Technical composition and contact protective action
Blue Copper contains Copper Oxychloride formulated as a microfine wettable powder (FRAC Group M01).
Key chemical and protective attributes:
- Active composition: Copper Oxychloride 50% Wettable Powder (WP).
- Non-specific protein denaturant: Released cupric ions (Cu²⁺) are absorbed by fungal spores and bacteria, denaturing proteins and precipitating essential cellular enzymes.
- Contact surface barrier: Creates a durable protective layer on the plant cuticle, preventing pathogen spore penetration and tissue invasion.
- Bactericidal activity: Effectively suppresses bacterial phytopathogens, which are unaffected by standard single-site fungicides.
- Minimal resistance risk: Because copper acts on multiple cellular targets simultaneously, fungi and bacteria cannot easily develop resistance.
Target diseases across fruits, vegetables and plantation crops
Blue Copper is approved by the Central Insecticides Board for diverse agricultural crops:
Primary disease applications:
- Citrus: Citrus canker (Xanthomonas axonopodis pv. citri) and gummosis.
- Grapes: Downy mildew and anthracnose leaf spots.
- Tomato and Potato: Early blight, late blight, and bacterial wilt suppression.
- Cardamom, Pepper and Arecanut: Koleroga (rot), foot rot, and black pepper wilt.
- Mango: Anthracnose and bacterial leaf blight.
Preparation, spray guidance and phytotoxicity precautions
Mix Copper Oxychloride thoroughly to achieve an even suspension without clumping. Avoid spraying during extreme midday sun or mixing with highly acidic compounds or organophosphates, as this can release excessive soluble copper and induce leaf scorching (phytotoxicity). Applicators must use proper eye protection and masks, and observe mandatory harvest intervals.
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 (CIBRC) ↗Related on KisanPe
Common questions
What is the active technical ingredient in Blue Copper fungicide?
Blue Copper contains Copper Oxychloride 50% WP, an inorganic contact copper fungicide and bactericide.
Does Blue Copper work against bacterial plant infections?
Yes, the cupric ions released by Copper Oxychloride act as a powerful bactericide against diseases like citrus canker and bacterial leaf spots.
Can Blue Copper cause phytotoxicity on tender foliage?
Yes, spraying during high temperatures or mixing with acidic agrochemicals can cause leaf burning; always follow registered label precautions.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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