Days after treatment Residue (mg kg-1)
Single Dose (160 g a.i. ha-1) Double Dose (320 g a.i. ha-1)
Average % Dissipation Average % Dissipation
0(1 h) 0.439 ± 0.011 - 0.903 ± 0.012 -
3 0.304 ± 0.013 30.75 0.635 ± 0.006 29.67
7 0.149 ± 0.008 66.05 0.315 ± 0.023 65.11
15 0.078 ± 0.006 82.23 0.165 ± 0.010 81.72
30 0.037 ± 0.006 91.57 0.088 ± 0.007 90.25
Table 3: Persistence and dissipation of chlorpyriphos residues in soil.