Metiram 70% WG Fungicide Uses

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    Metiram 70% WG is a multi-site, contact (protective) fungicide from the dithiocarbamate chemical group, registered for use in India under the Insecticides Act, 1968, formulated as water-dispersible granules (WG). It is registered for the control of Alternaria blight in tomato, tikka in groundnut, late and early blight in potato, downy mildew in grape, blast and brown spot in paddy, anthracnose in chilli and mango, scab in apple, Alternaria fruit spot and anthracnose in pomegranate, Cercospora leaf spot in black gram, Alternaria leaf spot and grey mildew in cotton, purple blotch and Stemphylium blight in onion, Myrothecium leaf spot in soybean and powdery mildew in cucumber. 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.

    Crop Other Names What You'll See in the Field
    Tomato — Alternaria blight Early blight (अगेती झुलसा रोग) Dark brown spots with concentric rings ("target board") on older leaves, with yellowing around them; leaves dry and drop, and dark sunken spots may form on stems and near the stalk end of fruit.
    Groundnut — Tikka Tikka disease (टिक्का रोग) Round, dark brown to black spots on leaves, often with a yellow halo; heavy spotting causes the leaves to fall early and reduces pod filling.
    Potato — Late blight, Early blight Late & early blight (पछेती व अगेती झुलसा रोग) Late blight shows as irregular, water-soaked, dark patches on leaves and stems that spread fast in cool, humid weather, with white fungal growth on the leaf underside; early blight shows as dark brown, ringed ("target board") spots on older leaves.
    Grape — Downy mildew Downy mildew (मृदु रोमिल आसिता) Pale yellow, oily patches on the upper leaf surface with white, downy fungal growth on the underside; young bunches and berries turn brown and shrivel.
    Rice (Paddy) — Blast, Brown spot Blast (झोंका रोग), Brown spot (भूरा धब्बा रोग) Blast shows as spindle- or eye-shaped spots with a grey centre and brown border on leaves, and the panicle neck may blacken and break; brown spot shows as many small, oval, dark brown spots with a grey centre on leaves and on the grain husk.
    Chilli — Anthracnose Anthracnose (एन्थ्रेक्नोज़ / फल सड़न) Sunken, dark, water-soaked spots on ripening fruit with concentric rings of black dots or pinkish spore masses; affected fruit shrivel, rot or drop.
    Apple — Scab Scab (स्कैब / पपड़ी रोग) Olive-green to black, velvety spots on leaves; dark, scabby spots on fruit that crack, and badly affected fruit become misshapen.
    Mango — Anthracnose Anthracnose (एन्थ्रेक्नोज़) Black, sunken spots on flower panicles, young leaves and fruit that enlarge and join, blighting the panicles and causing flower and fruit drop; ripe fruit develop black spots and rot.
    Pomegranate — Alternaria fruit spot, Anthracnose Fruit spot (फल धब्बा), Anthracnose (एन्थ्रेक्नोज़) Small, reddish-brown to black spots on the fruit rind that enlarge and may cause internal rotting of the arils; anthracnose shows as dark, sunken spots on leaves and fruit.
    Black gram — Cercospora leaf spot Leaf spot (सर्कोस्पोरा पत्ती धब्बा) Round to angular spots with a grey centre and reddish-brown border on leaves; in severe cases leaves dry and fall early.
    Cotton — Alternaria leaf spot, Grey mildew Leaf spot (आल्टरनेरिया पत्ती धब्बा), Grey mildew (दहिया रोग) Alternaria leaf spot shows as brown, round spots with concentric rings on leaves; grey mildew shows as pale, angular spots on the leaves with a white to grey frosty powdery growth on the underside, and leaves fall early.
    Onion — Purple blotch, Stemphylium blight Purple blotch (बैंगनी धब्बा रोग), Stemphylium blight (स्टेमफिलियम झुलसा) Purple blotch shows as small, whitish, sunken spots on leaves and seed stalks that grow into purple patches with a yellow margin; Stemphylium blight shows as yellow to orange streaks on one side of the leaf that turn brown, and the leaves dry from the tip.
    Soybean — Myrothecium leaf spot Leaf spot (मायरोथीसियम पत्ती धब्बा) Round to irregular brown spots with a dark border on leaves, often with concentric rings; the centre of the spot may fall out leaving a "shot hole", and badly affected leaves fall early.
    Cucumber — Powdery mildew Powdery mildew (भभूतिया रोग) White, powdery patches on the upper and lower leaf surfaces and stems that spread to cover the whole leaf, which turns yellow and dries early.

    Mode of Action

    Metiram belongs to the dithiocarbamate group of fungicides — FRAC Group M03 (multi-site contact activity). It acts on many enzymes containing thiol (-SH) groups inside the fungal spore at the same time, disrupting several cell processes, including respiration, and so prevents spores from germinating on the plant surface. Metiram is a contact, protective fungicide: it stays on the surface of leaves and fruit and must be applied before infection or at the very start of disease. Because it works on many sites at once, the risk of fungi developing resistance to it is low.

    Features & Benefits

    • Registered across a wide range of vegetable, fruit, cereal, pulse, oilseed and fibre crops — tomato, potato, onion, chilli, cucumber, grape, apple, mango, pomegranate, paddy, black gram, groundnut, soybean and cotton.
    • Multi-site contact action (FRAC Group M03) gives broad protective control with a low risk of resistance developing.
    • Controls blights, leaf spots, downy and powdery mildew, anthracnose, blast and scab from a single fungicide.
    • A useful tank-mix or rotation partner with systemic single-site fungicides in a resistance-management programme.
    • Water-dispersible granule (WG) formulation — low dust, easy to measure and disperses readily in water.

    Recommended Usage of Metiram 70% 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.

    Crop Target Disease Dose per Acre Water Volume per Acre Waiting Period (PHI)
    Tomato Alternaria blight ~1 kg ~200–300 litres 6 days
    Groundnut Tikka ~800 g ~200–300 litres 16 days
    Potato Late blight, Early blight ~800 g ~200–300 litres 17 days
    Grape Downy mildew ~800 g ~200–300 litres 7 days
    Rice (Paddy) Blast, Brown spot ~600–800 g ~200 litres 51 days
    Chilli Anthracnose ~800 g ~200 litres 10 days
    Apple Scab 300 g per 100 litres of water* ~1000 litres 21 days
    Mango Anthracnose 100–125 g per 100 litres of water* Depending upon size of tree 64 days
    Pomegranate Alternaria fruit spot, Anthracnose 150–200 g per 100 litres of water* Depending upon size of tree 10 days
    Black gram Cercospora leaf spot ~500–600 g ~200 litres 34 days
    Cotton Alternaria leaf spot, Grey mildew ~500–600 g ~200 litres 27 days
    Onion Purple blotch, Stemphylium blight ~500–600 g ~200 litres 7 days
    Soybean Myrothecium leaf spot ~500–600 g ~200 litres 35 days
    Cucumber Powdery mildew ~500–600 g ~200 litres 3 days

    Figures above are converted from the CIB&RC-registered per-hectare rate (1 ha ≈ 2.47 acres) and rounded. CIB&RC figures (a.i. / formulation / water per ha / waiting period): tomato Alternaria blight 1750 g / 2500 g / 500–750 L / 6 days; groundnut tikka 1400 g / 2000 g / 500–750 L / 16 days; potato late and early blight 1400 g / 2000 g / 500–750 L / 17 days; grape downy mildew 1400 g / 2000 g / 500–750 L / 7 days; paddy blast and brown spot 1050–1400 g / 1500–2000 g / 500 L / 51 days; chilli anthracnose 1400 g / 2000 g / 500 L / 10 days; black gram, cotton, onion, soybean and cucumber 875–1050 g / 1250–1500 g / 500 L / 34, 27, 7, 35 and 3 days respectively. *Apple, mango and pomegranate are listed as a fixed mixing concentration: apple scab 0.3% or 300 g per 100 L of water, 2500 L water/ha, 21 days; mango anthracnose 70–87.5 g a.i. or 100–125 g formulation per 100 L of water, spray volume depending upon the size of the tree, 64 days; pomegranate 105–140 g a.i. or 150–200 g formulation per 100 L of water, depending upon the size of the tree, 10 days. The CIB&RC also lists mango anthracnose at 87.5 g a.i. / 125 g / 1000 L water and pomegranate at 140 g a.i. / 200 g / 500 L water. The total quantity used depends on the number and size of trees. 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 and water volume from the table.
    2. Measure the required quantity of granules, mix them first in a small quantity of water to form a uniform suspension, then add it to the spray tank and top up to the full volume while stirring; keep agitating during spraying.
    3. Spray uniformly to cover all leaves, stems and fruit on both surfaces; as a protective fungicide, Metiram works best when applied before infection or at the very first symptoms.
    4. For apple, mango and pomegranate, keep the stated concentration and adjust the total spray volume to the size of the tree.
    5. Repeat sprays as advised by your local agricultural extension office if disease pressure continues, since a contact fungicide does not protect new growth that appears after spraying.
    6. 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 dust or spray mist.
    • Follow the recommended dose strictly; do not mix with other pesticides unless specifically recommended.
    • Respect the waiting period (PHI) before harvest given in the table above — it ranges from 3 days for cucumber to 51 days for paddy and 64 days for mango.
    • 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, 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.

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