Chemical properties and succinate dehydrogenase inhibition
- Active ingredient: Thifluzamide 24% SC (carboxamide group, FRAC Group 7 / SDHI).
- Mode of action: Inhibits the succinate dehydrogenase enzyme in fungal mitochondrial complex II, disrupting the tricarboxylic acid (TCA) cycle and ATP production.
- Dual systemic mobility: Absorbed through foliage and roots, moving acropetally and basipetally to protect stems, tillers, and foliage.
- Long residual window: Provides sustained protective coverage for 20 to 25 days post-application, reducing the number of seasonal sprays needed.
Approved crop indications and disease spectrum
- Rice (Paddy): Outstanding preventive and curative control of Sheath Blight (Rhizoctonia solani), preventing lodging and empty grains.
- Potato: Highly effective against black scurf and stem canker through tuber dressing or furrow soil application.
- Groundnut: Suppresses stem rot and collar rot caused by Sclerotium rolfsii.
- Corn / Maize: Protects against banded leaf and sheath blight in high-rainfall zones.
Spraying method, equipment, and resistance management
- Application timing: In paddy, apply at the initial sighting of sheath blight lesions on lower leaf sheaths (around maximum tillering or panicle initiation).
- Spray nozzle placement: Direct hollow cone or flat fan nozzles toward the lower stem canopy where sheath blight originates.
- Water volume: Mix in 150 to 200 litres of clean water per acre for thorough basal stem coverage.
- Resistance stewardship: Rotate with strobilurin (QoI) or triazole (DMI) fungicides to maintain long-term fungal sensitivity.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is Thifluzamide 24% SC used for in agriculture?
It is a systemic SDHI fungicide primarily used to control sheath blight in rice and black scurf in potato.
How does Thifluzamide act against fungi?
It inhibits the succinate dehydrogenase enzyme (Complex II) in fungal mitochondria, blocking fungal energy metabolism.
How long does Thifluzamide protection last in paddy?
It provides long residual protective activity of approximately 20 to 25 days following application.
Does Thifluzamide have curative action?
Yes, it has strong preventive action and halts established fungal lesions curatively when applied early.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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