Active Ingredient and Protective Multi-Site Action
Blue Copper is formulated with fifty percent wettable powder of Copper Oxychloride.
When sprayed onto plant surfaces, moisture releases bioactive cupric ions (Cu2+). These ions denature fungal and bacterial proteins, inactivate respiratory enzymes, and disrupt cellular permeability.
Because of this broad multi-site surface action, pathogenic organisms do not develop resistance against copper protectants.
- Formulation: Copper Oxychloride 50 percent Wettable Powder (WP)
- Broad spectrum: Active against fungal blights, rots, and secondary bacterial infections
- Zero resistance risk: Multi-site mode of action prevents pathogen adaptation
Target Diseases and Approved Crop Applications
Blue Copper is approved across diverse agricultural, vegetable, and orchard plantation crops.
It is deployed preventively ahead of rainy weather or disease outbreaks, as well as for nursery drenching to protect tender seedlings.
- Potato and tomato: Early and late blight control, damping-off nursery drenching
- Paddy: Suppression of false smut and bacterial leaf streak
- Citrus and mango: Control of citrus canker, anthracnose, and fruit brown rot
Slurry Preparation, Compatibility, and Precautions
Always make a smooth pre-slurry in a bucket of clean water before adding to the main spray tank to ensure complete powder suspension.
Do not mix with strongly acidic or alkaline substances, or lime-sulfur mixtures, as incompatibility can cause severe leaf scorch.
Maintain continuous tank agitation during spraying to prevent heavy wettable particles from settling.
- Mixing discipline: Prepare a lump-free slurry and agitate tank continuously during operation
- Spray timing: Apply during cool morning or evening hours with high-volume cone nozzles
- Personal protection: Wear rubber gloves, protective clothing, and a dust mask
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active chemical in Blue Copper fungicide?
Blue Copper contains Copper Oxychloride 50% WP, a protective contact copper fungicide and bactericide.
Can Blue Copper be used for seedling nursery drenching?
Yes, nursery bed drenching with Copper Oxychloride protects young seedlings against damping-off caused by Pythium and Rhizoctonia.
Is Blue Copper effective against bacterial diseases?
Yes, cupric ions provide potent antibacterial action, effectively managing diseases like citrus canker and bacterial leaf spots.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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