Active ingredient and multi-site mode of action
Mancozeb is a coordination product of zinc ion and manganese ethylene bisdithiocarbamate. Classified under FRAC Group M03, it acts as a broad-spectrum non-specific enzyme inhibitor, disrupting multiple biochemical pathways in fungal cells. Because it attacks numerous metabolic sites, fungi cannot easily develop genetic resistance.
- Active ingredient: Mancozeb 75% WP (wettable powder)
- Chemical group: Dithiocarbamate (FRAC Group M03)
- Nutrient benefit: Delivers secondary trace zinc and manganese nutrition that promotes crop greening
Target diseases and crop protection
- Potato and tomato: Early blight (Alternaria solani) and late blight (Phytophthora infestans).
- Wheat: Brown rust and leaf blight complexes.
- Grapes: Downy mildew and black rot.
- Groundnut: Tikka leaf spot and collar rot (used as seed treatment).
Application timing and spray techniques
Mancozeb is a preventive contact fungicide and must be applied before fungal spores infect leaf tissues. Ensure uniform foliar coverage on both upper and lower leaf surfaces. Repeat sprays at 7 to 10 day intervals during humid, cloudy weather, and always observe approved CIBRC pre-harvest intervals.
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active ingredient in Indofil M-45?
The active ingredient in Indofil M-45 is mancozeb 75% WP, a contact dithiocarbamate fungicide.
Can fungal pathogens develop resistance to Mancozeb?
Resistance is extremely rare because mancozeb acts as a multi-site inhibitor across several fungal enzymes.
Is Indofil M-45 used for seed treatment?
Yes, it is registered for dry and wet seed dressing in crops like groundnut, wheat, and potato tubers to prevent seed-borne rot.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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