Romel Fungicide (Metalaxyl 8% + Mancozeb 64% WP)
The Ultimate "Double-Power" Cure for Late Blight & Downy Mildew
Romel is a high-performance systemic and contact fungicide. By combining the curative power of Metalaxyl with the protective shield of Mancozeb, it offers complete control against destructive fungal diseases in Potatoes, Grapes, Black Pepper, and other vegetable crops.
Best For: Controlling Oomycetes (Water Molds) like Late Blight, Downy Mildew, and Phytophthora Foot Rot.
Why Choose This Product? Key Benefits
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Curative "Kick-Back" Action: Stops fungal infection from the inside within 24-48 hours of application.
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Double Protection: Works inside the plant (Systemic) to cure disease and outside (Contact) to kill spores.
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Long-Lasting Control: Protects new leaves and shoots that grow after spraying.
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Rainfast Reliability: Rapidly absorbed by the plant, reducing the risk of wash-off during rains.
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Phytotonic Effect: Keeps crops green and healthy due to Manganese and Zinc content in Mancozeb.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Romel |
| Technical Name | Metalaxyl 8% + Mancozeb 64% WP |
| IRAC MoA Code | Group 4 (Metalaxyl) + Group M03 (Mancozeb) |
| Chemical Group | Phenylamide + Dithiocarbamate |
| Formulation | Wettable Powder (WP) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Romel utilizes a synergistic approach to disease management, preventing fungus from developing resistance easily.
- Systemic Entry (Metalaxyl): It is absorbed by leaves and roots, moving upwards through the plant to inhibit RNA synthesis in the fungus, stopping growth from the inside.
- Contact Shield (Mancozeb): It stays on the leaf surface, creating a toxic barrier that kills fungal spores the moment they try to germinate.
- Resistance Management: The multi-site action of Mancozeb protects the specific action of Metalaxyl, ensuring the product remains effective for longer.
Note: Best used prophylactically (before disease spreads) or at the very first sign of symptoms.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Potato | Late Blight (Phytophthora infestans) |
| Grapes | Downy Mildew (Plasmopara viticola) |
| Mustard & Vegetables | White Rust, Alternaria Blight, Damping Off |
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) |
|---|---|---|---|---|
| Potato | 1,000 g (1 kg) | 400 L | 2.5 g | 49 Days |
| Grapes | 1,000 g (1 kg) | 200 - 400 L | 2.5 g - 5 g | 49+ Days |
| Mustard | 1,000 g (1 kg) | 400 L | 2.5 g | 56 Days |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: Apply preventively when weather is cloudy/humid, or immediately when disease symptoms appear. Do not wait for severe infection.
- Mixing (Slurry Method): Do not dump powder directly into the tank. Mix the required dose with a little water in a bucket to make a smooth paste/cream first, then add to the main tank.
- Coverage: Use Hollow Cone nozzles. Ensure thorough coverage of the underside of leaves where Downy Mildew hides.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Toxic to fish; avoid using near ponds.
Frequently Asked Questions
1. Can Romel cure Late Blight if infection has already started?
Yes, thanks to Metalaxyl, it has curative activity if applied within 24-48 hours of infection. However, for severe infections, contact an expert.
2. Is Romel suitable for kitchen gardens?
Yes, it is available in small packs (25g/100g). It is effective for tomatoes and nursery plants, but strictly follow safety dosage.
3. Can I mix Romel with other chemicals?
It is compatible with most insecticides. WARNING: Do not mix with Bordeaux mixture or Lime Sulphur (alkaline products) as they destroy Mancozeb.
4. What happens if it rains after spraying?
The systemic component (Metalaxyl) is absorbed quickly (within hours), providing rainfastness. However, if it rains immediately after spraying, efficacy may reduce.
5. How many times can I spray Romel?
To prevent resistance, do not apply more than 2-3 consecutive sprays. Rotate with a different type of fungicide.
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. This product is toxic to aquatic organisms; do not contaminate water bodies.
