Diuron and Ametryn Runoff from a Plantain Field

Abstract

The runoff losses of Diuron and Ametryn in water and sediment from a plantain field were determined during 1980 and 1981. The highest concentrations of Diuron and Ametryn residues detected in the water samples were 0.45 and 0.25 p/m, respectively. The concentration of both herbicides in water decreased rapidly with time. Diuron residue was no longer detectable in water samples at the end of 16th week, while Ametryn residue took 9 weeks to fall below the detection limit. The highest concentrations of Diuron and Ametryn residue in the sediment were 5.80 and 1.13 p/m. The concentrations of Diuron and Ametryn residue in the sediment at the end of this investigation were 0.20 and 0.14 p/m, respectively. The total quantity of Diuron and Ametryn losses during the course of this experiment was estimated to be 7.7 and 5.6%, respectively, of the total application.