Fig. 9. Concentrations of (A) bromide, (B) bentazon, and (C) imidacloprid in ground water collected from different filter depths as a function of time as measured at the experimental field. Time zero is 0000 h on 7 Apr. 1998 (i.e., the application date of bromide and bentazon; imidacloprid was applied on Day 50). Points are the averages and bars are the standard errors in (A) and (B). In (C) the points are individual values and the dashed line indicates the detection limit (points on this line indicate values below the detection limit).