COMPARISON OF THE PERSISTENCE OF ETHALFLURALIN AND TRIFLURALIN IN SASKATCHEWAN FIELD SOILS

Persistence studies with ethalfluralin have not been reported, and the work described in this paper was undertaken to determine the persistence of ethalfluralin under field conditions at two Saskatchewan locations using a small plot technique. Since ethalfluralin is structurally very similar to the commonly used soil incorporated dinitroaniline herbicide trifluralin, the persistence of the latter compound was similarly studied for comparative purposes. Following soil extraction, ethalfluralin and trifluralin residues were determined by gas chromatographic analysis. Study materials, methods and results are reported.