Propiconazole 13.9% + Difenoconazole 13.9% EC Fungicide Uses

Propiconazole 13.9% + Difenoconazole 13.9% EC is a dual-triazole systemic fungicide, registered for use in India under the Insecticides Act, 1968, formulated as an emulsifiable concentrate (EC). It is registered for the control of sheath blight and dirty panicle in paddy (rice), powdery mildew and leaf spot in black gram, leaf spot and rust in soybean, and powdery mildew and anthracnose in mango. 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

This product combines two fungicides from the triazole (DMI) chemical group — propiconazole and difenoconazole — that both work by the same core mechanism but complement each other in spectrum and persistence. Both actives are systemic, moving upward (acropetally) through the plant in the xylem, and both inhibit 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, halting fungal growth, sporulation and further disease spread. Propiconazole is fast-acting with strong early-curative activity against infections already present in plant tissue, while difenoconazole is somewhat slower to act but gives longer residual protection; combining the two gives both quick knockdown of existing infection and extended protection of new growth from a single spray.

Features & Benefits

• Broad control spanning sheath blight and dirty panicle in paddy, powdery mildew and leaf spot in black gram, leaf spot and rust in soybean, and powdery mildew and anthracnose in mango, from a single fungicide.
• Dual-triazole combination gives both fast early-curative action (propiconazole) and longer-lasting residual protection (difenoconazole) from one spray.
• True systemic movement means the fungicide continues protecting new growth that emerges after spraying, giving longer-lasting control than purely contact fungicides.
• Emulsifiable concentrate (EC) formulation mixes readily into a stable spray solution for uniform tank application.

Recommended Usage of Propiconazole 13.9% + Difenoconazole 13.9% EC Fungicide

The table below gives the recommended dose per acre, 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.

All 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 per hectare; converted here to a practical per-acre spray-tank quantity (1 ha ≈ 2.47 acres) and rounded. The paddy dose is derived from the source's own mixing-concentration figure (0.7–1.0 ml of formulation per litre of water) applied over the source's stated 500-litre-per-hectare spray volume. 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. Measure the required quantity of Propiconazole 13.9% + Difenoconazole 13.9% EC and add it to the spray tank partly filled with water, then top up to the required volume while agitating, since this is an emulsifiable concentrate (EC) formulation.
3. Apply as a fine, uniform spray covering the entire crop canopy, including the leaf sheath near the waterline for sheath blight in paddy and flower panicles/young fruit for powdery mildew in mango.
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 propiconazole and difenoconazole, 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.