Mancozeb 75% WP Fungicide Uses

Mancozeb 75% WP is a broad-spectrum, protectant fungicide from the dithiocarbamate chemical class, registered for use in India across a wide range of field, vegetable and fruit crops. It works purely by contact/protective action with a multi-site mode of action, giving it a very low risk of the target fungus developing resistance. This page lists its mode of action, key benefits and the complete crop-wise recommended dosage as per the Central Insecticides Board & Registration Committee's (CIB&RC) official list of approved fungicide uses.

Which Problem Is This For? (Symptom Guide)

Not sure whether what you're seeing in the field matches this fungicide's use case? This guide helps match symptoms to this fungicide's approved crop-wise uses.

Mode of Action

Mancozeb is a multi-site contact fungicide — rather than blocking one specific enzyme or process in the fungus (a single-site mode of action, which resistance can develop against relatively easily), it interferes with several different cellular processes at once by disrupting enzymes involved in fungal respiration and metabolism. This broad, multi-point disruption is why mancozeb is classified by FRAC (Fungicide Resistance Action Committee) as a very low resistance-risk fungicide (Group M03). It has purely protective/preventive action with no systemic movement, forming a protective film on the leaf and fruit surface that must be present before spores land and germinate — it does not cure an infection that has already established inside plant tissue. Because of this, and because rain or new growth can wash off or dilute the protective film, timely and repeat application ahead of expected disease pressure is essential for good control.

Features & Benefits

• Broad-spectrum control of fungal diseases — leaf spots, blights, rusts, downy mildew and more — across a wide range of field, vegetable and fruit crops.
• Multi-site mode of action gives a very low risk of resistance development, making it an excellent rotation and tank-mix partner alongside single-site systemic fungicides.
• Purely protective/contact action stops new infections from establishing when applied ahead of disease onset.
• Long history of safe, effective use in Indian agriculture, with a CIB-approved label covering field crops, vegetables, fruit trees and seed treatment.

Recommended Usage of Mancozeb 75% WP Fungicide

The table below gives the recommended dose per acre, converted from the official rate published in the Central Insecticides Board & Registration Committee's (CIB&RC) list of approved fungicide uses (Government of India), which is expressed per hectare (1 ha ≈ 2.47 acres). The CIB label does not state a numeric waiting period (PHI) for this formulation on these crops, so always follow the waiting period printed on your specific product's current label.

Doses above are converted from the official rate published in the CIB&RC's list of approved fungicide uses (Government of India), which states the rate per hectare; converted here to a practical per-acre spray-tank quantity (1 ha ≈ 2.47 acres) and rounded. *Guava and Apple are dosed per tree with a fixed spray-tank concentration rather than a per-acre area rate, since spray volume depends on tree size, not area — shown here exactly as published by CIB. The groundnut seed-treatment rate is likewise a fixed per-10kg-seed quantity, not an area-based rate. The CIB list does not separately confirm a dose for soybean, sunflower, onion, beans, cucurbits or ginger under this exact formulation — if your product label recommends this fungicide on one of those crops, follow the pack label rate. Always confirm the current dose on your specific product's label, and consult your local agricultural extension office if in doubt.

How to Use

1. Identify your crop and target disease from the table above, and confirm the correct dose per acre before mixing.
2. First make a thin paste of the required quantity of Mancozeb 75% WP in a small amount of water, then dilute this gradually into the full spray tank volume while stirring continuously, so the wettable powder disperses evenly and does not settle or clog the nozzle.
3. Spray using a knapsack or power sprayer fitted with a flat-fan nozzle for uniform leaf coverage, preferably during the early morning or late evening; avoid spraying in hot, windy conditions or when rain is expected within a few hours, since this is a purely protective fungicide that needs to dry on the leaf surface to be effective.
4. Because mancozeb is only protective (not curative), begin spraying ahead of expected disease pressure — based on local weather/disease-forecast advisories or past field history — rather than waiting for symptoms to appear.
5. Repeat sprays at 7–10 day intervals under high disease pressure, or as advised by local agricultural extension, and always respect the waiting period printed on your product's current label before harvest. Mancozeb's very low resistance risk makes it a good rotation/tank-mix partner alongside single-site systemic fungicides such as metalaxyl-M.

Precautions & Safety

• Wear appropriate PPE — mask/respirator, gloves, goggles and full-sleeved clothing — while mixing and spraying, and avoid inhaling the wettable powder dust while opening the pack.
• Mancozeb is generally compatible with most commonly used insecticides and fungicides, but avoid tank-mixing with strongly alkaline materials; always do a small jar-compatibility test before mixing with an unfamiliar product.
• Store in the original, tightly closed container in a cool, dry place away from direct sunlight, food and feed, and out of reach of children and livestock.
• As a purely protective fungicide, it must be applied before disease appears and reapplied after heavy rain washes off the residue — relying on it after an infection is already visible will not control that infection.
• Always respect the waiting period printed on the current product label before harvest, and follow your local agricultural extension advice for crops not listed above.
• Wash hands, face and any exposed skin thoroughly with soap and water after handling or spraying, and change out of contaminated clothing before eating, drinking or smoking.

Brand names mentioned on this page are registered trademarks of their respective owners and are referenced here for identification purposes only; FarmMate is not affiliated with or endorsed by these brands. This page is for general information only — always consult your local agricultural extension office and confirm the current product label before use.