Technical composition and chemical classes
- Azoxystrobin (18.2% w/w): Belongs to the strobilurin class (FRAC Group 11 - Quinone Outside Inhibitors).
- Difenoconazole (11.4% w/w): Belongs to the triazole class (FRAC Group 3 - Demethylation Inhibitors).
- Formulated as a Suspension Concentrate (SC), providing excellent leaf adherence, rainfastness, and uniform spray distribution.
Dual mode of action and synergy
- Azoxystrobin inhibits mitochondrial respiration at Complex III, preventing fungal spore germination and energy (ATP) production.
- Difenoconazole halts ergosterol biosynthesis in fungal cell membranes, stopping fungal hyphal growth and tissue colonization.
- The two chemistries work synergistically to provide robust preventive protection alongside deep systemic curative action.
Target diseases and crop protection spectrum
- Paddy: Outstanding control of sheath blight (Rhizoctonia solani) and blast (Magnaporthe oryzae).
- Chilli: Controls anthracnose (fruit rot / dieback) and powdery mildew.
- Tomato and potato: Protects foliage against early blight (Alternaria solani) and late blight.
- Follow CIBRC approved label recommendations, rotate with multi-site contact protectants, and adhere to prescribed pre-harvest intervals.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the exact technical name of Amistar Top?
Amistar Top contains Azoxystrobin 18.2% + Difenoconazole 11.4% SC.
What are the two fungicide classes present in Amistar Top?
It combines a strobilurin (Azoxystrobin) and a triazole (Difenoconazole).
How does Amistar Top control fungal diseases?
It inhibits mitochondrial respiration and blocks ergosterol cell membrane synthesis in fungal pathogens.
Which major diseases are controlled by Amistar Top in rice?
It controls sheath blight and blast diseases in paddy crops.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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