Contaf Plus Fungicide-(Rallis Crop Protection)
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Contaf Plus (Hexaconazole 5% SC) – Complete Fungicide Guide for High Yields
Discover the superior protection of Contaf Plus by Tata Rallis. This advanced Suspension Concentrate (SC) formula offers powerful broad-spectrum control against Sheath Blight, Powdery Mildew, and Rust.
Unlike older EC formulations, Contaf Plus (Hexaconazole 5% SC) is water-based, making it safer for your crops and more effective in rain. It not only stops fungal diseases but also provides a "Phytotonic Effect"—keeping leaves greener for longer to boost photosynthesis and overall grain yield.
Best For: Rice (Paddy), Mango, Grapes, Groundnut, and Vegetables.
Why Choose This Product? Key Benefits
- ⏱️Triple Action Defense: Works as a Preventive (stops entry), Curative (stops spread inside), and Eradicant (cleans up existing spores).
- ?️Systemic Protection: Rapidly enters the plant and moves upwards (Acropetal) to protect new leaves that grow after spraying.
- ⏳Yield Booster (Phytotonic): Delays aging (senescence) and keeps plants green, leading to better grain filling and fruit quality.
- ?️Superior Rainfastness: The SC technology uses fine particles that stick better to leaves than standard EC powders, reducing wash-off from rain.
- ?Safe for Crops: Water-based formula reduces the risk of leaf burn (phytotoxicity), making it safe even during sensitive flowering stages.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Contaf Plus (Rallis India Ltd) |
| Technical Name | Hexaconazole 5% SC |
| IRAC MoA Code | Group 3 (DMI Fungicide) |
| Chemical Group | Triazoles |
| Formulation | Suspension Concentrate (SC) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Contaf Plus works by targeting the fungal cell membrane. It acts as a Demethylation Inhibitor (DMI).
- Blocks Biosynthesis: It inhibits the enzyme (CYP51) that fungi need to produce Ergosterol, a vital component of their cell walls.
- Cell Collapse: Without Ergosterol, the fungal membrane becomes leaky and unstable, causing the fungus to die.
- Translaminar Movement: The chemical moves across the leaf from top to bottom, killing hidden fungal spores on the underside of the leaves.
Note: This systemic action ensures that even if you miss a spot while spraying, the internal movement helps cover the gap.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Rice (Paddy) | Sheath Blight (Rhizoctonia solani), Brown Spot, Blast |
| Mango & Grapes | Powdery Mildew, Anthracnose |
| Vegetables & Groundnut | Leaf Spots, Tikka Disease, Rust, Powdery Mildew |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results. Under-dosing can lead to resistance.
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 | 40 Days |
| Mango / Fruits | Tree Volume Dependent | As Needed | 1.5 - 2.0 ml | 27 Days |
| Grapes / Groundnut | 200 - 400 ml | 200 L | 1.0 - 1.5 ml | 14 - 30 Days |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. For Rice, do not spray after the milking stage.
How to Apply: Best Practices
- Timing: For Rice, apply at the active tillering stage (40-45 days) or immediately when you see lesions on the sheath. For Mango, apply during flowering to prevent flower drop.
- Mixing: Compatible with most insecticides like Chlorpyrifos and Quinalphos. Always perform a small jar test first. DO NOT mix with alkaline products like Bordeaux mixture.
- Coverage: Direct the nozzle toward the lower leaf sheaths for Rice Sheath Blight. Ensure thorough coating for fruit crops.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid spraying near fish ponds as it is toxic to aquatic life.
Frequently Asked Questions
1. What is the difference between Contaf (EC) and Contaf Plus (SC)?
Contaf Plus uses SC (Suspension Concentrate) technology. It is water-based, safer to handle, has better rainfastness, and provides a stronger greening effect than the older oil-based EC formulation.
2. Can I mix Contaf Plus with other insecticides?
Yes, it is compatible with common insecticides like Chlorpyrifos, Profenofos, and Quinalphos. This helps manage pests like Stem Borers alongside fungal diseases in a single spray.
3. How does this product increase yield?
It has a "phytotonic" effect. By regulating plant hormones (gibberellins), it delays leaf aging and increases chlorophyll, allowing the plant to photosynthesize longer and fill grains better.
4. Is it safe for aquaculture/fish farming?
No. Hexaconazole is toxic to fish. Do not spray near fish ponds and ensure paddy water does not drain into aquaculture areas immediately after application.
5. What is the cost per acre?
At a dosage of 400ml/acre, the estimated cost is between ₹300 – ₹360 per acre. Given that it can save 20-30% of yield from Sheath Blight, it offers a high Return on Investment (ROI).
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.