Stigma-Imazethapyr 10% Sl
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Stigma Herbicide (Imazethapyr 10% SL) by Nichino India
The ultimate "Green Label" safety solution for broad-spectrum weed control in Soybean, Groundnut, and Pulses.
Stigma is a premium, selective post-emergence herbicide brought to you by Nichino India (a subsidiary of Japan's Nihon Nohyaku). It is specifically engineered to tackle the "critical period of weed competition" (15–45 days after sowing) in leguminous crops.
Powered by Imazethapyr 10% SL, Stigma offers a dual-action benefit: it works through both leaves and roots to stop weed growth instantly. With its excellent safety profile and systemic action, it ensures your crop gets the nutrients and sunlight it deserves without competing against aggressive weeds like Parthenium, Commelina, and Nutgrass (Motha).
Why Choose This Product? Key Benefits
- ⏱️Early Post-Emergence Action: Perfect for the 1 to 2 weed leaf stage (7–14 days after sowing), stopping weeds before they steal yield.
- ?️Green Label Safety: Classified as "Slightly Toxic" (Green Label), making it safe for the applicator, beneficial insects, and the environment.
- ⏳Residual Control: Provides extended protection by suppressing new weed germination through soil activity for weeks after spraying.
- ?️Rainfastness: Absorbed quickly into the plant system; generally rainfast within 6 hours of application.
- ?Broad Spectrum: One shot controls tough Grassy weeds, Broadleaf weeds, and Sedges (like Cyperus/Motha).
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Stigma |
| Technical Name | Imazethapyr 10% SL |
| IRAC MoA Code | Group 2 (ALS Inhibitor) |
| Chemical Group | Imidazolinone |
| Formulation | Soluble Concentrate (SL) |
| Toxicity Label | Green Label (Slightly Toxic) |
How It Works: Mode of Action
Stigma works by disrupting the protein production factory within the weed.
- Absorption: Upon spraying, the herbicide is rapidly absorbed through both the foliage (leaves) and the roots.
- Translocation: It moves systemically through the plant via the Phloem and Xylem, reaching the growing tips (meristems).
- Inhibition: It targets the ALS enzyme (Acetolactate Synthase), blocking the production of essential amino acids (Valine, Leucine, Isoleucine). Without these proteins, the weed starves, stops growing immediately, and dies within 7–14 days.
Note: Leguminous crops (Soybean/Groundnut) naturally metabolize and detoxify the chemical quickly, ensuring they remain unharmed.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Soybean | Cyperus difformis (Sedge), Echinochloa spp. (Sama/Sanwa), Euphorbia hirta (Dudhi), Commelina benghalensis (Kena), Digera arvensis |
| Groundnut | Cyperus difformis, Commelina benghalensis, Trianthema portulacastrum (Santhi), Eragrostis pilosa |
| Pulses (Urad/Moong) | Mixed weed flora (Broadleaf weeds and Annual Grasses) |
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) |
|---|---|---|---|---|
| Soybean | 400 ml | 200 - 300 L | 1.5 - 2 ml | Consult Label |
| Groundnut | 400 - 600 ml | 200 - 300 L | 2 - 3 ml | Consult Label |
| Pulses | 250 - 300 ml | 200 L | 1.25 - 1.5 ml | Consult Label |
*PHI = Pre-Harvest Interval. Note: Always use sufficient water (min 200L/acre) for post-emergence sprays to ensure thorough weed coverage.
How to Apply: Best Practices
- Timing: Spray strictly when weeds are at the 1 to 2 leaf stage (approx 7-14 Days After Sowing). Late application on mature weeds (4+ leaves) will result in poor control.
- Mixing with Adjuvant: You must use the recommended MSO adjuvant (e.g., Outright). Mix Stigma first, then add the adjuvant (2ml/Liter water). This helps the chemical penetrate waxy weed leaves.
- Coverage: Do not use mist blowers or low water volume. Use a Flat Fan or Flood Jet nozzle to ensure the weeds are fully wetted.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. What happens if it rains after spraying?
Stigma is generally rainfast within 6 hours. If it rains immediately after spraying (within 1-2 hours), efficacy may be reduced. Avoid spraying if rain is imminent.
2. Can I plant Mustard after using Stigma on Soybean?
Great caution is advised. Mustard is highly sensitive to Imazethapyr residues. If rainfall was low during the soybean season, residues may persist and damage the following mustard crop. Wheat or Chickpea are safer follow-up crops.
3. Is an adjuvant really necessary?
Yes. Weeds like Commelina have waxy leaves that repel water. An MSO adjuvant (like Outright) dissolves this wax, allowing Stigma to penetrate and kill the weed.
4. Does it control Purple Nutsedge (Motha)?
Stigma provides effective suppression of Cyperus rotundus (Motha). It stops the sedge from growing, allowing your crop canopy to cover the ground, though it may not completely eradicate established perennial tubers.
5. Is Stigma safe for my farm animals?
Stigma has a "Green Label" (Slightly Toxic), meaning it has very low toxicity to mammals. However, standard safety practices should always be followed, and animals should be kept out of treated fields immediately after spraying.
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.