Hexaconazole 5% SC Fungicide Uses

Hexaconazole 5% SC is a systemic fungicide from the triazole 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 sheath blight in rice (paddy) and powdery mildew in mango and grapes. 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

Hexaconazole belongs to the triazole group of fungicides, part of the wider demethylation-inhibitor (DMI) class. 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 control of sheath blight in rice and powdery mildew in mango and grapes 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.
• Suspension concentrate (SC) formulation that mixes readily into a stable spray solution for uniform tank application.

Recommended Usage of Hexaconazole 5% SC Fungicide

The table below gives the recommended dose per acre for the crop with a per-hectare rate in the source, based on the Central Insecticides Board & Registration Committee's (CIB&RC) official list of approved fungicide uses (Government of India) — see the note below the table for the per-hectare-to-per-acre conversion. Always spray in the recommended water volume for uniform coverage, and confirm against the current product label before use.

The grapes dose above is converted from the official rate published in the CIB&RC's list of approved fungicide uses (Government of India), which states the rate in grams a.i./millilitres formulation per hectare; converted here to a practical per-acre spray-tank quantity (1 ha ≈ 2.47 acres) and rounded. *The mango and rice doses are the CIB&RC source's own figures given directly — for these two crops, the source expresses the rate as a fixed mixing concentration (20 ml per 10 litres of water) rather than a per-hectare/per-acre area rate, so the total spray volume is not fixed and cannot be converted into a per-acre ml figure the way the grapes row above is; mix at this concentration and spray to cover the plant thoroughly. 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 and water volume.
2. Shake the container well before use, then measure the required quantity of Hexaconazole 5% SC and add it to the spray tank partly filled with water, then top up to the required volume while agitating.
3. Apply as a fine, uniform spray covering the entire crop canopy, including flower panicles and young fruit for powdery mildew, and the base of the plant near the waterline for sheath blight in rice.
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.
• Resistance to triazole (DMI-class) fungicides, including hexaconazole, 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.