Dual active synergy and physiological plant health
Amistar Top pairs two complementary chemistries that provide broad disease control while enhancing crop physiology.
- Azoxystrobin (FRAC Group 11): Inhibits spore germination and fungal respiration at the mitochondrial cytochrome bc1 complex.
- Difenoconazole (FRAC Group 3): Inhibits sterol demethylation (DMI), blocking mycelial growth and arresting fungal development within plant tissue.
- Systemic and translaminar translocation: Distributes uniformly across foliage and newly emerging plant flushes.
- Greening effect: Improves nitrate reductase activity, retards chlorophyll degradation, and optimizes grain and fruit filling.
Target crops and registered disease spectrum
Amistar Top is registered under CIBRC guidelines for multiple high-value cereal, vegetable, and fruit crops.
- Rice (Paddy): Highly effective against sheath blight (Rhizoctonia solani) and blast (Magnaporthe oryzae).
- Chilli: Control of anthracnose fruit rot (dieback) and powdery mildew.
- Wheat: Prevention of yellow rust (stripe rust) and leaf rust during grain formation.
- Tomato and Maize: Suppression of early blight, Maydis leaf blight, and target spot.
Application guidelines and resistance stewardship
Apply Amistar Top at the early onset of disease symptoms or as a preventive application during disease-favourable humid weather. Use calibrated knapsack or power sprayers with hollow cone nozzles to achieve complete canopy misting. To prevent fungicide resistance, do not exceed two consecutive sprays; alternate with multi-site contact or alternative FRAC group fungicides.
Official source
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Central Insecticides Board and Registration Committee ↗Related on KisanPe
Common questions
What are the two active ingredients in Amistar Top?
Amistar Top contains Azoxystrobin 18.2% and Difenoconazole 11.4% in a suspension concentrate (SC) formulation.
How does Amistar Top control rice sheath blight?
Its systemic action penetrates the leaf sheath and stem to stop fungal mycelial spread, dry out lesions, and prevent secondary infection.
What is the greening effect observed after spraying Amistar Top?
Azoxystrobin enhances plant photosynthetic efficiency and delays chlorophyll breakdown, helping leaves stay green longer during seed maturation.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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