Details

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Here’s a detailed summary of Amistar (500 mL) by Syngenta — what it is, how it works, and how it’s used.

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✅ What it is

• Amistar is a fungicide formulated as a Suspension Concentrate (SC) that contains the active ingredient azoxystrobin (22.94% w/w in the Malaysia label) from the “methoxyacrylate” (strobilurin) group. 

• It is marketed in a 500 mL pack size (among others) for use by growers. 

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🎯 What it does / mode of action

• The product is described as being “systemic, protective and curative”. 

• Azoxystrobin acts by inhibiting fungal respiration in fungal mitochondria (i.e., preventing the fungus from producing energy). 

• Because of systemic and translaminar movement, the fungicide can protect new growth and move through leaf tissue. 

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🌾 What it is used for (crops & diseases)

• The label (Malaysia) lists crops like paddy (rice), oil palm (nursery), vegetables (chilli, chilli pepper, cucumber), fruit trees (mango), and others. 

• It targets a broad spectrum of fungal diseases: e.g., sheath blight in rice (Rhizoctonia solani), blast in rice (Pyricularia oryzae), leaf spots, anthracnose etc. 

• Example: On rice, the application rate: 15 mL per hectare (or as per equipment) when first signs of disease appear. 

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🧪 How to use it (basic guidelines)

• Read and follow the label fully (legal requirement in many jurisdictions). 

• Use recommended dose per hectare or per spray volume as specified in the local label. For example: for oil palm nursery leaf-spot, 5 mL per hectare in 300 mL of spray in 600 litre water volume. 

• Apply when early signs of disease appear (rather than waiting until full outbreak) for best results. 

• Good canopy coverage is important — spray upper and lower surfaces of leaves. 

• Observe harvest intervals (pre-harvest interval, PHI) and re-entry intervals (REI) as specified. For example: for chilli/anthracnose the PHI is 7 days. 

• Do not exceed the maximum number of applications per season as indicated: e.g., for some crops, up to 6 sprays per season for chilli & okra; up to 4 for oil-palm & mango; up to 2 for rice. 

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⚠️ Safety / stewardship / other considerations

• Ensure you use appropriate personal protective equipment (PPE) when applying (gloves, long sleeves, etc).

• Because azoxystrobin is a single-mode fungicide (FRAC Group 11), there is risk of resistance build-up; good fungicide rotation and integrated disease management practices are advisable. 

• Storage: Keep in a cool, dry, well-ventilated place; keep out of reach of children; avoid contamination of water bodies and application when drift risk is high.

• Note that the product is not exactly the same as the “Top” version (e.g., the dual-ingredient version AmistarTop which combines azoxystrobin + difenoconazole). The standard Amistar here is single ingredient (just azoxystrobin) version.