Repivox Herbicide
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Syngenta Repivox® Herbicide: The Ultimate Solution for Resistant Rice Weeds
An advanced, dual-action "Rescue Herbicide" designed specifically for modern rice farmers facing tough, resistant grassy weeds.
Rice farming is changing. With the shift to Direct-Seeded Rice (DSR) and labor shortages, tough weeds like Leptochloa (Chinese Sprangletop) are becoming harder to kill. Repivox® 60 OD is Syngenta’s premium answer to this challenge. It combines two powerful chemistries in a high-tech Oil Dispersion (OD) formula to clear your fields without stopping your crop's growth.
Best For: Farmers dealing with "weed escapes" and complex mixed weeds in both Transplanted and Direct-Seeded Rice.
Why Choose This Product? Key Benefits
- ⏱️Rapid Rainfastness: Thanks to the OD technology, it sticks to leaves and becomes rain-proof in just 1–3 hours. Perfect for the monsoon season.
- ?️Zero Crop Shock: Unlike other harsh chemicals, Repivox causes no yellowing or stunting. Your rice keeps growing green and healthy.
- ⏳Wide Application Window: It works as a "Rescue Spray." Missed your early spray? Repivox works effectively even at the 3–4 leaf stage (15–25 days).
- ?️Superior Spreading: The oil-based formula ensures the medicine spreads evenly over waxy weed leaves, ensuring total kill.
- ?Leptochloa Specialist: Specifically engineered to kill Leptochloa chinensis and other grasses that survive standard treatments.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Repivox® 60 OD |
| Technical Name | Penoxsulam 1% (10 g/L) + Cyhalofop-butyl 5% (50 g/L) |
| IRAC MoA Code | Group 2 (ALS Inhibitor) + Group 1 (ACCase Inhibitor) |
| Chemical Group | Triazolopyrimidine + Aryloxyphenoxypropionate |
| Formulation | OD (Oil Dispersion) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Repivox uses a "Double Lock" mechanism to fight resistance. It attacks weeds on two different biological fronts, ensuring that if one mechanism misses, the other kills.
- Lipid Synthesis Inhibition (Group A): Cyhalofop-butyl penetrates grass leaves and stops the production of fatty acids (lipids). This destroys the growing points of grasses like Barnyard grass and Leptochloa.
- Amino Acid Blockage (Group B): Penoxsulam inhibits the ALS enzyme, starving the weed of essential proteins. This targets broadleaf weeds and sedges.
- Systemic Action: The herbicide travels through the plant's veins (Phloem and Xylem), killing the weed from leaf tip to root.
Result: Weeds stop growing immediately, turn yellow/brown, and die within 2–3 weeks.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Transplanted Rice | Echinochloa spp. (Barnyard grass), Leptochloa chinensis, Sedges, Broadleaves. |
| Direct Seeded Rice (DSR) | Excellent for resistant grasses and mixed weed flora typical in DSR. |
| Target Sedge/Broadleaf | Cyperus iria, Ludwigia spp., Eclipta prostrata, Marsilea quadrifoliata. |
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) |
|---|---|---|---|---|
| Transplanted Rice | 400 ml | 120 - 150 L | 2.5 - 3.0 ml | 60 |
| Direct Seeded Rice | 500 ml | 150 L | 3.0 ml | 60 |
| High Weed Pressure | 500 ml | 150 L | 3.0 - 3.3 ml | 60 |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: Apply at the 3–4 leaf stage of the weeds. This is usually 15–25 days after transplanting or sowing.
- Mixing: Shake the bottle well before use (Oil Dispersion settles). Do not mix with other chemicals unless advised by an agronomist.
- Coverage (Crucial): Drain the field water before spraying so weeds are fully exposed. Re-flood the field 48–72 hours after application to suppress new weeds.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. Does Repivox cause yellowing (shock) to the paddy?
No. Repivox is highly selective to rice. The crop metabolizes the chemical rapidly, meaning there is zero growth check or phytotoxicity compared to older herbicides like Bispyribac-sodium.
2. Can I use it if it might rain soon?
Yes. The Oil Dispersion (OD) formulation makes it rainfast within 1 to 3 hours. It binds quickly to the waxy leaves of weeds.
3. Why is it more expensive than generic herbicides?
While the bottle cost is higher, it acts as an insurance policy. It kills resistant weeds like Leptochloa that cheap herbicides miss, saving you the cost of a second spray or expensive manual weeding labor.
4. Do I need to drain the water?
Yes, absolutely. For the medicine to work, it must touch the weed leaves. Drain the field to saturation level, spray, and then flood it again after 2-3 days.
5. Can this be used in Direct Seeded Rice (DSR)?
Yes, it is highly recommended for DSR because it effectively controls the complex mix of grasses and broadleaves that compete with rice in aerobic soil conditions.
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.
