Active Ingredient and Protective Mode of Action
M-45 contains Mancozeb, a coordination product of zinc ion and manganese ethylene bisdithiocarbamate.
As a multi-site protective fungicide, it disrupts lipid metabolism, respiration, and ATP synthesis across multiple biochemical pathways in target fungal spores.
Because of this broad multi-site inhibition, fungal pathogens do not easily develop chemical resistance against Mancozeb.
- Formulation: 75 percent Wettable Powder (WP)
- Protective action: Multi-site surface contact fungicide preventing spore germination and penetration
- Secondary nutrients: Supplies trace amounts of manganese and zinc nutrients to foliage
Major Crop Diseases Controlled by M-45
M-45 is registered across numerous crops including potato, tomato, paddy, wheat, chili, and grapevine.
Applications must be timed preventively ahead of rainy weather or immediately upon noticing early foliar lesions.
- Potato and tomato: Controls early blight (Alternaria solani) and late blight (Phytophthora infestans)
- Paddy: Suppresses blast (Pyricularia oryzae) and brown spot (Helminthosporium oryzae)
- Horticulture: Controls anthracnose, downy mildew, and rust across vegetables and fruits
Spraying Instructions, Slurry Mixing, and Safety
Always prepare a smooth pre-slurry in a separate container of water before adding to the main spray tank to ensure complete powder suspension.
Maintain continuous tank agitation during spraying and observe recommended pre-harvest intervals before food crop harvest.
- Mixing: Avoid dumping dry powder directly into a full sprayer tank to prevent lump formation
- Uniform coverage: Spray both upper and lower canopy surfaces until leaves are evenly coated
- Personal protection: Wear chemical-resistant gloves, dust mask, and eye goggles during handling
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active chemical in M-45 fungicide?
M-45 contains Mancozeb 75% WP, a broad-spectrum contact dithiocarbamate fungicide.
Does M-45 cure established fungal infections inside the plant?
No, M-45 is a contact protectant; it prevents new spores from infecting but does not translocate systemically inside plant tissues.
Can M-45 be tank-mixed with insecticides?
Yes, M-45 is compatible with most non-alkaline insecticides, though a preliminary jar compatibility test is always recommended.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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