Metri Herbicide (Metribuzin 70% WP) by Rallis India
The Ultimate Broad-Spectrum Weed Eraser for Wheat, Soybean, and Sugarcane.
Struggling with resistant weeds like Phalaris minor (Gulli Danda) or stubborn broadleaves? Metri Herbicide is a powerful, systemic solution formulated by Rallis India (A Tata Enterprise). It effectively stops photosynthesis in weeds, ensuring your crop gets all the nutrition it deserves.
Best For: Farmers seeking a cost-effective alternative to manual weeding in Wheat, Soybean, Potato, Tomato, and Sugarcane.
Why Choose This Product? Key Benefits
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Dual Action Timing: Works effectively as both a Pre-emergence (before weeds appear) and Early Post-emergence spray, giving you flexible application windows.
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Resistance Breaker: Specifically effective against herbicide-resistant weed biotypes, such as Phalaris minor in Wheat, where other chemicals fail.
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Long-Lasting Residual Control: Remains active in the soil for weeks, preventing new weed flushes and keeping your ridges clean.
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Reliable Rainfastness: Becomes rain-safe within 6 hours of application, reducing the risk of wash-off during erratic weather.
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Broad Spectrum Efficiency: A single product that controls both grassy weeds (Monocots) and broadleaf weeds (Dicots), reducing the need for multiple tank mixes.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Metri |
| Technical Name | Metribuzin 70% WP |
| IRAC MoA Code | Group 5 (Photosynthesis Inhibitor) |
| Chemical Group | Triazinone |
| Formulation | Wettable Powder (WP) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Metri acts as a photosynthetic inhibitor. It works by starving the weed of energy.
- Systemic Absorption: The herbicide is absorbed through roots (from soil application) and leaves (from spray), traveling up the xylem to the stems and foliage.
- Energy Blockade: It targets the chloroplasts and blocks the electron transport chain (Photosystem II). This stops the weed from converting sunlight into food.
- Weed Elimination: Without energy, the weeds develop yellowing (chlorosis) between veins, dry out, and die completely within 1 to 2 weeks.
Note: Sunlight is required for the herbicide to activate and show symptoms on the weeds.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Wheat | Phalaris minor (Gulli Danda), Chenopodium (Bathua), Sweet Clover. |
| Soybean | Digitaria, Horse Purslane (Trianthema), Echinochloa. |
| Sugarcane, Potato, Tomato | Cyperus rotundus (Motha), Parthenium, Amaranthus, and broadleaf vines. |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results. Since Metri is a powder, doses are in Grams (g).
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (g / Acre) | Water (L / Acre) | Dose (g / Litre) | PHI (Days) |
|---|---|---|---|---|
| Wheat | 100 - 120 g | 200 L | 0.5 - 0.6 g | 120 |
| Soybean / Potato / Tomato | 200 - 300 g* | 200 L | 1.0 - 1.5 g | 120 (Soy/Pot) / 60 (Tom) |
| Sugarcane | 400 - 500 g | 300 L | 1.3 - 1.6 g | 120 |
*Note for Soybean: Use 300g for Heavy/Clay soils; use 200g for Light soils. *PHI = Pre-Harvest Interval.
How to Apply: Best Practices
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Timing:
Wheat: Post-emergence at 30-35 Days After Sowing (DAS).
Soybean: Strictly Pre-emergence (0-3 DAS) before crop sprouts.
Sugarcane: Pre-emergence (3-5 days) or Early Post-emergence (25-30 days). - Mixing: As this is a Wettable Powder (WP), pre-mix the required quantity in a bucket with a little water to make a slurry before adding to the main tank. Maintain agitation.
- Coverage: Use Flat Fan nozzles for uniform spraying. Ensure sufficient soil moisture is present at the time of application for activation.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid inhalation of dust during mixing.
Frequently Asked Questions
1. Can I use Metri on all Soybean varieties?
No. Some varieties like JS 335 are sensitive to Metribuzin and may suffer damage. Always check varietal tolerance or test on a small patch first.
2. Is it safe to plant Mustard after using Metri in the previous crop?
Metri has a long soil residue. Sensitive crops like Mustard, Lentils, or Sunflower should generally not be planted immediately after a Metri-treated crop. A gap of 8+ months or a soil bioassay test is recommended.
3. Can I use it on sandy soils?
Avoid using Metri on very sandy soils with low organic matter (<2%), as it may leach down to the seeds and affect crop germination.
4. Can I mix Metri with other herbicides?
Yes, it is often tank-mixed (e.g., with Clodinafop for Wheat or Pendimethalin for Soybean) to broaden the weed control spectrum. Always perform a physical compatibility jar test first.
5. What if it rains after spraying?
Metri is rainfast within 6 hours. For Pre-emergence use (Soybean), light rain after 24 hours is actually beneficial to activate the chemical in the soil.
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.
