Gem-Mancozeb 64%+Metalaxyl 8% Wp
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Gem Fungicide (Metalaxyl 8% + Mancozeb 64% WP)
The Ultimate Dual-Action Protection for Grapes, Potatoes, and Spices.
Gem is a premium fungicide by Nichino India that combines the systemic power of Metalaxyl with the protective shield of Mancozeb. Designed specifically for tough diseases like Downy Mildew and Late Blight, Gem works inside and outside the plant to stop fungus in its tracks and prevent resistance.
Best Used For: Curative and protective control of Oomycetes (water molds) in high-value crops.
Why Choose This Product? Key Benefits
- ⏱️Curative "Kick-Back" Action: Stops infection even if applied 24-48 hours after the fungus attacks.
- ?️Dual Protection: Metalaxyl enters the plant to kill internal fungus, while Mancozeb forms a shield on the leaf surface.
- ⏳Protects New Growth: The medicine moves upwards (acropetal action) to protect new shoots that grow after spraying.
- ?️Rain Resistance: Rapidly absorbed by the plant within 1-2 hours, ensuring efficacy even during monsoon weather.
- ?Phytotonic Effect: Keeps crops greener for longer (Green Haulm effect), directly boosting yield and quality.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Gem |
| Technical Name | Mancozeb 64% + Metalaxyl 8% WP |
| IRAC MoA Code | Group 4 (Metalaxyl) + Group M3 (Mancozeb) |
| Chemical Group | Phenylamide + Dithiocarbamate |
| Formulation | Wettable Powder (WP) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Gem uses a sophisticated "Synergistic Action" to control fungus at two different levels:
- Systemic Attack (Metalaxyl): It is absorbed by the leaves and roots and moves upwards. It enters the fungal cell and inhibits RNA synthesis, effectively stopping the fungus from growing or reproducing inside the plant.
- Contact Shield (Mancozeb): It stays on the leaf surface and releases compounds that inhibit fungal enzymes. This creates a multi-site barrier that kills spores on contact before they can enter the plant.
- Resistance Management: By combining a single-site systemic (Metalaxyl) with a multi-site contact (Mancozeb), Gem prevents the fungus from developing resistance.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Grapes | Downy Mildew (Plasmopara viticola) [Image of downy mildew on grapes] |
| Potato | Late Blight (Phytophthora infestans) |
| Black Pepper | Phytophthora Foot Rot / Quick Wilt |
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) |
|---|---|---|---|---|
| Grapes | 1000 g | 200 - 400 L | 2.5 g / L | 49 Days |
| Potato / Mustard | 1000 g | 200 L | 2.5 g / L | 49 / 56 Days |
| Black Pepper | 2.5 g per vine | 5 L per vine | Drench | 147 Days |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: Use preventively before disease appears or immediately at the first sign of symptoms (curative). For grapes, apply during vegetative growth and pre-bloom.
- Mixing: Premix the required quantity of Gem in a small amount of water to make a slurry before adding it to the main spray tank. Agitate well.
- Coverage: Ensure thorough coverage of both the upper and lower surfaces of the leaves. For Black Pepper, drench the soil around the root zone thoroughly (rhizosphere).
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid inhalation of dust during mixing.
Frequently Asked Questions
1. Does Gem cure disease after it has started?
Yes, Gem has curative properties. If sprayed within 24-48 hours of infection, the Metalaxyl component can kill the fungus inside the leaf before visible damage spreads.
2. How long does the protection last?
Typically, Gem provides protection for 10-14 days depending on disease pressure and weather conditions.
3. Can I use Gem during harvesting?
No. Gem has a long Pre-Harvest Interval (PHI) (49 days for Grapes/Potato, 147 days for Pepper). It is best used in the early to mid-vegetative stages, not close to harvest.
4. What if it rains after spraying?
Metalaxyl is absorbed within 1-2 hours (rainfast). However, the Mancozeb component needs about 24 hours to dry and adhere properly. A rain-free window of 24 hours provides the best results.
5. How does it help in resistance management?
Fungi often develop resistance to systemic medicines. Because Gem also contains Mancozeb (a multi-site contact fungicide), it kills any resistant spores, keeping the product effective for longer.
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. Avoid spraying near water bodies as it is toxic to fish.