Himil-Metalaxyl + Mancozeb 72% WP
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Himil Fungicide (Metalaxyl 8% + Mancozeb 64% WP)
The "Double-Engine" Protection Against Late Blight & Downy Mildew
Himil is a powerful, systemic, and contact fungicide manufactured by Insecticides (India) Limited. It combines the curative power of Metalaxyl (8%) with the protective shield of Mancozeb (64%). This dual-action formula not only kills existing fungal infections within the plant but also prevents new spores from germinating on the leaf surface. It is the gold standard for managing Oomycetes diseases like Late Blight in potatoes and Downy Mildew in grapes.
Why Choose This Product? Key Benefits
- ⏱️Curative "Kick-Back" Action: Metalaxyl penetrates the plant tissue to stop established infections within 24 to 48 hours.
- ?️Double-Engine Protection: While Metalaxyl works inside, Mancozeb creates a protective layer outside, killing spores on contact.
- ⏳Systemic Reach: Travels upwards (acropetally) in the plant, protecting new leaves that grow after you have sprayed.
- ?️Rainfastness: Rapid absorption ensures the medicine stays effective even if it rains a few hours after application.
- ?Phytotonic Effect: Keeps crops lush and green (zinc and manganese nutrition), helping them recover from disease stress.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Himil |
| Technical Name | Metalaxyl 8% + Mancozeb 64% WP |
| IRAC MoA Code | Group 4 (Phenylamide) + Group M03 (Dithiocarbamate) |
| Chemical Group | Acylalanine + Dithiocarbamate |
| Formulation | Wettable Powder (WP) |
| Toxicity Label | Yellow (Toxic) / Blue (Caution) |
How It Works: Mode of Action
- Systemic Intervention (Metalaxyl): Absorbed by leaves and roots, it travels inside the plant's xylem. It inhibits ribosomal RNA synthesis ($C_{15}H_{21}NO_4$), effectively stopping the fungus from producing proteins and growing.
- Surface Protection (Mancozeb): Acts as a contact multi-site inhibitor. It stays on the leaf surface and releases toxicants that disrupt fungal lipid metabolism and respiration, killing spores instantly upon contact.
- Resistance Management: The multi-site action of Mancozeb reduces the risk of the fungus developing resistance to Metalaxyl, ensuring long-term efficacy.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Potato | Late Blight (Phytophthora infestans) |
| Tomato | Late Blight, Early Blight |
| Grapes | Downy Mildew (Plasmopara viticola) |
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) |
|---|---|---|---|---|
| Potato | 1000 g | 400 L | 2.5 g | 60 |
| Tomato | 800 - 1000 g | 200 - 300 L | 2.5 g | 49 |
| Grapes | 800 - 1000 g | 200 - 400 L | 4.0 - 5.0 g | 49+ (Check Export Rules) |
*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 (before disease starts) or immediately at the first sign of disease. For curative action, spray within 48 hours of infection.
- Mixing: Fill the tank halfway with water. Pre-mix the Himil powder in a separate bucket to make a slurry (cream-like paste), then pour it into the tank while stirring.
- Coverage: Ensure thorough coverage of the foliage, especially the undersides of leaves where fungal spores often hide.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid inhaling the spray mist.
Frequently Asked Questions
1. Can Himil cure Late Blight after it appears?
Yes, but timing is critical. Himil has a curative "kick-back" effect if applied within 24 to 48 hours of infection. If the disease is advanced (plants are black/rotting), it may be too late to save those specific leaves.
2. Is Himil compatible with other insecticides?
Yes, Himil is generally compatible with common insecticides like Imidacloprid and Thiamethoxam. However, never mix it with alkaline products like Bordeaux Mixture or Lime Sulphur.
3. Can I use Himil for seed treatment?
No. This 72% WP formulation is for foliar spray. For seed treatment, use Himil Gold (Metalaxyl 35% WS), which is specifically formulated to stick to seeds.
4. What is the rainfastness of Himil?
Metalaxyl is absorbed rapidly into the plant system. Once the spray dries on the leaf (usually 2-3 hours), it is rainfast and will not wash off easily.
5. Why is the Pre-Harvest Interval (PHI) so long?
Because Metalaxyl moves systemically inside the plant, it takes time to break down. For potatoes, you must stop spraying at least 60 days before harvest to ensure the tubers are safe for consumption.
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. Himil contains Mancozeb, which requires strict adherence to safety protocols to avoid reproductive toxicity risks. Do not use near fish ponds or water bodies.