Kresoxim-methyl 44.3% SC Fungicide Uses

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    Kresoxim-methyl 44.3% SC is a broad-spectrum fungicide from the strobilurin (QoI) chemical group, registered for use in India under the Insecticides Act, 1968, formulated as a suspension concentrate (SC). It is registered for the control of blast and sheath blight in paddy, powdery and downy mildew in grapes, powdery mildew, fruit rot, die-back and twig blight in chillies, rust in soybean, early and late blight in potato, leaf spot and grey mildew in cotton, rust and leaf blight in wheat, turcicum leaf blight and rust in maize, grey blight in tea, and blotch and scab in apple. 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
    Rice (Paddy) — Blast, Sheath blight Blast (झोंका रोग), Sheath blight (शीथ ब्लाइट / आवरण झुलसा) Blast shows as spindle- or eye-shaped spots with a grey centre and brown border on leaves, and the neck of the panicle turns black and breaks ("neck blast"), leaving chaffy grain; sheath blight shows as greenish-grey, oval patches with a brown border on the leaf sheath near the water line, spreading upward in a "snake-skin" pattern.
    Grapes — Powdery mildew, Downy mildew Powdery mildew (भभूतिया रोग), Downy mildew (मृदु रोमिल आसिता) Powdery mildew appears as a greyish-white powdery coating on leaves, shoots and berries, which may crack; downy mildew shows as pale yellow, oily patches on the upper leaf surface with white downy growth on the underside, and young bunches dry up.
    Chillies — Powdery mildew, Fruit rot, Die-back, Twig blight Powdery mildew (भभूतिया रोग), Fruit rot (फल सड़न), Die-back / Twig blight (डाई-बैक / टहनी सूखना) White powdery patches on the underside of leaves, with yellowing and leaf fall; sunken, dark, ringed spots on ripening fruit that rot; tender twigs dry from the tip downward and turn brown.
    Soybean — Rust Rust (रतुआ / गेरुई) Small, tan to reddish-brown, raised pustules mainly on the underside of leaves, releasing powdery spores; leaves turn yellow and fall early, and pods fill poorly.
    Potato — Early blight, Late blight Early & late blight (अगेती व पछेती झुलसा रोग) Early blight shows as dark brown spots with concentric rings ("target board") on older leaves; 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.
    Cotton — Leaf spot, Grey mildew Leaf spot (पत्ती धब्बा), Grey mildew (दहिया रोग) Leaf spot shows as brown, round to irregular spots, often with 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 affected leaves fall early.
    Wheat — Rust, Leaf blight Rust (रतुआ / गेरुई), Leaf blight (पत्ती झुलसा) Rust shows as yellow, orange or dark brown powdery pustules in stripes or scattered on leaves and stems that leave colour on the fingers when rubbed; leaf blight shows as brown, irregular spots that join and dry the leaves from the tip.
    Maize — Turcicum leaf blight, Rust Turcicum leaf blight (टर्सिकम पत्ती झुलसा), Rust (रतुआ) Long, cigar-shaped, greyish-green to tan spots on leaves that join and dry large parts of the leaf; rust shows as small, cinnamon-brown powdery pustules on both leaf surfaces.
    Tea — Grey blight Grey blight (ग्रे ब्लाइट / धूसर झुलसा) Brown spots on mature leaves, usually starting at the margin, that turn grey in the centre with concentric rings and small black dots; affected leaves fall early.
    Apple — Blotch, Leaf scab, Fruit scab Blotch (ब्लॉच / धब्बा रोग), Scab (स्कैब / पपड़ी रोग) Blotch shows as brown, round to irregular spots on leaves that cause early leaf fall, and dark, irregular blotches on the fruit; scab shows as olive-green to black velvety spots on leaves and dark, cracked scabby spots on fruit.

    Mode of Action

    Kresoxim-methyl belongs to the strobilurin (QoI, quinone outside inhibitor) group of fungicides — FRAC Group 11. It binds to the cytochrome bc1 complex at the Qo site in fungal mitochondria and blocks electron transfer in respiration, cutting off the energy (ATP) supply of the fungal cell. This stops spore germination and the growth of the fungus on and in the leaf. Kresoxim-methyl has strong preventive action and some curative action; it is taken up by the waxy layer of the leaf and redistributed over the plant surface by vapour movement and translaminar action, giving a long-lasting protective layer.

    Features & Benefits

    • Registered across a wide range of crops — paddy, grapes, chillies, soybean, potato, cotton, wheat, maize, tea and apple.
    • Broad-spectrum control of mildews, blights, rusts, blast, leaf spots, scab and fruit rot from a single fungicide.
    • Strong preventive action with a long-lasting protective layer on the leaf surface, plus some curative activity.
    • Strobilurin (FRAC Group 11) mode of action is a useful rotation partner with triazole and multi-site fungicides in a resistance-management programme.
    • Suspension concentrate (SC) formulation that mixes readily with water for uniform tank application.

    Recommended Usage of Kresoxim-methyl 44.3% SC 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)
    Rice (Paddy) Blast, Sheath blight ~200 ml ~200 litres 30 days
    Grapes Powdery mildew, Downy mildew ~240–280 ml ~200 litres 7 days
    Chillies Powdery mildew, Fruit rot, Die-back, Twig blight ~200 ml ~200 litres 25 days
    Soybean Rust ~200 ml ~200 litres 25 days
    Potato Early blight, Late blight ~200 ml ~200 litres 25 days
    Cotton Leaf spot, Grey mildew ~200 ml ~200 litres 26 days
    Wheat Rust, Leaf blight ~200 ml ~200 litres 34 days
    Maize Turcicum leaf blight, Rust ~200 ml ~200 litres 25 days
    Tea Grey blight ~80 ml ~70 litres 21 days
    Apple Blotch, Leaf scab, Fruit scab 50 ml per 100 litres of water* Based on size of the tree 7 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): paddy blast and sheath blight 250 g / 500 ml / 500 L / 30 days; grapes powdery and downy mildew 300–350 g / 600–700 ml / 500 L / 7 days; chillies 250 g / 500 ml / 500 L / 25 days; soybean rust 250 g / 500 ml / 500 L / 25 days; potato early and late blight 250 g / 500 ml / 500 L / 25 days; cotton leaf spot and grey mildew 250 g / 500 ml / 500 L / 26 days; wheat rust and leaf blight 250 g / 500 ml / 500 L / 34 days; maize turcicum leaf blight and rust 250 g / 500 ml / 500 L / 25 days; tea grey blight 100 g / 200 ml / 175 L / 21 days. *For apple the CIB&RC gives a fixed mixing concentration — 0.025% a.i., i.e. 0.05% or 50 ml formulation per 100 litres of water — with the spray volume based on the size of the tree, waiting period 7 days; 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. Shake the container well, measure the required quantity, mix it first in a small quantity of water, then add it to the spray tank and top up to the full volume while stirring.
    3. Spray uniformly to cover the whole crop canopy, including the underside of leaves; in paddy, cover the lower plant parts for sheath blight and the panicles for neck blast.
    4. Spray preventively when weather favours disease, or at the first appearance of symptoms — strobilurins work best before the disease is established.
    5. For apple, keep the stated concentration and adjust the total spray volume to the size of the tree.
    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 spray mist.
    • Resistance to strobilurin (QoI, FRAC Group 11) fungicides is a known problem because of their single-site action; do not make back-to-back sprays on the same crop, and rotate or tank-mix with fungicides from a different FRAC group.
    • Respect the waiting period (PHI) before harvest given in the table above — 7 days for grapes and apple, 21 days for tea, 25 days for chillies, soybean, potato and maize, 26 days for cotton, 30 days for paddy and 34 days for wheat.
    • Toxic to fish and aquatic life — 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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