Coreon Herbicide (Penoxsulam + Butachlor) for Transplanted Rice
The ultimate broad-spectrum solution for weed-free paddy fields.
Coreon Herbicide by Corteva Agriscience is a revolutionary "dual-action" weed killer designed specifically for transplanted rice. It combines the power of two active ingredients—Penoxsulam and Butachlor—to provide complete protection against grasses, sedges, and broadleaf weeds.
Unlike older herbicides that must be sprayed immediately, Coreon offers a flexible application window of 0 to 7 days after transplanting. Its advanced Suspension Emulsion (SE) formulation ensures it spreads evenly across the water, hitting weeds before they can damage your crop yield.
Why Choose This Product? Key Benefits
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Flexible Timing (0-7 Days): Apply anytime within the first week of transplanting, reducing the rush during busy sowing days.
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Dual-Action Power: Combines two chemistries to kill tough weeds and prevent resistance development.
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Long-Lasting Control: Provides residual protection that keeps your field clean during the Critical Period of Weed Competition.
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Rainfast in 2 Hours: Rapid absorption means light rain shortly after application won't wash away the effectiveness.
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Complete Spectrum: Effectively eliminates Grasses, Sedges, and Broadleaf weeds in a single shot.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Coreon Herbicide |
| Technical Name | Penoxsulam 0.97% w/w + Butachlor 38.8% w/w SE |
| IRAC MoA Code | Group 2 (ALS Inhibitor) + Group 15 (VLCFA Inhibitor) |
| Chemical Group | Triazolopyrimidine Sulfonamide + Chloroacetanilide |
| Formulation | SE (Suspension Emulsion) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Coreon utilizes a "Dual-Strike Strategy" to ensure no weed is left behind. This synergy manages resistant weeds that single-molecule herbicides often miss.
- Systemic Attack (Penoxsulam): Absorbed by leaves and roots, it moves through the weed to stop protein production. It is highly effective on broadleaves and sedges.
- Contact & Residual Block (Butachlor): Forms a chemical barrier on the soil surface that stops weed cell division, preventing grass seeds from sprouting.
- The Kick-Back Effect: Because Penoxsulam is systemic, it can kill tiny weeds that have already germinated (up to the 2-leaf stage), providing a safety net if you spray a few days late.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Transplanted Rice | Barnyardgrass (Echinochloa crus-galli), Jungle Rice |
| Transplanted Rice | Rice Flatsedge (Cyperus iria), Umbrella Sedge, Fimbristylis |
| Transplanted Rice | Water Primrose (Ludwigia spp.), Marsilea, Monochoria |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results. The standard 800ml bottle is perfectly calibrated for one acre.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (ml / Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Transplanted Rice | 800 - 900 ml | 120 - 150 L (Spray) | 5 - 6 ml | 90+ |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Since Coreon is applied at planting, residues are naturally degraded well before harvest.
How to Apply: Best Practices
- Timing: Apply strictly between 0 to 7 Days After Transplanting (DAT). Early application gives the best results.
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Mixing:
- Method A (Spray): Mix 800ml in 120-150 liters of water. Use a Flat Fan or Flood Jet nozzle for uniform coverage.
- Method B (Sand Mix): Mix 800ml with 20-25 kg of dry sand or fertilizer and broadcast uniformly.
- Coverage: Maintain standing water (3-5 cm depth) in the field for at least 4 to 5 days after application. Do not drain the water, as this maintains the chemical barrier.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid inhalation of spray mist.
Frequently Asked Questions
1. Can I use Coreon after 7 days of transplanting?
It is not recommended. Coreon is most effective when weeds are just germinating or very small (1-2 leaf stage). Applying it late allows grass weeds to grow too big for control.
2. Does it control sedges like "Motha" (Cyperus)?
Yes! Coreon is excellent against sedges due to the Penoxsulam component, which specifically targets the enzyme systems in sedges and broadleaf weeds.
3. Is it better to spray or use the sand-mix method?
Both are effective. Sand-mix is popular because it saves labor. However, you must ensure there is standing water in the field to help the medicine spread.
4. Is Coreon safe for the rice plants?
Yes, Coreon has high selectivity for rice. The crop metabolizes the chemical safely, while weeds cannot. It does not stunt rice growth when used as directed.
5. What if it rains after application?
Coreon becomes rainfast in about 2 hours. If it rains lightly after this period, the efficacy will not be reduced.
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 organisms; avoid draining water directly into fish ponds.
