Fate of trifluralin in soils and plants

The relative persistence of trifluralin (545 EC and 5 G) and ethalfluralin in prairie soils

“…After 14 wk a significant difference in persistence between herbicides was only observed at the Saskatoon site ( Hayden and Smith (1980) who noted that carry-over of ethalfluralin residues to the next crop year was similar to that of trifluralin. Edaphic and climatic conditions were not the same at all the sites within this study or between this study and that of Hayden and Smith (1980 (Probst et al 1967;Golab et al 1979: Smith 1980. Soil organic mafter levels did not appear to affect the relative persistence of the two trifluralin formulations.…”

Ozonation of trifluralin particles: An experimental investigation with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer

“…The oxidation of the N-propyl group has been observed in the ozone treatment of trifluralin-contaminated soil [20] and the natural degradation of trifluralin in soil and plants [18,19]. The formations of 2,6-dinitro-N-propyl-N-propanoyl-4-(trifluoromethyl) benzamine and 2,6-dinitro-N-(propan-2(and 3)-ol)-N-propyl-4-(trifluoromethyl) benzamine indicate that the ozonation of trifluralin is initiated by the attack of ozone on the propyl group of trifluralin.…”

“…The early studies mainly focused on the environmental fate of trifluralin under various physical and biological conditions [15][16][17][18][19]. These research results showed that the two N-propyl groups of * Corresponding author.…”

“…trifluralin are relatively reactive and the oxidation of the propyl groups resulted in the formation of the hydroxyl and carbonyl groups [18,19]. Recently, the degradation of trifluralin by Fe(II) in solution and the reaction of trifluralin with ozone in the trifluralincontaminated soil and the OH radical in the gas phase have been reported [8,20,21].…”

Metribuzin and trifluralin residues in faba bean following preplant incorporated application

“…Over the next 50 d, trifluralin residues decreased such that chromatograms of the 90-d sample extracts from the Portage la Prairie and Indian Head sites were not significantly different from those for the corresponding check samples. The decrease in residues during this 50-d interval would have been due, in part, to growth dilution and possibly plant metabolism (Probst et al 1967;Biswas and Hamilton 1969). No trifluralin residues were detected in the mature seed from any of the three sites.…”