Tebuconazole 25% WG Fungicide Uses

Tebuconazole 25% WG is a systemic, broad-spectrum fungicide from the triazole chemical group, registered for use in India under the Insecticides Act, 1968, formulated as a water-dispersible granule (WG). It is registered for the control of powdery mildew, fruit rot, tikka leaf spot, rust, blast, yellow rust, purple blotch and Alternaria blight across a range of field, plantation and horticultural crops. 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

Tebuconazole belongs to the triazole group of fungicides, part of the wider demethylation-inhibitor (DMI) class — FRAC Group 3. It is systemic and translocated acropetally (upward) within the plant through the xylem. It works by inhibiting the biosynthesis of ergosterol, an essential structural component of fungal cell membranes, by blocking the C-14 demethylase enzyme in the ergosterol production pathway. Without adequate ergosterol, developing fungal cell membranes become structurally unstable, which halts fungal growth, sporulation and further disease spread. Its systemic movement gives protective action ahead of infection as well as early-curative action against infections already established in plant tissue, and it continues protecting new growth that emerges after spraying.

Features & Benefits

• Broad-spectrum control across several disease groups — powdery mildew, rust, blast, leaf spot and blight — on a wide range of field, plantation and horticultural crops from a single fungicide.
• True systemic movement gives protective action plus early-curative activity against infections already present in the plant.
• Systemic uptake means the fungicide continues protecting new growth that emerges after spraying, giving longer-lasting control than purely contact fungicides.
• Water-dispersible granule (WG) formulation that disperses readily in the spray tank with minimal dust compared to wettable powders.

Recommended Usage of Tebuconazole 25% WG Fungicide

The table below gives the recommended dose and water volume per acre for each crop and target disease, 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). Always spray in the recommended water volume for uniform coverage, and confirm against the current product label before use.

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 in kilograms a.i./formulation per hectare; converted here to a practical per-acre spray-tank quantity (1 ha ≈ 2.47 acres) and rounded. The onion figure in the CIB&RC source table was not internally consistent between its active-ingredient and formulation columns (unverified — flagged) — confirm the exact dose for onion purple blotch on your current product label before use. 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 and water volume.
2. Measure the required quantity of Tebuconazole 25% WG and add it directly to the spray tank with water, agitating well to disperse the granules fully before and during spraying.
3. Apply as a fine, uniform spray covering the entire crop canopy, including the underside of leaves and, for blast in paddy, the neck/panicle region.
4. Begin spraying at the first appearance of disease symptoms, or preventively ahead of expected disease pressure during humid, favourable weather.
5. Repeat sprays at 10–15 day intervals if disease pressure continues, or as advised by local agricultural extension, and rotate with fungicides from a different FRAC group to manage the risk of resistance.

Precautions & Safety

• Wear appropriate PPE — mask/respirator, gloves, goggles and full-sleeved clothing — while mixing and spraying, and avoid inhaling spray mist or dust.
• Resistance to triazole (DMI-class) fungicides, including tebuconazole, is a well-documented, real-world concern in several fungal pathogen groups worldwide because of their single-site mode of action; avoid repeated, back-to-back applications on the same crop/disease, and rotate or tank-mix with fungicides from a different resistance group as part of a resistance-management program.
• Follow the recommended dose strictly — both underdosing (poor disease control and greater risk of resistant pathogen populations developing) and overdosing reduce field performance and increase cost.
• Respect the waiting period (PHI) given in the table above and on the current product label before harvesting the treated crop.
• 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 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.