Gayab Herbicide (Atrazine 50% WP) by Coromandel
The Ultimate Pre-Emergence Weed Solution for Maize and Sugarcane.
Gayab (Atrazine 50% WP) is a trusted herbicide from the house of Coromandel (Gromor) designed to protect your crop yield from day one. Specifically formulated for Maize (Corn) and Sugarcane, it acts as a powerful barrier against a wide range of broadleaf and grassy weeds.
By stopping weeds before they emerge, Gayab replaces expensive manual weeding and ensures your crop gets 100% of the soil nutrients and sunlight.
Why Choose This Product? Key Benefits
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Saves Labor & Time: Replaces the need for manual weeding, which is costly and difficult to manage during labor shortages.
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Broad Spectrum Protection: Effectively controls tough broadleaf weeds and grasses like Barnyard grass and Trianthema.
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Long-Lasting Residual Action: Provides extended protection during the critical first 4-6 weeks of crop growth.
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Works with Moisture: Activates perfectly with soil moisture or light rainfall to create a chemical barrier in the topsoil.
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Crop Safe (Selective): Safe for Maize and Sugarcane due to their natural ability to detoxify the chemical (GST enzyme activity).
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Gayab (Coromandel International Ltd) |
| Technical Name | Atrazine 50% WP |
| IRAC MoA Code | Group 5 (Photosystem II Inhibitor) |
| Chemical Group | Chlorotriazine |
| Formulation | Wettable Powder (WP) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Gayab works systemically to stop weeds from generating energy.
- Root Absorption: When applied to the soil, the herbicide is absorbed by the roots of germinating weeds.
- Photosynthesis Blockade: It moves up to the leaves and blocks "Photosystem II," preventing the weed from processing sunlight into food.
- Starvation & Death: The accumulated energy destroys the weed's cell membranes, causing it to turn yellow (chlorosis) and die effectively.
Note: Maize and Sugarcane plants naturally break down this chemical, keeping the crop safe while killing the weeds.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Maize (Corn) | Trianthema monogyna, Digera arvensis, Echinochloa spp. (Barnyard grass), Amaranthus viridis. |
| Sugarcane | Broadleaf weeds, Portulaca oleracea, Xanthium strumarium, and various grasses. |
| Other Crops | Strictly NOT for use on Cotton, Soybean, or Vegetables. |
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 (g / Acre) | Water (L / Acre) | Dose (g / Litre) | PHI (Days) |
|---|---|---|---|---|
| Maize (Light Soil) | 400 g | 200 - 280 L | ~2 g/L | -- |
| Maize (Heavy Soil) | 800 g | 200 - 280 L | ~3 - 4 g/L | -- |
| Sugarcane | 400 - 1600 g | 200 - 280 L | Variable | -- |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Use higher water volume for better soil coverage.
How to Apply: Best Practices
- Timing: Apply as a "Blanket Spray" on the soil immediately after sowing (0-3 days), before weeds or crop emerge.
- Mixing: Gayab is a wettable powder. Premix it with a little water to form a slurry before adding to the tank. Keep the tank agitated (stirred) continuously.
- Coverage: Use a Flat Fan or Flood Jet nozzle. Ensure the soil is moist at the time of application for best results.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid inhaling the spray mist.
Frequently Asked Questions
1. Can I use Gayab on Cotton or Vegetables?
No. Gayab is strictly for Maize and Sugarcane. It will severely damage or kill cotton, soybean, and vegetable crops.
2. Does it kill weeds that have already grown?
Gayab is primarily a Pre-Emergence herbicide. It works best before weeds come up. It has limited control on established weeds.
3. Can I mix Gayab with Paraquat?
Be very careful. Mixing directly can cause "curdling" (clumping) and block nozzles. Always do a small jar test first and dilute them separately.
4. Why do I need to shake the tank?
Since it is a Wettable Powder (WP), the particles settle at the bottom if not stirred. Continuous agitation ensures the right dose is sprayed.
5. Is there an antidote for accidental poisoning?
No specific antidote exists. Treatment is symptomatic. In case of ingestion, seek immediate medical help (gastric lavage is recommended).
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 organisms; do not use near fish ponds or shallow groundwater areas.
