Rifit Herbicide
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Syngenta Rifit Herbicide (Pretilachlor 50% EC)
The Ultimate Pre-Emergence Solution for Weed-Free Rice
Give your paddy crop the perfect start with Syngenta Rifit. Designed specifically for rice ecosystems, this powerful herbicide creates a protective chemical barrier that stops weeds before they emerge.
Best For: Farmers looking for a cost-effective, labor-saving alternative to manual weeding in transplanted and direct-seeded rice.
Why Choose This Product? Key Benefits
- ⏱️Early Action: Kills weeds at the "white thread" stage (germination) to prevent nutrient loss.
- ?️100% Crop Safety: Contains Fenclorim (Safener) which acts like a vaccine, protecting rice while killing weeds.
- ⏳Long Duration Control: Keeps your field weed-free for the critical first 30–45 days.
- ?️Easy Application: Flexible usage—mix with sand, fertilizer, or spray directly.
- ?Greening Effect: Helps the crop establish faster without the "stunting" seen in older herbicides.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Rifit / Rifit Plus / Rifit Xtra |
| Technical Name | Pretilachlor |
| IRAC MoA Code | Group 15 (VLCFA Inhibitor) |
| Chemical Group | Chloroacetanilide |
| Formulation | 50% EC or 37% EW (Emulsion in Water) |
| Toxicity Label | Blue (Slightly Hazardous) |
How It Works: Mode of Action
Rifit works by creating a chemical layer on the soil surface under the paddy water.
- Uptake: As weed seeds germinate, their emerging shoots (coleoptiles) absorb the chemical from the treated soil/water interface.
- Inhibition: The active ingredient stops the production of VLCFAs (Fatty Acids) needed for cell membrane growth. This prevents the weed cells from dividing.
- Elimination: The weed seedling dies before it can surface, while the rice plant (protected by the Safener) grows healthy and unaffected.
Note: Weeds that manage to emerge often show "buggy-whipping" (tightly rolled leaves) and die shortly after.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Transplanted Rice | Barnyard Grass (Echinochloa), Jungle Rice |
| Direct Seeded Rice (DSR) | Annual Grasses, Sedges (Cyperus species) |
| Paddy Nursery | Smallflower Umbrella Sedge, Sprangletop |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Product Variety | Dose (ml / Acre) | Water (L / Acre)* | Method | PHI (Days) |
|---|---|---|---|---|
| Rifit 50 EC | 400 - 500 ml | N/A (Sand Mix) | Sand Mix or Spray | 90 - 110 |
| Rifit Plus (37% EW) | 600 ml | N/A (Sand Mix) | Sand Mix Broadcast | 90 - 110 |
| Rifit Xtra | 500 ml | N/A (Direct) | Splash / Shaker Bottle | 90 - 110 |
*For spray application (rarely used for this product), use 100-120 Liters of water. Sand mix is preferred.
How to Apply: Best Practices
- Timing: Apply within 0 to 5 days after transplanting (DAT). Weeds must be in the germination or 1-leaf stage.
- Mixing (Sand Method): Mix the recommended dose with 10–20 kg of dry sand or granular fertilizer (Urea). Broadcast evenly across the field.
- Coverage: Ensure standing water of 2–5 cm depth in the field. Retain this water for 2–3 days after application. Do not drain!
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. Does Rifit damage the rice crop?
No. Rifit contains a special "Safener" called Fenclorim. This ingredient helps the rice plant detoxify the herbicide immediately, keeping it safe while killing the weeds.
2. Can I apply Rifit if there is no water in the field?
No. Standing water (2-5 cm) is essential. The water acts as the vehicle to spread the chemical evenly across the soil surface.
3. Can I mix Rifit with fertilizers like Urea?
Yes. The "Sand Mix" or "Fertilizer Mix" is the most popular method. You can mix it with Urea or DAP for a "Weed and Feed" application to save labor.
4. What happens if I apply it late (after 7 days)?
Effectiveness drops significantly. Rifit is a pre-emergence herbicide; if the weeds have already grown 2-3 leaves, they may survive the treatment.
5. What is the difference between Rifit and Rifit Plus?
Rifit Plus is a newer, safer formulation (EW) with better spreaders. It causes less "shock" to the crop and spreads better in the water compared to the older Rifit 50 EC.
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. Avoid using in aquaculture ponds as it may be toxic to fish.
