Hpm Benister
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HPM Benister Herbicide (Bispyribac-sodium 10% SC)
The Ultimate "Rescue" Herbicide for Direct Seeded and Transplanted Rice.
HPM Benister is a premium post-emergence herbicide designed to protect your Paddy yield. Powered by Bispyribac-sodium 10% SC, it provides broad-spectrum control against the toughest grassy weeds, sedges, and broad-leaf weeds. It is specifically formulated to be safe for your crop while effectively stopping weed competition, saving you labor costs and ensuring a healthy harvest.
Best for: Farmers practicing Direct Seeded Rice (DSR) or transplanting who need effective mid-season weed control.
Why Choose This Product? Key Benefits
- ⏱️Labor Saver: Replaces expensive and slow manual weeding. One spray does the work of 15-20 laborers, cutting costs by over 90%.
- ?️Broad Spectrum Defense: Controls "Mixed Weed Flora" with a single shot. Effective against grasses (Barnyard grass), Sedges, and broad-leaf weeds simultaneously.
- ⏳Flexible Timing: Works as a "rescue" herbicide. You can apply it when weeds are at the 2 to 5-leaf stage (typically 10-25 days after sowing/planting).
- ?️Rainfastness: Rapidly absorbed by weeds. The product becomes rainfast within just 6 hours of application.
- ?Crop Safety: Water-based Suspension Concentrate (SC) formulation ensures no "leaf burn" or shock to the rice plant, unlike solvent-based chemicals.
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 (Liquid) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
HPM Benister works systemically, meaning it travels inside the plant to kill it from the roots up.
- Absorption: The herbicide is absorbed through the leaves and roots of the weed immediately after spraying.
- Enzyme Block: It targets and blocks the ALS enzyme (Acetolactate Synthase). This enzyme is vital for producing essential amino acids.
- Starvation & Death: Without these amino acids, the weed stops growing immediately. Leaves turn yellow (chlorosis), then brown (necrosis), and the weed dies completely within 7–14 days.
Note: Rice plants naturally detoxify this chemical rapidly, which is why your crop remains safe while the weeds die.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Rice (Nursery) | Barnyard Grass (Echinochloa crus-galli) |
| Rice (Transplanted) | Smallflower Umbrella Sedge (Cyperus difformis) |
| Direct Seeded Rice (DSR) | Jungle Rice (Echinochloa colonum), Water Primrose |
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) |
|---|---|---|---|---|
| Paddy (Rice) | 80 - 100 ml | 120 - 150 L | 0.6 - 0.8 ml | Safe at Harvest |
| Heavy Weed Infestation | 120 ml | 150 L | 0.8 ml | Safe at Harvest |
| Nursery | 10 - 20 ml | 15 - 30 L | 0.6 ml | - |
*PHI = Pre-Harvest Interval: The product degrades quickly (10-13 day half-life) and is residue-free in grain at harvest time.
How to Apply: Best Practices
- Timing: Apply when weeds are in the 2 to 5-leaf stage.
- Nursery: 10-12 Days After Sowing.
- Transplanted: 10-14 Days After Transplanting.
- DSR: 15-25 Days After Sowing.
- Mixing: Shake the bottle well. Use clean water. Do NOT use muddy water as it reduces efficacy.
- Coverage (Drain-Spray-Flood):
- Drain water from the field to expose weed leaves.
- Spray evenly using a Flat Fan or Flood Jet nozzle.
- Flood the field again after 2-3 days and hold water for 5-7 days to suppress new weeds.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid drift into fish ponds.
Frequently Asked Questions
1. Can I use Benister if it is about to rain?
No. You need at least 6 hours of rain-free weather after spraying for the medicine to be absorbed by the weeds.
2. Can I mix Benister with other insecticides?
It is generally compatible with Imidacloprid. However, DO NOT mix it with Organophosphates (like Chlorpyrifos) or sulfur-based products, as this can damage the rice crop.
3. Why did the weeds turn yellow but not die immediately?
Benister is a systemic herbicide. It stops the weed's growth instantly, but visual death (browning/drying) takes 7 to 14 days. Be patient; the weed is no longer harming your crop.
4. Is it safe for fish or aquaculture?
No. Bispyribac-sodium is toxic to aquatic life. Do not use in fields where you are farming fish, and avoid runoff into nearby ponds.
5. What nozzle should I use for spraying?
Always use a Flat Fan or Flood Jet nozzle. Avoid Cone nozzles, as they create a fine mist that drifts and evaporates too quickly.
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. To prevent resistance, rotate this product with herbicides of a different mode of action.
