Contaf Fungicide (Hexaconazole 5%) by Rallis India
The Ultimate Systemic Solution for Sheath Blight, Powdery Mildew, and Rust.
Contaf is a broad-spectrum, systemic fungicide containing Hexaconazole. Trusted by Indian farmers for decades, it provides triple-action protection: it prevents disease, cures existing infections, and keeps plants greener for longer. Whether you are battling Sheath Blight in Paddy or Powdery Mildew in Mango, Contaf offers a cost-effective and powerful defense.
Best For: Paddy (Rice), Mango, Grapes, Groundnut, and Garden plants.
Why Choose This Product? Key Benefits
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Fast Curative Action: Stops fungal growth within 24 to 48 hours, drying up existing lesions and preventing further spread.
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Systemic Protection: The medicine is absorbed by the plant and moves upwards (acropetal), protecting new leaves that grow after spraying.
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Phytotonic "Greening" Effect: It boosts photosynthesis and delays aging, keeping leaves green longer for better grain filling and higher yields.
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Rain Fastness: The advanced formulation (especially Contaf Plus SC) sticks to leaves and resists washing off within 1-2 hours of application.
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Safe for Flowers: The SC formulation is water-based and solvent-free, making it safe to use during sensitive flowering stages in Mango and Grapes.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Contaf / Contaf Plus |
| Technical Name | Hexaconazole 5% EC / SC |
| IRAC MoA Code | FRAC Code 3 (DMI Fungicide) |
| Chemical Group | Triazoles |
| Formulation | EC (Liquid) or SC (Suspension) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Contaf works by targeting the cell walls of the fungus.
- Blocks Energy: It inhibits the production of Ergosterol, a vital component for the fungal cell membrane.
- Destroys Membrane: Without Ergosterol, the fungal cell walls become weak and leaky, causing the fungus to die.
- Stops Spores: It prevents the fungus from producing new spores (Anti-sporulant), stopping the disease from jumping to neighboring plants.
Result: The infection stops, the plant heals, and new growth is protected.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Paddy (Rice) | Sheath Blight |
| Mango | Powdery Mildew |
| Grapes | Powdery Mildew |
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) |
|---|---|---|---|---|
| Rice (Paddy) | 400 ml | 200 L | 2.0 ml | 30 - 40 Days |
| Mango | Per Tree Basis | High Volume | 1.5 - 2.0 ml | 27 - 30 Days |
| Grapes | 200 - 400 ml | High Volume | 0.5 - 1.0 ml | 14 Days |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: For Rice, apply at the "Booting Stage" or immediately when you see the first lesions near the water line.
- Mixing: Do NOT mix with Bordeaux Mixture or alkaline solutions (lime sulfur), as this destroys the medicine. Ensure water pH is 6-7.
- Coverage: Ensure the spray reaches the lower sheaths (for Rice) or the undersides of leaves (for Grapes) for maximum effect.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. Does Contaf help in increasing yield?
Yes. Apart from killing fungus, it has a "phytotonic" effect. It increases chlorophyll, makes leaves greener, and prevents lodging, leading to better grain filling.
2. Can I use Contaf during the flowering stage?
Yes, but the SC formulation (Contaf Plus) is recommended for flowering stages in Mango and Grapes as it is solvent-free and prevents flower burn.
3. Is Contaf rainfast?
Yes. The Contaf Plus (SC) formulation is rainfast within 1-2 hours. The EC formulation generally requires 3-4 hours of dry weather.
4. What is the difference between Contaf EC and Contaf Plus SC?
EC is solvent-based and gives a quick knockdown. SC is water-based, safer for flowers, rainfast, and eco-friendly.
5. Can I mix it with insecticides?
Yes, it is generally compatible with common insecticides like Chlorpyrifos or Imidacloprid. Always perform a small jar test first.
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.
