Coromandel Weedax (Paraquat Dichloride 24% SL) Herbicide
The fast-acting, non-selective herbicide for broad-spectrum weed control in agriculture.
Weedax by Coromandel International is a powerful contact herbicide designed to tackle tough weeds in plantation crops, field crops, and non-crop areas. Formulated with Paraquat Dichloride 24% SL, it acts quickly to burn down green vegetation, saving you labor costs and protecting your crop's nutrients.
Best for: Clearing weeds in Tea, Coffee, and Rubber plantations, as well as land preparation (minimum tillage) for Rice, Wheat, and Maize.
Why Choose This Product? Key Benefits
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Rapid Action: See visible results within 24 to 48 hours. It quickly kills green plant tissue on contact.
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Soil Safe: The chemical inactivates immediately upon contact with soil, meaning no harm to your next crop or seedlings.
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Rainfastness: Absorbs quickly into leaves. It remains effective even if it rains shortly after spraying.
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Broad Spectrum: Effectively controls a wide variety of grasses, broadleaf weeds, and aquatic weeds like Water Hyacinth.
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Labor Saver: Acts as a "chemical plough," reducing the need for expensive manual weeding and mechanical tillage.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Weedax |
| Technical Name | Paraquat Dichloride 24% SL |
| IRAC MoA Code | Group 22 (Bipyridylium) |
| Chemical Group | Non-selective Contact Herbicide |
| Formulation | Soluble Liquid Concentrate (SL) |
| Toxicity Label | Restricted Use Pesticide (RUP) - Highly Toxic |
How It Works: Mode of Action
Weedax works via "Lethal Synthesis," turning the plant's own energy against itself.
- Contact Absorption: The active ingredient penetrates the leaf surface almost immediately but does not travel to the roots.
- Photosynthesis Hijack: Inside the plant cells, it intercepts electrons from Photosystem I, stopping the energy production process.
- Cell Membrane Rupture: This reaction creates superoxide radicals ($O_2^{\bullet-}$) and Hydroxyl radicals ($OH^{\bullet}$), which rupture cell membranes, causing the weed to dry out and die rapidly.
Note: This process requires sunlight to activate.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Tea & Coffee | Imperata cylindrica, Setaria sp., Commelina benghalensis, Boerhavia hispida |
| Rice & Wheat (Pre-plant) | Echinochloa crus-galli, Cyperus iria, Chenopodium sp., and general grassy weeds |
| Potato & Maize | Cyperus rotundus, Amaranthus sp., Trianthema monogyna, Chenopodium sp. |
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) |
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| Tea / Coffee / Rubber | 350 - 1000 ml | 150 - 200 L | 2.5 - 5 ml | Refer to Leaflet |
| Rice / Wheat / Maize | 500 - 1400 ml | 150 - 200 L | 3 - 7 ml | Refer to Leaflet |
| Potato / Cotton | 325 - 800 ml | 150 - 200 L | 2 - 4 ml | Refer to Leaflet |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Always check the official product leaflet for specific local guidelines.
How to Apply: Best Practices
- Timing: Apply when weeds are young (2-3 leaf stage) and actively growing for the best kill.
- Mixing: Use clean water. Do NOT mix with alkaline water or alkaline pesticides, as this deactivates the chemical.
- Coverage: Ensure complete wetting of weed foliage. Use a Directed Spray with a hood to avoid drift onto the main crop.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Warning: This product is fatal if swallowed. Never transfer to food/drink bottles.
Frequently Asked Questions
1. Does Weedax kill the roots of the weeds?
No, Weedax is a contact herbicide. It kills the green parts it touches but does not move into the root system. It is best for annual weeds.
2. Is it safe to plant seeds immediately after spraying?
Yes. Weedax becomes biologically inactive as soon as it touches soil particles. You can sow seeds or transplant crops almost immediately after application.
3. What happens if it rains after I spray?
Weedax is rainfast within minutes to hours. Once the liquid dries on the leaf, rain will not wash it off or reduce its efficacy.
4. Can I mix Weedax with other chemicals?
You must avoid mixing it with alkaline substances or anionic surfactants. Always perform a compatibility test or consult an expert before tank mixing.
5. Why is the liquid blue and smelly?
Safety additives are included by law: a blue dye to distinguish it from water, and a stenching agent (bad smell) to prevent accidental ingestion.
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. Note that Paraquat Dichloride is a Restricted Use Pesticide in India due to high toxicity; purchase and use may be regulated in your state (e.g., Odisha, Kerala). There is no specific antidote for Paraquat poisoning.
