Active technical content and triazole mode of action
Contaf Plus belongs to the sterol demethylation inhibitor (DMI) triazole class (FRAC Group 3).
Key technical properties:
- Active ingredient: Hexaconazole 5% Suspension Concentrate (SC).
- Ergosterol biosynthesis inhibition: Blocks the fungal enzyme C14-demethylase, arresting the synthesis of ergosterol required for fungal cell membrane construction.
- Systemic acropetal translocation: Rapidly absorbed through leaf cuticles and translocated upward via the xylem, protecting expanding new growth.
- Triple action efficacy: Provides protective barrier defense, curative arrest of established fungal mycelium, and antisporulant suppression of new fungal spores.
- Foliar greening and plant vitality: Imparts a healthy deep green tint to treated foliage, improving photosynthetic performance.
Target fungal diseases and registered crops
Contaf Plus is approved by the Central Insecticides Board for preventative and curative disease control:
Primary target spectrum:
- Paddy (Rice): Sheath blight (Rhizoctonia solani) applied at tillering and boot leaf stages.
- Groundnut: Tikka leaf spot (Cercospora personata and Cercospora arachidicola).
- Grapes and Mango: Powdery mildew (Uncinula necator and Oidium mangiferae).
- Chilli: Powdery mildew and leaf spot suppression.
- Tea: Blister blight (Exobasidium vexans).
Application guidance, dosage and spray timing
Apply Contaf Plus at approved CIBRC label rates (typically 2 ml per litre of water or 400 ml per acre in 200 litres of clean water). Spray preventatively upon detecting early disease lesions or when humid weather favors fungal development. Applicators should wear rubber gloves and protective masks, calibrate nozzles for fine misting, and strictly observe recommended pre-harvest waiting periods.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the active technical ingredient in Contaf Plus fungicide?
Contaf Plus contains Hexaconazole 5% SC, a systemic triazole fungicide.
How does Contaf Plus eliminate fungal infections inside leaves?
It inhibits ergosterol biosynthesis in fungal cell membranes and translocates systemically to stop internal mycelial growth.
Which crops are registered for Contaf Plus application?
It is officially registered for paddy (sheath blight), groundnut (tikka disease), grapes, mango, and chilli.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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