Chemical composition and dual synergistic action
- Cymoxanil (8%): Local systemic aliphatic nitrogen compound (FRAC Group 27 / unknown multi-site); penetrates rapidly into leaf tissue, halting fungal mycelial growth within a 24 to 48-hour curative window.
- Mancozeb (64%): Multi-site dithiocarbamate protectant (FRAC Group M03); forms a broad-spectrum protective chemical barrier on the leaf surface, preventing spore germination.
- Kickback curative action: Cymoxanil offers 1 to 2 days of curative action after infection, arresting early incubational fungal development.
- Anti-resistance durability: Combining a penetrant with multi-site contact Mancozeb ensures zero risk of pathogen resistance.
CIBRC approved target crops and diseases
Approved under CIBRC label directions for managing Late blight (Phytophthora infestans) in potato and tomato; and Downy mildew (Plasmopara viticola) in grapes. In potato cultivation during cool, overcast winter periods, spraying this combination arrests disease spread and protects developing tubers from fungal rot.
Application guidelines, dosage and safety
- Standard label dosage is typically 600 to 750 grams per acre diluted in 200 liters of water for field crops.
- Apply preventively or at the earliest appearance of water-soaked foliar lesions using a hollow cone nozzle.
- Ensure complete coverage of both upper and lower leaf surfaces; rain-fast within 2 to 3 hours of application.
- Observe the mandatory Pre-Harvest Interval (PHI) specified on the container before harvesting edible produce.
Official source
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Directorate of Plant Protection, Quarantine & Storage (CIBRC) ↗Related on KisanPe
Common questions
What are the active chemical ingredients in Cymoxanil + Mancozeb WP?
It contains Cymoxanil 8% + Mancozeb 64% formulated as a Wettable Powder (WP).
What is the 'kickback' action of Cymoxanil?
Cymoxanil possesses a 24 to 48-hour curative window, meaning it can cure internal fungal infections if sprayed within 1 to 2 days after spore penetration.
Which major plant diseases does this fungicide combination control?
It is highly effective against Late blight in potato and tomato, and Downy mildew in grapes and cucurbits.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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