Dual mode of action and biochemical properties
- Azoxystrobin (FRAC group 11): Inhibits mitochondrial respiration at the quinone outside site (QoI), stopping fungal spore germination and energy production.
- Difenoconazole (FRAC group 3): Systemic demethylation inhibitor (DMI) that halts fungal cell wall ergosterol synthesis, stopping fungal hyphal growth inside plant tissue.
- Translaminar movement: Moves through leaf tissue to protect both the upper and lower leaf surfaces from fungal infection.
Target diseases and crop spectrum
- Rice (paddy): Sheath blight (Rhizoctonia solani) and blast (Magnaporthe oryzae) management.
- Chilli and tomato: Anthracrose fruit rot, powdery mildew, early blight, and leaf spot diseases.
- Maize and onion: Leaf blights and purple blotch.
- Delivers a noticeable physiological greening effect that enhances photosynthetic efficiency and grain quality.
Resistance management and field application
Apply preventively or at the earliest onset of disease symptoms. To prevent fungal resistance development, limit applications to the maximum recommended rounds per season and rotate with multi-site contact fungicides like Mancozeb or Chlorothalonil. Always comply with official label dilution rates and pre-harvest intervals.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board & Registration Committee (CIB&RC) ↗Related on KisanPe
Common questions
What active ingredients make up Amistar Top fungicide?
Amistar Top contains Azoxystrobin 18.2% and Difenoconazole 11.4% formulated as a suspension concentrate (SC).
Does Amistar Top have curative or preventive action?
It offers both preventive action (stopping spore germination) and curative action (eradicating established mycelium within plant tissues).
How does Amistar Top help in rice cultivation?
It effectively controls sheath blight and blast while promoting greener, healthier foliage and cleaner grain filling.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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