Chemical properties and multi-site mode of action
- Active ingredient: Copper Oxychloride 50% WP (Wettable Powder), delivering 50% metallic copper equivalent.
- Multi-site cellular disruption: Releases cupric ions (Cu²⁺) on leaf surfaces that denature fungal and bacterial proteins and disrupt enzyme complexes.
- Resistance durability: Due to non-specific multi-site contact activity, target pathogens do not develop resistance, making it an enduring partner for Integrated Disease Management (IDM).
Target crops and major plant diseases
Registered under CIBRC for controlling Citrus canker in lemons and oranges; Downy mildew and Anthracnose in grapes; Early blight and Late blight in potato and tomato; Leaf spot and fruit rot in chillies; and Blister blight and Black rot in tea and coffee plantations.
Preparation, spraying safety and phytotoxicity precautions
- Prepare a smooth slurry with a small volume of water before pouring into the spray tank; maintain regular tank agitation during application.
- Avoid spraying during intense mid-day heat or extreme humidity to prevent chemical leaf burn (phytotoxicity).
- Do not tank-mix with acidic chemicals, thiram, or organophosphate pesticides without verifying compatibility.
- Wear personal protective gear and observe recommended Pre-Harvest Intervals (PHI).
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Directorate of Plant Protection, Quarantine & Storage (CIBRC) ↗Related on KisanPe
Common questions
What is the active chemical composition in Blue Copper fungicide?
The active ingredient is Copper Oxychloride at 50% WP (Wettable Powder) delivering 50% metallic copper equivalent.
Does Blue Copper control bacterial plant infections?
Yes, copper ions exert potent bactericidal action, making Blue Copper highly effective against bacterial diseases like citrus canker and bacterial leaf spot.
Can Blue Copper cause leaf scorch on delicate crops?
Yes, applications during extreme mid-day heat or improper tank-mixing with acidic compounds can cause phytotoxic leaf spotting; spray during cooler morning or evening hours.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
More Crop Protection & Pesticides guides
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