Fluopyram 21.37% + Trifloxystrobin 21.37% SC Fungicide Uses

Fluopyram 21.37% + Trifloxystrobin 21.37% SC is a combination fungicide that pairs fluopyram, a succinate dehydrogenase inhibitor (SDHI, pyridinyl-ethyl-benzamide group), with trifloxystrobin, a strobilurin (QoI) fungicide. It is registered for use in India under the Insecticides Act, 1968, and is formulated as a suspension concentrate (SC) for foliar spraying. It is registered for purple blotch in onion, powdery mildew and anthracnose in chilli and grape, sheath blight and leaf/neck blast in rice, powdery mildew in okra, and Marssonina blotch, scab and powdery mildew 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.

Mode of Action

This product combines two fungicides with different modes of action. Fluopyram is a succinate dehydrogenase inhibitor (SDHI) — FRAC Group 7. It blocks complex II (succinate dehydrogenase) of the fungal mitochondrial respiratory chain, stopping energy production and halting spore germination, germ-tube growth and mycelial growth. Trifloxystrobin is a strobilurin (QoI, quinone outside inhibitor) — FRAC Group 11. It binds to the Qo site of the cytochrome bc1 complex (complex III), blocking electron transfer in respiration. Fluopyram moves systemically within the plant (translaminar and acropetal movement), while trifloxystrobin is mesostemic, binding to the waxy leaf surface and redistributing through surface vapour and translaminar movement. Because the two actives hit two different target sites, the combination is used to broaden disease control and to reduce the risk of resistance developing compared with relying on a single site of action.

Features & Benefits

• Two modes of action (FRAC Group 7 + FRAC Group 11) in one formulation, which supports resistance management.
• Registered across six crops — onion, chilli, rice, okra, apple and grape — for powdery mildew, anthracnose, purple blotch, sheath blight, blast, scab and Marssonina blotch.
• Preventive (protective) action with early-curative activity when applied at the first appearance of disease.
• Suspension concentrate (SC) formulation that mixes readily with water for uniform tank application.

Recommended Usage of Fluopyram 21.37% + Trifloxystrobin 21.37% 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.

Figures above are converted from the CIB&RC-registered per-hectare rate (1 ha ≈ 2.47 acres): 125+125 to 150+150 g a.i./ha, 500–600 ml formulation/ha and 500 L water/ha for onion, chilli, rice and okra (grape: 750–1000 L water/ha); waiting periods as shown in the table. *Apple is listed by CIB&RC as a fixed mixing concentration — 12.5+12.5 to 15+15 g a.i. (50–60 ml formulation) per 100 litres of water, sprayed at about 10 litres per tree; the actual spray volume depends on the size of the tree and the plant protection equipment used. Always confirm the current dose on your specific product's label before use.

How to Use

1. Identify your crop and 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 and pre-mix it in a small amount of water, then add it to the spray tank and top up to the full volume while stirring.
3. Spray uniformly over the whole canopy, covering both sides of the leaves; in rice, direct the spray towards the lower stem and leaf sheaths for sheath blight.
4. Begin spraying at the first appearance of disease, or preventively when weather is favourable for disease (humid, cloudy conditions).
5. For apple trees, keep the stated concentration (50–60 ml per 100 litres of water) and adjust the total spray volume to the size of the tree.
6. If a repeat spray is needed, follow the interval advised on the product label or by your local agricultural extension office, and rotate with fungicides from other FRAC groups.

Precautions & Safety

• Wear appropriate PPE — mask/respirator, gloves, goggles and full-sleeved clothing — while mixing and spraying, and avoid inhaling spray mist.
• Do not exceed the recommended dose; avoid back-to-back applications of SDHI (Group 7) or strobilurin (Group 11) products on the same crop, and alternate with fungicides from other FRAC groups.
• Respect the waiting period (PHI) before harvest: onion 30 days, chilli 5 days, rice 32 days, okra 5 days, apple 30 days, grape 15 days.
• 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.