Curzate Fungicide
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Curzate M8 Fungicide (Corteva)
The Expert "Kick-Back" Cure for Late Blight and Downy Mildew.
Curzate M8 is a powerful dual-action fungicide that doesn't just protect your crops—it cures them. By combining the systemic power of Cymoxanil with the protective shield of Mancozeb, it stops disease even if infection has already started. It is the trusted choice for Potato, Grape, and Tomato farmers facing tough monsoon diseases.
Best For: Controlling Late Blight in Potato/Tomato and Downy Mildew in Grapes and Cucumber.
Why Choose This Product? Key Benefits
- ⏱️Rapid Penetration: Enters the leaf tissue in less than 3 hours, ensuring the medicine is inside the plant quickly.
- ?️Dual Action Power: Combines a "Systemic" curative (Cymoxanil) to kill hidden fungus and a "Contact" shield (Mancozeb) to stop new spores.
- ⏳"Kick-Back" Cure: Unique ability to stop infection even 1–3 days after the fungus attacks. Perfect for when rains delay your spray.
- ?️Rainfast Reliability: Because it absorbs quickly, it stays effective even if it rains 3 hours after spraying.
- ?Stops Spore Spread: Acts as an antisporulant, preventing the disease from producing new seeds (spores) and saving healthy plants.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Curzate M8 |
| Technical Name | Cymoxanil 8% + Mancozeb 64% WP |
| IRAC MoA Code | Group 27 (Cymoxanil) + Group M03 (Mancozeb) |
| Chemical Group | Cyanoacetamide oxime + Dithiocarbamate |
| Formulation | Wettable Powder (WP) |
| Toxicity Label | Blue/Yellow (Use with Caution) |
How It Works: Mode of Action
Curzate M8 employs a "Triple Defense" mechanism to ensure complete protection:
- Contact Shield (Preventive): Mancozeb coats the leaf surface. When fungal spores land, it kills them instantly before they can germinate.
- Systemic Kick-Back (Curative): Cymoxanil penetrates inside the leaf within 3 hours. It hunts down fungus that has already entered the plant tissue, stopping infection that is 24-72 hours old.
- Antisporulant (Stop Spread): For existing spots, it stops the fungus from releasing new spores, preventing the disease from jumping to healthy leaves or fruits.
This multi-site action also helps prevent resistance, making it safer to use than single-molecule products.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Potato | Late Blight (Phytophthora infestans) |
| Grapes | Downy Mildew (Plasmopara viticola) |
| Tomato | Late Blight |
| Cucumber | Downy Mildew |
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 | 600 g | 200 L | 3 g | -- |
| Grapes | 600 - 800 g | 200 - 400 L | 2 g | 66 Days |
| Tomato | 600 g | 200 L | 2.5 - 3 g | -- |
*PHI = Pre-Harvest Interval: Critical for Grapes. Do not spray within 66 days of harvest for export safety.
How to Apply: Best Practices
- Timing: Apply immediately when you see the first symptoms (spots) or when weather is cloudy/humid (high disease risk).
- Mixing: This is a Wettable Powder. Mix it with a small amount of water first to make a "slurry," then add it to the full tank.
- Coverage: Ensure full coverage of leaves. For Grapes, use appropriate nozzles to reach the underside of leaves.
- Compatibility: Compatible with most insecticides. Warning: Do not mix with alkaline products like Bordeaux mixture or Lime Sulfur.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. Does Curzate M8 work if it rains after spraying?
Yes. Because Cymoxanil penetrates the leaf within 3 hours, it is considered rainfast. If it rains 3-4 hours after application, re-spraying is usually not needed.
2. Can I use this for export-quality grapes?
Yes, but only during the early vegetative (growth) stages. You must stop using it 66 days before harvest to meet European residue standards.
3. How is it different from normal Mancozeb?
Normal Mancozeb acts only on the surface (preventive). Curzate M8 adds Cymoxanil, which enters the plant to cure infections that have already started inside the leaf.
4. What is the best time to spray for Potatoes?
Start prophylactic sprays in November (North India) or whenever humidity is >90% with cool nights. If spots appear, spray Curzate M8 immediately.
5. Can I mix it with Trichoderma?
Yes. Research suggests Curzate M8 is compatible with Trichoderma, allowing for Integrated Pest Management (IPM).
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. Toxic to aquatic life; do not spray near water bodies.