Selector Herbicide (Imazethapyr 10% SL) – Complete Weed Control for Soybean & Pulses
Stop weed competition early and boost your yield with the dual-action power of Selector.
Selector (Imazethapyr 10% SL) by Insecticides (India) Ltd is a broad-spectrum systemic herbicide designed specifically for leguminous crops. It solves the labor shortage crisis by providing effective control over grasses, broadleaf weeds, and tough sedges in a single spray. By stopping weeds during the critical 15-45 day window, it ensures your crop gets 100% of the nutrients and sunlight.
Best For: Farmers looking for a cost-effective alternative to manual weeding (saves ~80% cost) in Soybean, Groundnut, and Pulses.
Why Choose This Product? Key Benefits
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Early Control: Acts during the critical 2-4 leaf stage of weeds, preventing yield loss before it begins.
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Crop Safety: Highly selective to legumes; Soybean and Groundnut plants rapidly metabolize it, staying safe while weeds die.
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Double Action: Absorbed by both roots and leaves (systemic), ensuring control even if rain occurs later.
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Rainfastness: Becomes rainfast in just 6 hours. Subsequent rain actually helps by activating root uptake.
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Broad Spectrum: The only solution that controls Grasses, Broadleaf weeds, AND Sedges (Motha) simultaneously.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Selector |
| Technical Name | Imazethapyr 10% SL |
| IRAC MoA Code | Group 2 (ALS Inhibitor) |
| Chemical Group | Imidazolinone |
| Formulation | Soluble Liquid (SL) |
| Toxicity Label | Blue Triangle (Moderate Hazard) |
How It Works: Mode of Action
Selector works by starving the weed of essential proteins required for growth.
- Uptake: The herbicide is absorbed through both the leaves and the roots of the weed.
- Translocation: It moves systematically up and down the plant, accumulating in the growing tips (meristems).
- Inhibition: It blocks the ALS enzyme, stopping the production of amino acids (Valine, Leucine, Isoleucine). The weed stops growing immediately and dies within 10-14 days.
Note: Leguminous crops are safe because they naturally break down the chemical faster than it can harm them.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Soybean | Echinochloa (Sama), Commelina (Kena), Cyperus rotundus (Motha/Sedge), Euphorbia (Dudhi). |
| Groundnut | Trianthema (Sanwa), Commelina, Grasses, and Sedges. |
| Pulses (Urad/Moong) | Mixed flora of annual grasses and broadleaf weeds. |
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 - 600 ml | 200 - 240 L | 2 - 2.5 ml | 75 Days |
| Groundnut | 400 - 600 ml | 200 - 280 L | 2 - 2.5 ml | 90 Days |
| Black/Green Gram | 250 - 400 ml | 150 - 200 L | 1.5 - 2 ml | ~50 Days |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Use lower doses for shorter duration pulses like Moong/Urad to avoid stunting.
How to Apply: Best Practices
- Timing: Apply when weeds are in the 2 to 4 leaf stage. For Soybean, this is usually 15-25 Days After Sowing (DAS). Late application reduces control.
- Mixing: Use clean water. Fill the tank halfway, add the dose, agitate, and fill the rest. Do not mix with insecticides unless advised.
- Coverage: Use a Flat Fan or Flood Jet nozzle for uniform coating. Ensure there is adequate soil moisture; if soil is dry, irrigate before spraying.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. Can I sow Mustard after using Selector in Kharif?
No. Selector has residual soil activity. Sensitive crops like Mustard or vegetables should NOT be planted immediately after harvest. Wheat or Chickpea are safe rotational choices.
2. Does it control Motha (Sedges)?
Yes, Selector is effective against Cyperus rotundus. It may not kill the tuber instantly but will suppress growth for 30-40 days, allowing your crop to take over.
3. What if it rains after spraying?
The product is rainfast after 6 hours. If it rains after this window, efficacy is maintained. Rain helps wash the chemical into the soil for root absorption.
4. My crop turned slightly yellow after spraying. Is this normal?
Yes, a temporary "Yellow Flash" or slight stunting may occur. This is cosmetic; the crop will recover fully within 10-14 days without yield loss.
5. Is it cheaper than manual labor?
Yes. Using Selector reduces weeding costs by approximately 75-80% compared to hiring manual labor for two rounds of weeding.
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 spraying near water bodies.
