Syngenta Repivox® 60 OD Herbicide (Penoxsulam + Cyhalofop-butyl)
The Ultimate "Rescue" Solution for Resistant Grasses, Sedges, and Broadleaf Weeds in Rice.
Syngenta Repivox® 60 OD is a premium, broad-spectrum post-emergence herbicide designed specifically for rice farmers facing tough weed competition. Unlike older herbicides that may fail against resistant weeds or stunt your crop, Repivox uses advanced Oil Dispersion (OD) technology to deliver powerful control against Leptochloa (Chinese Sprangletop) and Echinochloa without causing the "yellow flash" or crop setback common with other products.
Note: While often searched for as a fungicide, Repivox is strictly a herbicide for weed control.
Why Choose This Product? Key Benefits
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Extended Application Window:
Effective even when applied late (15–25 days after transplanting), acting as a perfect "rescue" shot if pre-emergence sprays fail. -
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Superior Crop Safety:
"Cool" on the crop—it does not cause stunting or yellowing (chlorosis), ensuring your rice continues to grow vigorously immediately after spraying. -
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Dual-Action Power:
Combines two active ingredients ($10 \text{ g/L}$ Penoxsulam + $50 \text{ g/L}$ Cyhalofop-butyl) to kill grasses, sedges, and broadleaves simultaneously. -
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Rainfast Technology:
The advanced Oil Dispersion (OD) formulation locks into weed leaves within 1–2 hours, ensuring performance even in unpredictable monsoon weather. -
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Resistant Weed Specialist:
Specifically engineered to control hard-to-kill weeds like Leptochloa chinensis (Chinese Sprangletop) that often escape other herbicides.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Repivox® 60 OD |
| Technical Name | Penoxsulam 10 g/L + Cyhalofop-butyl 50 g/L |
| IRAC MoA Code | Group 2 (ALS Inhibitor) + Group 1 (ACCase Inhibitor) |
| Chemical Group | Triazolopyrimidine Sulfonamide + Aryloxyphenoxypropionate |
| Formulation | OD (Oil Dispersion) |
| Toxicity Label | Blue/Green Triangle (Caution) *Varies by country |
How It Works: Mode of Action
Repivox attacks weeds through two distinct pathways, ensuring a "clean sweep" of the field:
- Growth Stasis (ALS Inhibition): The Penoxsulam component stops the production of essential amino acids. Weeds stop growing immediately, even if they stay green for a few days.
- Membrane Destruction (ACCase Inhibition): The Cyhalofop-butyl component blocks fatty acid synthesis in grasses. This destroys cell membranes, leading to "dead heart" in grasses and rapid drying.
- Systemic & Contact: It works through both contact (leaves) and systemic action (roots), moving through the plant to kill underground reproductive structures of sedges.
Result: Weeds stop competing for nutrients within hours, with complete death visible in 14–21 days.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Transplanted Rice (TPR) | Echinochloa spp. (Barnyard grass), Leptochloa chinensis (Chinese Sprangletop), Cyperus spp. (Sedges). |
| Direct Seeded Rice (DSR) | Complex weed flora including Broadleaf weeds (Ludwigia, Monochoria) and Grassy weeds. |
| Wet & Dry Direct Seeding | Resistant biotypes of Grasses and Sedges. |
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 (Standard) | 800 – 900 ml | 150 – 200 L | 4.5 – 5.5 ml | 60 |
| High Resistance Fields | 900 ml | 200 L | 4.5 ml | 60 |
| Low Weed Pressure | 800 ml | 150 L | 5.3 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 2–4 leaf stage of weeds (typically 15–25 Days After Transplanting). Do not apply if weeds are too large (flowering/tillering).
- Mixing: Shake the bottle well before use (OD formulation). Fill the tank halfway with water, add Repivox, and then fill the rest. Do NOT mix with 2,4-D as it reduces grass control efficiency.
- Coverage (Water Management): Drain the field water before spraying to expose weed leaves. Re-flood the field 24–48 hours after application to suppress new weeds.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. Is Repivox a fungicide or a herbicide?
It is a Herbicide. There is a common misconception, but Repivox contains Penoxsulam and Cyhalofop-butyl, which are weed killers. It does not treat fungal diseases.
2. Does it control resistant Chinese Sprangletop (Leptochloa)?
Yes. Repivox is specifically marketed for its superior control of Leptochloa chinensis, especially biotypes that have survived other treatments.
3. Will Repivox turn my paddy yellow?
No. Unlike Bispyribac-sodium based products, Repivox has high crop selectivity and typically causes zero yellowing or phytotoxicity when applied as directed.
4. Can I mix Repivox with 2,4-D for broadleaf control?
No. 2,4-D antagonizes (blocks) the action of Cyhalofop, making it less effective against grasses. Apply 2,4-D separately 5–7 days later if needed.
5. How soon does it become rainfast?
Thanks to its Oil Dispersion (OD) technology, Repivox is rainfast within 1 to 2 hours after application.
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.
