Amistar Fungicide: Azoxystrobin 23% SC, Disease Control and Dose

Chemical active ingredient and strobilurin action

• Strobilurin class: Active ingredient Azoxystrobin belongs to FRAC Group 11 (QoI - Quinone outside Inhibitors).
• Mitochondrial respiratory block: Blocks electron transfer at Complex III in fungal mitochondria, depriving fungal spores of ATP energy and preventing germination.
• Systemic and translaminar mobility: Moves acropetally through the xylem stream to protect expanding shoots, while diffusing across leaf blades to shield untreated lower surfaces.
• Formulation: High-stability Suspension Concentrate (23% SC) with rapid rain-fastness within 2 hours of drying.

CIBRC approved crops and target fungal diseases

Approved in Indian agriculture for controlling Downy mildew and Powdery mildew in grapes; Anthracnose and Powdery mildew in mango and chilli; Late blight in tomato and potato; and Blister blight in tea plantations. Applying preventively before visible sporulation maintains clean foliage and prevents fruit infection.

Application timing, dosage and anti-resistance strategy

• Dilute according to CIBRC approved label recommendations (typically 200 ml per acre in 200 liters of water for field crops).
• Apply at pre-flowering or early disease onset using a fine hollow cone nozzle for comprehensive canopy coverage.
• Never exceed two consecutive applications of Amistar; rotate with multi-site contact protectants like Mancozeb or Copper Oxychloride to prevent pathogen resistance.
• Observe the mandatory Pre-Harvest Interval (PHI) specified on the container before harvesting produce.

Related on KisanPe

• Crop protection guide →
• Pesticide calculator →
• Krishi Vigyan Kendra →
• Ask Sakhi AI →
• Amistar Top price and fungicide guide for farmers →

Common questions

General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.