Nichino Mask Fungicide (Metalaxyl 35% WS)
Premium Systemic Seed Treatment for Downy Mildew & Damping-off Control
Nichino Mask is a specialized systemic fungicide formulation containing Metalaxyl 35% WS. Unlike standard sprays, this Water Dispersible Powder for Slurry (WS) is engineered specifically to coat seeds, providing a robust "mask" of protection against deadly Oomycetes (water molds). It acts as a critical insurance policy for high-value crops like Maize, Sorghum, and Sunflower, protecting vulnerable seedlings from soil-borne pathogens for up to 6 weeks.
Why Choose This Product? Key Benefits
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Rapid Systemic Uptake: Absorbed quickly by roots and seeds, moving upward to protect new shoot growth instantly.
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Targeted Oomycete Control: Specifically destroys Downy Mildew, White Rust, and Pythium Damping-off.
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Long-Lasting Defense: Provides a protective window of 2 to 6 weeks, securing the critical seedling establishment phase.
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Superior Adhesion: The WS formulation includes special "stickers" that prevent the chemical from dusting off the seed.
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Eco-Friendly Profile: Seed treatment uses significantly less chemical load per acre compared to foliar sprays, protecting pollinators.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Mask |
| Technical Name | Metalaxyl 35% WS |
| IRAC MoA Code | Group 4 (Phenylamides) |
| Chemical Group | Acylalanine |
| Formulation | WS (Water Dispersible Powder for Slurry) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
- Systemic Absorption: Upon application, Metalaxyl is rapidly absorbed by the seed coat and roots. It translocates acropetally (upwards) through the xylem to new leaves.
- Protein Synthesis Inhibition: It targets the fungal RNA Polymerase I enzyme. This effectively shuts down the fungus's ability to produce ribosomes and proteins, starving the pathogen.
- Protective & Curative: It kills spores on the seed surface (protective) and halts early fungal colonization inside the plant tissue (curative).
Note: Mask is highly specific. It does not control Powdery Mildew or Leaf Spots, only Oomycetes.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Maize (Corn) | Sorghum Downy Mildew, Brown Stripe Downy Mildew, Sugarcane Downy Mildew |
| Sorghum (Jowar) & Pearl Millet (Bajra) | Downy Mildew (Green Ear Disease) |
| Mustard & Sunflower | White Rust (Albugo candida), Downy Mildew |
| Vegetable Nurseries | Damping-off (Pythium spp.), Root Rots |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per 100kg Seed" for accurate results. Do NOT use as a foliar spray.
Dosage per Seed Weight & Nursery Drench
| Crop | Dose (g / 100kg Seed) | Slurry Water (L) | Drench (g / Litre) | PHI (Days) |
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| Maize | 700 g | 0.75 - 1.0 L | N/A | N/A |
| Bajra, Sorghum, Sunflower, Mustard | 600 g | 0.75 - 1.0 L | N/A | N/A |
| Veg Nurseries (Tomato, Chilli) | N/A | As Needed | 1.0 - 1.5 g | N/A |
*PHI is not applicable for seed treatment as the chemical is applied before sowing.
How to Apply: Best Practices
- Timing: Apply to seeds 24 hours before sowing. For nurseries, drench soil immediately after sowing or at first sign of wilt.
- Mixing (Slurry): Mix the required quantity of Mask with a small volume of water (approx 1L water for 100kg seed) to form a thick soup-like slurry.
- Coverage: Pour slurry over seeds in a drum or plastic sheet. Mix mechanically or manually until every seed is uniformly coated (colored).
- Safety: Always wear PPE (gloves, N95 mask, goggles). Do not inhale the powder. Dry seeds in shade, not direct sunlight.
Frequently Asked Questions
1. Can I use Mask as a foliar spray on leaves?
No. Mask is a WS formulation designed for seeds. It contains stickers that may clog spray nozzles and lacks the dispersants needed for effective foliar coverage.
2. Does Mask control fungal leaf spots?
No. It is specific to Oomycetes (Downy Mildew, White Rust, Pythium). It will not kill rusts, smuts, or powdery mildew.
3. Can I mix Mask with other chemical seed treatments?
Yes, it is generally compatible with Imidacloprid (for insect control). Apply the fungicide slurry first, followed by the insecticide.
4. How long does the protection last?
The systemic activity protects the seedling for approximately 2 to 6 weeks, covering the most susceptible early growth stage.
5. What is the shelf life of treated seeds?
Seeds treated with Mask can be stored for several months without losing viability, provided they are kept in cool, dry conditions away from moisture.
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.
