Stroke Pyrithiobac Sodium 10% Ec
Stroke (Pyrithiobac Sodium 10% EC) from Insecticides India Ltd is a selective post-emergence herbicide that controls broadleaf and grassy weeds in rice fields, ensuring cleaner crops and improved yield.
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Stroke Herbicide (Pyrithiobac Sodium 10% EC) by IIL | Broadleaf Weed Control for Cotton
The expert solution for controlling tough broadleaf weeds in cotton crops without manual labor.
Stroke (Pyrithiobac Sodium 10% EC) is a specialized early post-emergence herbicide manufactured by Insecticides (India) Ltd. Designed specifically for Indian cotton agronomy, it effectively eliminates aggressive broadleaf weeds like Carpet Weed (Santhi) and Pigweed (Chaulai) while remaining completely safe for your cotton plants. It acts as a perfect "rescue" tool during the critical initial growth phase (20-25 days), reducing your dependency on expensive manual labor.
Broadleaf Specialist | Crop Safe | Labor Saving
Why Choose Stroke Herbicide? Key Benefits
- ⏱️Drastically Reduces Labor Costs: Replaces the need for 10-15 manual laborers per acre, saving you up to 60% in weeding costs.
- ?️High Crop Safety (Selectivity): Chemically advanced to kill weeds but leave cotton plants unharmed (due to rapid metabolism in cotton).
- ⏳Early Post-Emergence Action: Perfect for the 20-25 day window (2-4 leaf stage of weeds) when pre-emergence chemicals wear off.
- ?️Monsoon Ready (Rainfast): The EC formulation absorbs quickly into leaves and becomes rain-safe within just 2 to 4 hours.
- ?Controls Tough Broadleaf Weeds: Highly effective against notoriously difficult weeds like Trianthema (Carpet weed) and Amaranthus that evade manual hoeing.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Stroke |
| Technical Name | Pyrithiobac Sodium 10% EC |
| IRAC MoA Code | Group 2 (ALS Inhibitor) |
| Chemical Group | Pyrimidinylthiobenzoate |
| Formulation | Emulsifiable Concentrate (EC) |
| Toxicity Label | Blue / Yellow Triangle (Moderate) |
How Stroke Herbicide Works: Mode of Action
Stroke is an ALS Inhibitor. It works by stopping the internal food factory of the weed.
- Absorption: Upon spraying, the chemical is rapidly absorbed by the weed leaves and roots.
- Translocation: It moves through the plant to the growing tips and stops the ALS enzyme, which is needed to make essential proteins (amino acids).
- Elimination: Weed growth stops within 24 hours. Leaves turn yellow/purple in 3-5 days, and the weed dies completely in 14-21 days.
Note: Cotton plants have a natural enzyme system that digests this chemical, keeping the crop safe.
Target Crops & Broadleaf Weeds
| Crop | Target Pest(s) |
|---|---|
| Cotton | Carpet Weed (Trianthema portulacastrum / Santhi) |
| Cotton | Pigweed (Amaranthus viridis / Chaulai) |
| Cotton | Digera arvensis (Tendla) & Chenopodium (Bathua) |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results. Do not under-dose.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (ml / Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Cotton | 250 - 300 ml | 200 L | 1.25 - 1.5 ml | 160 |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Use the higher dose (300 ml) for heavy clay soils.
How to Apply: Best Practices for Maximum Yield
- Timing: Spray when weeds are at the 2 to 4 leaf stage (approx. 20-25 Days After Sowing). Spraying on large weeds is ineffective.
- Mixing: Do NOT mix with Organophosphate insecticides (like Monocrotophos) as this will damage the crop. Maintain a 7-day gap between these sprays.
- Coverage: Use Flat Fan or Flood Jet nozzles. Ensure adequate soil moisture (Wapsa condition) for best results.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid drift to neighboring sensitive crops.
Frequently Asked Questions about Stroke Herbicide
1. Does Stroke control grass weeds?
No. Stroke is specific to Broadleaf (Dicot) weeds like Santhi and Chaulai. It will not kill grasses like Bermuda grass or Barnyard grass.
2. I see yellowing on my cotton leaves after spraying. Is this normal?
Yes, this is known as a "Yellow Flash." It is temporary. The cotton crop will recover its green color within 7-10 days without any loss in yield.
3. Can I mix Stroke with other insecticides?
Do not mix with Organophosphates (OPs). You can generally mix with Pyrethroids, but a jar test is recommended.
4. What is the right time to spray?
The ideal time is when the weeds are small (2 to 4 leaves). If the weeds are too big, they will only be stunned and might recover.
5. How soon does it become rainfast?
Stroke is rainfast within 2 to 4 hours of application.
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 plants; avoid water contamination.