Thifluzamide 24% SC Fungicide Uses

Thifluzamide 24% SC is a systemic fungicide from the carboxamide (SDHI) 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 paddy (rice), early blight in tomato, and as a seed/tuber treatment against black scurf in potato. 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

Thifluzamide (FRAC Group 7, SDHI/carboxamide) inhibits succinate dehydrogenase, a key enzyme in fungal mitochondrial respiration, blocking the energy production the fungus needs to grow. It has systemic movement within the plant, giving both preventive and curative activity against Rhizoctonia solani, the pathogen responsible for both rice sheath blight and potato black scurf, as well as strong activity against the Alternaria pathogen that causes tomato early blight. When used as a seed/tuber treatment, it is absorbed by the developing sprout and protects it from soil-borne Rhizoctonia infection right from emergence.

Features & Benefits

• Highly effective against Rhizoctonia solani, the pathogen behind both rice sheath blight and potato black scurf, giving useful flexibility across cropping systems.
• Systemic movement gives both preventive and curative action, useful even after initial disease symptoms have appeared.
• Can be used both as a foliar spray (rice sheath blight, tomato early blight) and as a seed/tuber treatment (potato black scurf), covering two different application methods with one active ingredient.
• Suspension concentrate (SC) formulation that mixes into a stable spray solution for uniform tank application.

Recommended Usage of Thifluzamide 24% SC Fungicide

The table below gives the recommended dose and water volume per acre for paddy and tomato foliar sprays, 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). The potato use is a seed/tuber treatment applied before planting, not a foliar spray, and is dosed per 10 kg of tubers. Always spray/treat in the recommended volume for uniform coverage, and confirm against the current product label before use.

Doses for paddy and tomato 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 millilitres formulation per hectare; converted here to a practical per-acre spray-tank quantity (1 ha ≈ 2.47 acres) and rounded. The potato black scurf use is a seed/tuber treatment dosed per 10 kg of seed tubers, applied before planting, as specified in the CIB&RC source table. 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 application method.
2. For paddy and tomato: measure the required quantity of Thifluzamide 24% 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 — for paddy sheath blight, direct spray toward the base of the plant/leaf sheath near the waterline where the disease develops; for tomato early blight, ensure good coverage of lower/older leaves.
4. For potato: prepare the tuber-treatment solution as per the current product label and treat seed tubers just before planting, ensuring even coverage of the tuber surface.
5. Begin foliar sprays at the first appearance of disease symptoms or preventively ahead of expected disease pressure, and repeat at the interval advised by your local agricultural extension if disease pressure continues.

Precautions & Safety

• Wear appropriate PPE — mask/respirator, gloves, goggles and full-sleeved clothing — while mixing, spraying or treating seed tubers, and avoid inhaling spray mist.
• Resistance to SDHI (carboxamide) chemistry can develop with repeated, exclusive use; always use this product as part of a rotation with fungicides from a different FRAC group, and do not exceed the recommended number of applications per season.
• 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.
• Treated seed tubers are for planting only and must never be used for human or animal consumption.
• 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.