compete for nutrients and sunlight. HPM Benister is a technologically advanced, broad-spectrum herbicide designed to rescue your crop.
HPM Benister (Bispyribac-sodium 10% SC) is a selective, systemic herbicide that targets the toughest grasses, sedges, and broad-leaf weeds without harming your paddy. It is the ideal "Gold Standard" choice for nurseries, transplanted rice, and DSR fields.
Why Choose This Product? Key Benefits
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Instant Growth Stop: Weeds stop growing immediately after spraying, ensuring they no longer compete with your paddy for food or light.
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Safe for Paddy: Uses "Metabolic Shield" technology—your rice plant naturally digests the chemical safely, while the weeds cannot.
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Wide Application Window: Flexible timing allows use from the nursery stage up to 25 days after sowing (2-5 leaf stage of weeds).
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Rainfast in 6 Hours: Quickly absorbed by leaves; if it rains 6 hours after spraying, your application remains effective.
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Complete Broad Spectrum: One shot controls Grasses (Barnyard grass), Sedges (Umbrella sedge), and Broad-leaf weeds.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | HPM Benister |
| Technical Name | Bispyribac-sodium 10% SC |
| IRAC MoA Code | Group 2 (ALS Inhibitor) |
| Chemical Group | Pyrimidinylthiobenzoate |
| Formulation | Suspension Concentrate (SC) |
| Toxicity Label | Blue Label (Moderately Toxic) |
How It Works: Mode of Action
HPM Benister works by starving the weed from the inside out. It acts as an ALS Inhibitor:
- Absorption: The herbicide is absorbed through the leaves and moves to the roots and growing tips.
- Enzyme Blockade: It blocks the production of essential amino acids (Valine, Leucine, Isoleucine) required for plant life.
- Elimination: The weed stops growing instantly. Leaves turn yellow (chlorosis), then brown (necrosis), leading to complete death within 7-14 days.
Note: The rice crop is safe because it has special enzymes that break down the chemical before it causes harm.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Rice (Nursery) | Barnyard Grass (Echinochloa), Sedges |
| Rice (Transplanted) | Echinochloa species, Cyperus difformis, Monochoria |
| Direct Seeded Rice (DSR) | Mixed flora: Grasses, Sedges, Broad-leaf weeds |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (ml / Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Rice (All types) | 80 ml - 120 ml | 120 - 150 Liters | 0.6 - 0.8 ml | Follow Label* |
| High Weed Pressure | 120 ml - 150 ml | 150 Liters | 0.8 - 1.0 ml | Follow Label* |
*PHI = Pre-Harvest Interval: No residues were detected in grain or straw at harvest in trials. Generally, apply 20-25 days after sowing.
How to Apply: Best Practices
- Timing: Apply when weeds are in the 2 to 5 leaf stage (usually 10-14 days after transplanting or 15-25 days in DSR). Early application is key.
- Mixing: Use clean water. Ensure the soil is moist (saturated) but not flooded during application. Use a Flat Fan or Flood Jet nozzle for best coverage.
- Coverage (Drain-Spray-Flood): Drain standing water before spraying so the weed leaves are exposed. Spray uniformly. Re-flood the field after 48-72 hours to suppress new weeds.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid drift to nearby fish ponds.
Frequently Asked Questions
1. What is the best time to spray HPM Benister?
The ideal time is when weeds have 2 to 5 leaves. For DSR, this is usually 15-25 days after sowing. For transplanted rice, it is 10-14 days after transplanting.
2. Can I use Benister if it is about to rain?
No. The product needs 6 hours of dry weather to be fully absorbed by the weed leaves. Do not spray if rain is imminent.
3. Is it necessary to drain the water before spraying?
Yes, absolutely. Weeds must be exposed for the chemical to hit them. Drain the water, spray, leave for 2-3 days, and then re-flood.
4. Which weeds does HPM Benister kill?
It is a broad-spectrum herbicide that controls Barnyard grass (Echinochloa), Jungle rice, Sedges (Umbrella sedge), and broad-leaf weeds like Water Primrose.
5. Is it safe for fish or aquaculture?
No. Bispyribac-sodium can be toxic to aquatic life. Do not use near fish ponds or aquaculture setups.
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. This product is a Blue Label (Moderately Toxic) compound.
