Crystal Blue Copper Fungicide (Copper Oxychloride 50% WP)
The Ultimate Dual-Action Shield Against Fungal and Bacterial Crop Diseases
Blue Copper is a broad-spectrum contact fungicide and bactericide containing Copper Oxychloride 50% WP. It acts as a powerful protective shield for your crops, preventing the entry of devastating diseases like Downy Mildew, Late Blight, and Bacterial Cankers.
Unlike standard fungicides that only target fungi, Blue Copper provides double protection by controlling both fungal and bacterial pathogens simultaneously. Its superior "stickiness" ensures it stays on the leaves longer, even during the rainy season, making it an essential tool for Integrated Pest Management (IPM).
Why Choose This Product? Key Benefits
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Immediate Preventive Action: Creates a toxic barrier on the leaf surface preventing fungal spores from germinating.
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Dual Power Protection: Effectively controls both Fungal diseases (like Blights) and Bacterial diseases (like Cankers).
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Long-Lasting Efficacy: The fine particles release Copper ions ($Cu^{2+}$) slowly, providing extended protection for days.
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Superior Rainfastness: Excellent adhesion properties mean it doesn't wash off easily, perfect for monsoon application.
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Resistance Management: A Multi-Site Contact mode of action makes it nearly impossible for pathogens to develop resistance.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Crystal Blue Copper |
| Technical Name | Copper Oxychloride 50% WP |
| IRAC MoA Code | M1 (Multi-Site Contact Activity) |
| Chemical Group | Inorganic Copper |
| Formulation | Wettable Powder (WP) |
| Toxicity Label | Blue/Green Triangle (Harmful) |
How It Works: Mode of Action
Blue Copper works through a sophisticated Multi-Site Action. The active ingredient ($3Cu(OH)_2 \cdot CuCl_2$) acts as a reservoir on the leaf surface.
- Contact & Adhesion: When sprayed, the fine particles stick to the plant surface (phyllosphere).
- Ion Release: Moisture (rain/dew) or fungal acids release active Copper ions ($Cu^{2+}$) from the deposit.
- Pathogen Destruction: These ions penetrate the pathogen, denaturing proteins and disrupting the cell membrane, leading to rapid cell death.
Because it attacks multiple parts of the cell simultaneously, pests cannot easily adapt or become resistant to it.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Grapes & Fruit Crops | Downy Mildew, Anthracnose, Leaf Spot [Image of Downy Mildew on grape leaf] |
| Tomato & Potato | Early Blight, Late Blight, Bacterial Spot |
| Citrus & Pomegranate | Citrus Canker, Bacterial Blight (Oily Spot), Fruit Rot |
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) |
|---|---|---|---|---|
| Vegetables (Tomato, Chilli, Potato) | 500 g | 200 L | 2.5 g | 7 - 10 Days |
| Fruit Crops (Grapes, Citrus, Pomegranate) | 500 - 1000 g | 400 - 500 L | 2.0 - 2.5 g | 21 Days |
| Plantation (Coffee, Cardamom) | 1000 g | 200 - 300 L | 3.0 - 4.0 g | 15 - 20 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 as a preventive measure before disease symptoms appear or immediately upon rain forecast.
- Mixing: Use the "Creaming Method." Mix the powder with a small amount of water to form a smooth paste (slurry) before adding it to the main tank. Maintain agitation.
- Coverage: Use a Hollow Cone nozzle to ensure fine droplets cover both the upper and lower surfaces of the leaves.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use.
Frequently Asked Questions
1. Can I mix Blue Copper with other chemicals?
Yes, it is compatible with most insecticides and antibiotics (like Streptocycline). However, NEVER mix it with acidic products (like Humic acid or amino acids) as this causes leaf burning.
2. Is it safe to spray during flowering?
No. Avoid spraying Copper compounds during the active flowering stage (anthesis) as it may affect pollination and cause flower drop.
3. Is Blue Copper a curative or preventive fungicide?
It is primarily a Preventive (Protectant) fungicide. It stops the disease from entering the plant. For established infections, mix with a systemic curative fungicide.
4. What is the rainfastness of Blue Copper?
It has excellent rainfastness due to its fine particle size. Once the spray dries on the leaf, it resists washing off during light to moderate rains.
5. Can this be used in Organic Farming?
Yes, Copper Oxychloride is generally permitted in organic farming standards (like NPOP) with specific usage restrictions. Check your certification body's guidelines.
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.
