FENOXAPROP-P-ETHYL

Details:

APPLICATIONS
fenoxaprop-P-ethyl
Biochemistry Fatty acid synthesis inhibition in grasses, by inhibition of acetyl CoA carboxylase (ACCase).  Mode of action Fenoxaprop-P-ethyl is a selective herbicide with contact and systemic action, absorbed principally by the leaves, with translocation both acropetally and basipetally to the roots or rhizomes.  Uses Post-emergence control of annual and perennial grass weeds in potatoes, beans, soya beans, beets, vegetables, peanuts, flax, oilseed rape, and cotton; and (when applied with the herbicide safener mefenpyr-diethyl) annual and perennial grass weeds and wild oats in wheat, rye, triticale and, depending on ratio, in some varieties of barley. Phytotoxicity Non-phytotoxic to broad-leaved crops.  Formulation types EC; EW; SE.  Selected products: 'Furore Super' (Bayer CropScience); 'Masaldo' (Crop Health); 'Puma' (Bayer CropScience); 'Whip Super' (Bayer CropScience); mixtures: 'Puma Super' (+ mefenpyr-diethyl) (Bayer CropScience)

OTHER PRODUCTS
fenoxaprop-P-ethyl
'Acclaim Super' (Bayer CropScience); 'Bugle' (Bayer CropScience); 'Depon Super' (Bayer CropScience); 'Option II' (Bayer CropScience); 'Ricestar' (with safener) (Bayer CropScience); 'Silverado' (Bayer CropScience); 'Triumph' (Bayer CropScience); 'Whip 360' (Bayer CropScience) mixtures: 'Baghera' (+ mefenpyr-diethyl+ diclofop-methyl) (Bayer CropScience); 'Cheetah Super' (+ mefenpyr-diethyl) (Bayer CropScience); 'Cheyenne' (+ MCPA-2-ethylhexyl) (Bayer CropScience); 'Corniche' (+ diclofop-methyl) (Bayer CropScience); 'Dakota' (+ MCPA-2-ethylhexyl) (Bayer CropScience); 'Djinn' (+ isoproturon+ mefenpyr-diethyl) (Bayer CropScience); 'Dopler' (+ mefenpyr-diethyl+ diclofop-methyl) (Bayer CropScience); 'Fusion' (+ fluazifop-P-butyl) (Syngenta, Bayer CropScience); 'Horizon 2000' (+ fluazifop-P-butyl) (Bayer CropScience); 'Preclaim' (+ pendimethalin) (Bayer CropScience); 'Proper energy' (+ mefenpyr-diethyl) (Bayer CropScience); 'Puma Extra' (+ isoproturon) (Bayer CropScience); 'Puma S' (+ mefenpyr-diethyl) (Bayer CropScience); 'Puma X' (+ isoproturon) (Bayer CropScience); 'Tigress Ultra' (+ diclofop-methyl) (Bayer CropScience); 'Tiller' (+ MCPA-2-ethylhexyl+ 2,4-D-2-ethylhexyl) (Bayer CropScience); 'Twister' (+ fluazifop-P-butyl+ fomesafen-sodium) (Syngenta); 'Zeus' (+ mefenpyr-diethyl+ diclofop-methyl) (Bayer CropScience) Discontinued products mixtures: 'Tigress' * (+ diclofop-methyl) (AgrEvo); 'Tiller' * (+ MCPA-2-ethylhexyl+ 2,4-D-isoctyl) (AgrEvo)

ANALYSIS
Details on hplc method are available from Bayer CropScience. 

MAMMALIAN TOXICOLOGY
fenoxaprop-P-ethyl
Oral Acute oral LD50 for rats 3150-4000, mice >5000 mg/kg.  Skin and eye Acute percutaneous LD50 for rats >2000 mg/kg.  Inhalation LC50 (4 h) for rats >1.224 mg/l air.  NOEL (90 d) for rats 0.75 mg/kg b.w. daily (10 ppm), mice 1.4 mg/kg b.w. daily (10 ppm), dogs 15.9 mg/kg b.w. daily (400 ppm). 

ECOTOXICOLOGY
fenoxaprop-P-ethyl
Birds Acute oral LD50 for bobwhite quail >2000 mg/kg.  Fish LC50 (96 h) for bluegill sunfish 0.58, rainbow trout 0.46 mg/l.  Daphnia LC50 (48 h) 0.56 (pH 8.0-8.4), 2.7 (pH 7.7-7.8) (both mg/l).  Algae LC50 (72 h) for Scenedesmus subspicatus 0.51 mg/l.  Bees LC50 (contact) >300 mg/bee; (feed) >1000 mg/bee.  Worms LC50 (14 d) for Eisenia foetida >1000 mg/kg soil. 

ENVIRONMENTAL FATE
Plants In plants, fenoxaprop-ethyl is metabolised via fenoxaprop to 6-chloro-2,3-dihydrobenzoxazol-2-one.  Soil/Environment In soil, fenoxaprop-ethyl is rapidly hydrolysed to fenoxaprop (A. E. Smith, J. Agric. Food Chem., 1985, 33, 483); DT50 1-10 d.