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