Mancozeb 64% + Thiophanate Methyl 12% WP Fungicide Uses

Mancozeb 64% + Thiophanate Methyl 12% WP is a combination fungicide that pairs mancozeb, a multi-site contact fungicide of the dithiocarbamate group, with thiophanate-methyl, a systemic fungicide of the thiophanate (benzimidazole-precursor) group. It is registered for use in India under the Insecticides Act, 1968, formulated as a wettable powder (WP) for foliar spraying. It is registered for the control of late blight, leaf spot, buck eye rot and ring rot in tomato. This page lists its mode of action, key benefits and the recommended dosage as per the Central Insecticides Board & Registration Committee (CIB&RC) official list of approved fungicide uses (Government of India).

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

This product combines two fungicides with different modes of action. Mancozeb is a dithiocarbamate — FRAC Group M03 (multi-site contact activity); it forms a protective film on the leaf and fruit surface and inactivates many fungal enzymes at once, stopping spores from germinating. Thiophanate-methyl is a thiophanate — FRAC Group 1 (MBC fungicides); inside the plant it is converted to carbendazim, which binds to beta-tubulin and stops fungal cell division. It is systemic, moving into the leaf tissue and upwards in the plant, so it also acts on early infections. The combination is used because the contact component protects the surface while the systemic component works inside the plant, and because pairing a single-site fungicide (thiophanate-methyl) with a multi-site partner (mancozeb) helps reduce the risk of resistance.

Features & Benefits

• Two modes of action in one product — multi-site contact (mancozeb, FRAC M03) and systemic (thiophanate-methyl, FRAC 1).
• Protective surface cover plus systemic action that reaches early infections inside the leaf.
• Registered for four tomato diseases — late blight, leaf spot, buck eye rot and ring rot — in a single spray.
• The multi-site mancozeb component helps slow resistance development to the single-site thiophanate-methyl component.
• Wettable powder (WP) formulation that is easy to measure and mix in the spray tank.

Recommended Usage of Mancozeb 64% + Thiophanate Methyl 12% WP Fungicide

The table below gives the recommended dose, water volume and waiting period per acre, converted from the CIB&RC-registered per-hectare rate — see the note below the table for conversion details. Always confirm against the current product label before use.

Figures above are converted from the CIB&RC-registered per-hectare rate (1 ha ≈ 2.47 acres): 1140 g a.i./ha, 1500 g formulation/ha, 750 L water/ha, waiting period 7 days. Always confirm the current dose on your specific product's label before use.

How to Use

1. Identify the disease from the symptom guide above and confirm the dose from the table.
2. Make a smooth paste of the measured powder in a small quantity of water first, then add it to the half-filled spray tank and top up to the full volume while stirring.
3. Spray uniformly with a knapsack or power sprayer, covering both sides of the leaves, the stems and the fruit, including the lower fruit near the soil where buck eye rot starts.
4. Start spraying at the first sign of disease or when cool, humid weather favours late blight, and repeat as advised by your local agricultural extension office.
5. Spray in calm weather in the early morning or late evening, and avoid spraying if rain is expected within a few hours.

Precautions & Safety

• Wear appropriate PPE — mask/respirator, gloves, goggles and full-sleeved clothing — while mixing and spraying, and avoid inhaling the powder or spray mist.
• Respect the 7-day waiting period (PHI) before harvesting the treated tomato crop.
• Avoid repeated back-to-back sprays of benzimidazole-type fungicides (FRAC Group 1, such as thiophanate-methyl and carbendazim); rotate with fungicides from a different group.
• Follow the recommended dose strictly; do not mix with other pesticides unless specifically recommended.
• Do not let spray wash or rinse water reach ponds, fish tanks, streams or drinking-water sources.
• 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.
• Wash hands, face and any exposed skin thoroughly with soap and water after handling, 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.