Fluazifop-P -butyl

Fluazifop-p-Butyl (Fusilade Zeneca, Venture, Winner) 

IUPAC name 2-(4-(5-trifIuoromethyl-2-pyridyloxy) propionic acid Molecular formula C19H20F3NO4 Toxicity class Not classified 

Uses Fluazifop-p-butyl is a selective postemergence phenoxy herbicide. It is used for control of the annual and perennial grass weeds in cotton, soybeans, stone fruits, asparagus, coffee, and others. The formulation is an emulsifiable concentrate. Fluazifop-p-butyl formulations may contain some fluazifop-butyl.1317 

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Chester, G., Loftus, N.J., Woollen, B.H., and Anema, B.P. (1990b) The effectiveness of protective clothing in reducing dermal exposure to, and absorption of, the herbicide fluazifop-P-butyl by mixer-loader-applicators using tractor sprayers, in Book of Abstracts, Seventh International Congress of Pesticide Chemistry, Vol. Ill, Freshe, H. and Kesseler-Smith, E., Eds., Conway, Hamburg. 

Fluazifop-P-butyl [79241-46-6] Salmo gairdnerl LC5o(96-h) 0.73 Flumburg et al., 1989... 

A number of trifluoromethylpyridine-containing agrochemicals have found their way into commercial use. The grass herbicide fluazifop-P-butyl (Fusilade ), which is prepared from 2-chloro-5-trifluoromethylpyridine (Fig. 19), is one such product. 

Graminicide Animals. In mammals, fluazifop-P-butyl is metabolized to fluazifop-P, which is rapidly excreted... 

Plants. In plants, fluazifop-P-butyl is rapidly hydrolyzed to fluazifop-P, which is then partly conjugated. Ether cleavage gives the pyridone and propionic acid metabolites, which may both be further metabolized or conjugated... 

Soil/Environment. c. 5800. In moist soils, rapid degradation of fluazifop-P-butyl occurs, DT50 <24 hr. The major degradation product is fluazifop-P, which is hydrolyzed to 5-trifluoromethylpyrid-2-one, and 2-(4-hydroxyphenoxy)propionic acid, both of which are further degraded ultimately to C02... 

Soil/environment. In laboratory soil (40% MHC, pH 5.3-7 7), DT50 2-9 days (20°C). Field DT50 <4 week. Koc 39-84. For degradation route, see fluazifop-P-butyl... 

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