Abstract
Chlorfenvinphos (diethyl 1-(2,4-dichlorophenyl)-2-chlorovinyl phosphate) applied broadcast to field plots at 5.6 kg/ha a.i. (56 kg/ha Birlane 10G) 4 days prior to seeding resulted in traces of the parent compound in beets (Beta vulgaris L.), potatoes (Solanum tuberosum L.), carrots (Daucus carota var. sativa DC.), parsnips (Pastinaca sativa L.), and rutabagas (Brassica napobrassica Mill.) at harvest. The α isomer was found in all crops except beets at ~ 0.01 ppm. The β isomer was found in all crops with carrots and parsnips containing 0.09 and 0.06 ppm, respectively. Chlorfenvinphos residue concentrations in treated soil declined ~ 73% during the 23-wk growing season following pesticide application, but trace residues were detected in the soil 4 yr after application.
Publisher
Canadian Science Publishing