Table 4 Concentration (μg g−1) of pyrethroid in tea plantation soil
Location | Wet season | Dry season | ||
|---|---|---|---|---|
Residues (μg g−1) ± SD (n = 3) | Residues (μg g− 1) ± SD (n = 3) | |||
Permethrin | Deltamethrin | Permethrin | Deltamethrin | |
A1 | < LoQ | 0.09 (0.003) | < LoQ | BDL |
A2 | 0.25 (0.020) | 0.11 (0.006) | < LoQ | BDL |
A3 | 0.23 (0.018) | 0.11 (0.018) | 0.18 (0.015) | BDL |
A4 | < LoQ | 0.09 (0.007) | < LoQ | BDL |
A5 | 0.18 (0.018) | 0.09 (0.012) | 0.16 (0.018) | BDL |
A6 | 0.23 (0.030) | 0.10 (0.002) | 0.32 (0.042) | BDL |
A7 | 0.28 (0.028) | 0.10 (0.006) | 0.23 (0.015) | BDL |
A8 | 0.27 (0.031) | 0.10 (0.003) | 0.14 (0.018) | BDL |
A9 | BDL | 0.12 (0.017) | 0.15 (0.015) | BDL |
A10 | 0.21 (0.044) | 0.12 (0.020) | 0.22 (0.023) | BDL |
A11 | 0.36 (0.031) | 0.12 (0.025) | < LoQ | BDL |