DMI Mode of Action and Spectrum of Control
Tebuconazole belongs to the demethylation inhibitor (DMI) triazole class (FRAC Group 3). It inhibits the fungal C-14 demethylase enzyme in ergosterol biosynthesis, disrupting fungal cell membrane integrity and halting fungal hyphal growth.
Its acropetal systemic mobility ensures that the active chemical moves upward through xylem channels to protect expanding foliage.
- Wheat: Yellow rust (Puccinia striiformis) and brown rust.
- Groundnut: Tikka disease (early and late leaf spots) and rust.
- Chilli: Anthracnose fruit rot and powdery mildew.
- Onion & garlic: Purple blotch (Alternaria porri).
- Soybean: Asian soybean rust and foliar blights.
Application Guidelines and Resistance Stewardship
Folicur delivers the highest yield protection when applied preventatively or at the earliest sign of disease symptom appearance.
Rotating with multi-site protectant fungicides ensures long-lasting efficacy against variable fungal populations.
- Apply using calibrated knapsack sprayers fitted with hollow cone nozzles for complete canopy misting.
- Maintain recommended water volume per acre to ensure uniform droplet deposition on both leaf sides.
- Respect the pre-harvest interval (PHI) stipulated on the registered label prior to crop harvest.
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active ingredient in Bayer Folicur?
Folicur contains Tebuconazole 25.9% EC, a broad-spectrum systemic triazole fungicide.
How does Folicur control yellow rust in wheat?
It penetrates leaf tissues systemically to halt ergosterol synthesis in Puccinia rust mycelium, suppressing active rust pustules.
Does Folicur offer curative control over existing fungal infections?
Yes, Tebuconazole possesses both preventative barrier properties and systemic curative action against established early infections.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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