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Azoxystrobin
(No sales, under development, coming soon)

Identification

Synonyms: methyl (E)-2-{2-[6-(2-cyanophenoxy)pyrimidin-4-yloxy]phenyl}-3-methoxyacrylate (IUPAC); 'Amistar' (global) (Syngenta); 'Heritage' (USA, Japan) (Syngenta); 'Ortiva' (Europe, Africa, Middle East) (Syngenta); mixtures 'Quadris' (+ cymoxanil) (USA, Europe) (Syngenta). Other products 'Abound' (nuts and fruit) (Syngenta); 'Bankit' (bananas) (Syngenta); 'Priori' (vegetables, ornamentals, soya beans, coffee) (Syngenta); 'Landgold Strobilurin 250' (Teliton); 'Quo Vadis' (Herbos); mixtures 'Amistar Opti' (+ chlorothalonil) (Syngenta); 'Amistar Pro' (+ fenpropimorph) (cereals) (Syngenta); 'Amistar Top' (+ difenoconazole) (fruit, vegetables) (Syngenta); 'Amistar Xtra' (+ cyproconazole) (Syngenta); 'Dynasty' (+ fludioxonil + metalaxyl-M) (Syngenta); 'Olympus' (+ chlorothalonil) (cereals) (Syngenta); 'Priori Xtra' (+ cyproconazole) (Syngenta); 'Quilt' (+ propiconazole) (Syngenta); 'Renown' (+ chlorothalonil) (Syngenta); 'Amistar-Prince' (+ fipronil) (rice nursery box) (Nihon Nohyaku, Nissan, Syngenta); 'Seed Shield' (+ difenoconazole + fludioxonil + metalaxyl-M) (Helena). Discontinued products 'Gemstone' * (Syngenta); 'Protégé' * (Bayer CropScience, Gustafson); 'ZX' * (Barclay); mixtures 'Amistar Ter' * (+ hexaconazole) (cereals, peas) (Syngenta); 'Bravo Premium' * (+ propiconazole) (Europe, Africa, Middle East) (Syngenta); 'Cruiser Extreme' * (+ fludioxonil + metalaxyl-M + thiamethoxam) (Syngenta); 'CruiserMaxx Sunflower' * (+ fludioxonil + metalaxyl-M + thiamethoxam) (Syngenta); 'Amistar Admire' * (+ imidacloprid) (Bayer CropScience); 'Melody Star' * (+ iprovalicarb) (Germany, Italy, Portugal) (Bayer CropScience); 'Soygard' * (+ metalaxyl) (Bayer CropScience).
CAS No.: 131860-33-8
Molecular Weight: 403.4
Molecular Formula: C22H17N3O5
Structural Formula: Azoxystrobin
Form: White solid.
M.p.: 116 °C; (tech., 114–116 °C)
B.p.: decomp. 345 °C
V.p.: 1.1 × 10-7 mPa (20 °C)
Kow: logP = 2.5 (20 °C)
Henry: 7.3 × 10-9 Pa m3 mol-1 (calc.)
S.g./density: 1.34 (20 °C)
Solubility: In water 6 mg/l (20 °C). In hexane 0.057, n-octanol 1.4, methanol 20, toluene 55, acetone 86, ethyl acetate 130, acetonitrile 340, dichloromethane 400 (all in g/l, 20 °C).
Stability: DT50 for aqueous photolysis 2 w. Stable to hydrolysis at pH 5–7 and room temperature.

Application

Azoxystrobin is a quinone outside inhibitor, inhibiting mitochondrial respiration by blocking electron transfer between cytochrome b and cytochrome c1, at the ubiquinol oxidising site. Controls pathogenic strains resistant to the 14-demethylase inhibitors, phenylamides, dicarboxamides or benzimidazoles. Mode of action Fungicide with protectant, curative, eradicant, translaminar and systemic properties. Inhibits spore germination and mycelial growth, and also shows antisporulant activity. Used to control the following pathogens, at application rates between 100 to 375 g/ha: Erysiphe graminis, Puccinia spp., Leptosphaeria nodorum, Septoria tritici and Pyrenophora teres on temperate cereals; Pyricularia oryzae and Rhizoctonia solani on rice; Plasmopara viticola and Uncinula necator on vines; Sphaerotheca fuliginea and Pseudoperonospora cubensis on cucurbitaceae; Phytophthora infestans and Alternaria solani on potato and tomato; Mycosphaerella arachidis, Rhizoctonia solani and Sclerotium rolfsii on peanut; Monilinia spp. and Cladosporium carpophilum on peach; Pythium spp. and Rhizoctonia solani on turf; Mycosphaerella spp. on banana; Cladosporium caryigenum on pecan; Elsinoë fawcettii, Colletotrichum spp. and Guignardia citricarpa on citrus; Colletotrichum spp. and Hemileia vastatrix on coffee. Phytotoxicity Good crop safety, except on some varieties of apple (e.g. McIntosh, Cox).

Specification

SC, GR

Standard Packaging

Drum, foil bag

Packaging photos coming soon

Risks and Safety Information

Toxic, Class 6.1

Acute oral LD50 for male and female rats and mice >5000 mg/kg. Skin and eye Acute percutaneous LD50 for rats >2000 mg/kg. Slight eye and skin irritation (rabbits). Not a skin sensitiser (guinea pigs). Birds Acute oral LD50 for mallard ducks and bobwhite quail >2000 mg/kg. Dietary LC50 (5 d) for bobwhite quail and mallard ducks >5200 mg/kg diet. Fish LC50 (96 h) for rainbow trout 0.47, Algae EC50 (120 h) for Selenastrum capricornutum 0.12 mg/l. Bees LD50 for honeybees (oral) >25 μg/bee; (contact) >200 μg/bee.

Warning, Toxic

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