Azoxystrobin 8.3% + Mancozeb 66.7% WG Fungicide Uses

Azoxystrobin 8.3% + Mancozeb 66.7% WG is a combination fungicide that pairs azoxystrobin, a strobilurin (QoI) fungicide, with mancozeb, a multi-site contact fungicide of the dithiocarbamate group. It is registered for use in India under the Insecticides Act, 1968, and is formulated as water-dispersible granules (WG) for foliar spraying. It is registered for powdery mildew, downy mildew and anthracnose in grape; powdery mildew, leaf spot and anthracnose in chilli; sheath blight, dirty panicle, brown spot and blast in paddy; early and late blight in potato and tomato; Stemphylium blight, purple blotch and downy mildew in onion; Cercospora, Myrothecium and Alternaria leaf spots in soybean; and Cercospora leaf spot, Alternaria leaf spot and anthracnose in pomegranate. 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. Azoxystrobin is a strobilurin (QoI, quinone outside inhibitor) — FRAC Group 11. It binds to the Qo site of the cytochrome bc1 complex in fungal mitochondria, blocking respiration and stopping spore germination and fungal growth; it is translaminar and xylem-mobile, giving protective and early-curative activity. Mancozeb is a dithiocarbamate — FRAC Group M3 (multi-site contact activity). It stays on the plant surface and reacts with many enzymes containing sulphydryl (–SH) groups inside fungal spores, preventing them from germinating. Because mancozeb acts at many sites at once, fungi have a very low risk of developing resistance to it, and it protects the single-site azoxystrobin partner. The combination therefore pairs systemic, single-site action with a protective multi-site barrier on the leaf surface, broadening control and supporting resistance management.

Features & Benefits

• Two modes of action (FRAC Group 11 + FRAC Group M3) in one formulation; the multi-site mancozeb partner lowers the risk of resistance to azoxystrobin.
• Registered on eight crops — grape, chilli, paddy, potato, tomato, onion, soybean and pomegranate — for blights, mildews, anthracnose, blast, sheath blight and leaf spots.
• Combines a surface protective layer (mancozeb) with systemic, translaminar protection inside the leaf (azoxystrobin).
• Water-dispersible granule (WG) formulation that is easy to measure and disperses readily in water with little dust.

Recommended Usage of Azoxystrobin 8.3% + Mancozeb 66.7% WG 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): 124.5+1000 g a.i./ha and 1500 g formulation/ha for all crops, with 500 L water/ha (grape: 500–750 L water/ha depending on crop canopy); waiting periods as shown in the table. *CIB&RC also lists a second grape entry as a fixed mixing concentration — 0.23% a.i. / 0.30% formulation (about 3 g of product per litre of water), sprayed in 750–1000 L water/ha; the actual spray volume depends on the vine canopy. Always confirm the current dose on your specific product's label before use.

How to Use

1. Identify your crop and disease from the symptom guide above and confirm the dose and water volume from the table.
2. Weigh the required quantity of granules, pre-mix them in a bucket of water until fully dispersed, then add to the half-filled spray tank and top up to the full volume while stirring.
3. Spray uniformly over the whole canopy, covering both upper and lower leaf surfaces; in paddy, direct the spray towards the lower stem and leaf sheaths for sheath blight.
4. Begin spraying at the first appearance of disease, or preventively when cool, humid or cloudy weather favours disease.
5. In grape, adjust the total spray volume to the canopy size while keeping the stated dose or concentration.
6. If a repeat spray is needed, follow the interval advised on the product label or by your local agricultural extension office, and rotate with fungicides from other FRAC groups.

Precautions & Safety

• Wear appropriate PPE — mask/respirator, gloves, goggles and full-sleeved clothing — while mixing and spraying, and avoid inhaling dust or spray mist.
• Do not exceed the recommended dose; avoid repeated back-to-back sprays of strobilurin (FRAC Group 11) products on the same crop.
• Respect the waiting period (PHI) before harvest: grape 21 days, chilli 7 days, paddy 23 days, potato 25 days, tomato 5 days, onion 42 days, soybean 30 days, pomegranate 25 days.
• Do not let spray wash or field 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, moisture, food and feed, and out of reach of children and livestock.
• Wash hands, face and any exposed skin thoroughly with soap and water after 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.