Active Ingredient Profile and Mode of Action
Mancozeb is a dithiocarbamate contact fungicide with multi-site protective action. It disrupts lipid metabolism, cellular respiration, and enzyme activity in pathogenic fungi.
Because it operates as a multi-site protectant, fungal pathogens rarely develop resistance against Mancozeb, making it an essential tank-mix or rotational partner in disease management programs.
- Formulation type: 75 percent Wettable Powder (WP)
- Action mechanism: Broad-spectrum protective contact fungicide
- Rainfastness: Requires adequate drying time before precipitation occurs
Target Pathogens and Registered Crop Applications
M45 is registered across diverse crops to prevent early and late blight, leaf spot complexes, rusts, and anthracnose.
Application must occur preventively before visible symptom development or at the earliest sign of disease initiation as advised by local extension officers.
- Potato and tomato: Early blight caused by Alternaria solani and late blight by Phytophthora infestans
- Paddy: Blast and brown spot prevention during vegetative and heading phases
- Grapes and vegetables: Downy mildew and anthracnose foliar suppression
Application Guidelines and Safety Protocols
Uniform canopy coverage is necessary because contact fungicides do not translocate systemically within plant tissues.
Operators must use clean spray water, wear standard protective personal gear, and observe recommended waiting periods before crop harvest.
- Mixing: Make a smooth slurry in clean water before pouring into the main sprayer tank
- Waiting period: Consult label leaflet for crop-specific pre-harvest intervals
- Personal safety: Wear mask, eye protection, and rubber gloves during handling
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active chemical in M45 fungicide?
M45 contains Mancozeb 75 percent WP, a broad-spectrum dithiocarbamate contact fungicide.
Is M45 a systemic fungicide?
No, M45 is a protective contact fungicide that forms a protective barrier on plant surfaces to prevent spore germination.
Can M45 be mixed with insecticides?
It can be mixed with compatible non-alkaline insecticides, but physical jar testing is recommended before large-scale tank combination.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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