Crystal Blue Copper Fungicide - Copper Oxychloride 50% WP for Fungal & Bacterial Disease Control

Crystal Blue Copper is a broad-spectrum copper-based contact fungicide and bactericide manufactured by Crystal Crop Protection Ltd. It contains Copper Oxychloride 50% WP (Wettable Powder) as its active ingredient. This product is designed to manage both fungal and bacterial diseases across a wide range of crops including fruits, vegetables, plantation crops, and cereals.

Crystal Blue Copper works by forming a protective barrier on the plant surface. Its fine copper particles stick well to leaves and gradually release copper ions, which helps restrict the growth and development of disease-causing organisms. Due to its lower solubility, the copper ions are released slowly over time, providing longer-lasting disease protection compared to more soluble copper formulations.

This fungicide is suitable for preventive disease management programs and is also effective against fungi that have developed resistance to other fungicides. It can be used as a foliar spray, soil drench, or seed treatment depending on the crop and disease. Crystal Blue Copper is considered safe for plants with low phytotoxicity when used as per label recommendations.

Key Benefits

• Broad-spectrum disease control: Effectively manages both fungal and bacterial diseases including downy mildew, blight, leaf spot, fruit rot, canker, bud rot, foot rot, rust, and black rot across multiple crops.
• Long-lasting protection: Gradual release of copper ions due to lower solubility provides extended disease control on the plant surface, reducing the need for frequent reapplication.
• Fine particle adhesion: Fine copper particles stick well to leaves and plant surfaces, ensuring better coverage and more effective disease protection under proper spraying practices.
• Effective against resistant fungi: Can help control fungal strains that have become resistant to other fungicides, making it a valuable tool for resistance management programs.
• Low phytotoxicity: Safe for plants with minimal risk of toxic effects when applied as per recommended doses and label guidance.
• Residue-free action: Does not leave harmful residue on crops, making it an eco-friendly option for disease management.
• Versatile application: Can be used as foliar spray, seed treatment, or soil drench depending on crop and disease requirements.

How It Works

Crystal Blue Copper works through contact action. When applied to the plant surface, the fine copper oxychloride particles form a protective layer on leaves, stems, and other plant parts. Due to its lower solubility, the product gradually releases copper ions over an extended period.

These released copper ions are absorbed by fungal spores and bacterial cells on the plant surface. Once inside the target organisms, copper ions interfere with essential cellular processes including enzyme function and protein synthesis. This disrupts the cell membrane integrity and metabolic activity of the pathogens, effectively preventing spore germination, fungal growth, and disease development.

Because the product remains on the plant surface and does not enter the plant's internal system, it acts as a preventive barrier. It is most effective when applied before disease establishment or at the early stages of infection. The gradual release mechanism ensures that a protective concentration of copper ions is maintained on the plant surface for a longer duration, supporting extended disease control.

Technical Specifications

Recommended Dosage & Application

Foliar Spray (General): 1 to 2 grams per litre of water. Spray uniformly on the crop canopy for proper leaf surface coverage.

Seed Treatment (General): Approximately 1 gram per kg of seed.

Pump Sprayer (15 litre): 30 to 45 grams per 15-litre pump.

Field Spray (Acre scale): Approximately 450 grams per acre for broader field applications.

When to Use

Crystal Blue Copper is most effective when used as a preventive treatment before disease symptoms appear or at the very early stages of disease development. Since it works by contact action and forms a protective barrier on the plant surface, applying it before or during early infection helps prevent fungal spores from germinating and spreading.

For crops like grapes, apply when conditions favour downy mildew development such as during humid or rainy weather. For potato, apply at the onset of early or late blight favourable conditions. For tomato and chilli, application during the vegetative and fruiting stages helps protect against leaf spot and blight diseases. For coconut and citrus, apply during the monsoon or humid periods when bud rot and canker are more likely to occur.

Regular monitoring of crop and weather conditions is recommended. Reapply as needed based on disease pressure, rainfall, and crop growth stage, following the label guidance and recommended intervals.

Step by Step Usage Instructions

1. Read the label: Carefully read all instructions and safety precautions on the product label before use.
2. Prepare the spray solution: Fill a clean spray tank with half the required amount of water. Add the recommended dose of Crystal Blue Copper powder to the tank while stirring continuously. Add the remaining water and mix thoroughly until the powder is fully dissolved and uniformly suspended.
3. Check compatibility: If mixing with other agro-inputs, perform a small jar test first to check for any adverse reactions. Mix in the correct order: wettable powders first, then emulsifiable concentrates, then adjuvants.
4. Spray uniformly: Apply the prepared solution uniformly on the crop canopy ensuring complete coverage of leaves, stems, and affected plant parts. Use a properly calibrated sprayer with good pressure for even distribution.
5. Timing: Apply during early morning or late evening when temperatures are lower and wind is calm. Avoid spraying during hot sun, rain, or strong wind.
6. Clean equipment: After application, thoroughly clean all spray equipment with water. Do not dispose of leftover spray solution or rinse water into water bodies.

Compatibility

Crystal Blue Copper is compatible with most commonly used agrochemicals. However, it is advisable to avoid mixing with strongly alkaline substances. Always perform a small jar compatibility test before mixing with other products on a large scale. When tank mixing, add wettable powder formulations first, followed by other formulations, stirring well after each addition.

Precautions & Safety

• Wear proper safety gear including gloves, mask, and goggles while handling and applying the product.
• Avoid inhalation of dust and contact with skin, eyes, or clothing during mixing and application.
• Do not eat, drink, or smoke while handling the product.
• Wash hands and exposed skin thoroughly with soap and water after use.
• Store the product in a cool, dry place away from direct sunlight and moisture.
• Keep away from children, pets, livestock, and food/feed items.
• Avoid spray drift to water bodies, non-target crops, and areas inhabited by beneficial insects.
• Do not contaminate ponds, rivers, or other water sources with product or container residue.

Side Effects & Phytotoxicity

Crystal Blue Copper is not phytotoxic when used as per recommended doses and label instructions. It has low phytotoxicity and is safe for plants under normal use conditions. However, excessive dosage or application under extreme weather conditions (very high temperature or intense sunlight) may cause leaf burn or spotting in sensitive crops. Always follow the recommended dosage and application guidelines to avoid any adverse effects on crops.

PHI / REI & Storage