| Rearing medium | Treatments and doses | Interval in days | Concentration of lead (µg/g tissue) | Concentration of cadmium (µg/g tissue) | ||
| Control | Treated | Control | Treated | |||
| Sterile river sand | Lead acetate 0.1% (w/v) | 15 | 67.7 ± 3.9 | 247.2 ± 14.3 | - | - |
| 30 | 39.3 ± 2.3 | 150.0 ± 8.7 | - | - | ||
| Cadmium sulphate 0.1% (w/v) | 15 | - | - | 47.14 ± 2.7 | 159.9 ± 9.2 | |
| 30 | - | - | 23.6 ± 1.4 | 124.6 ± 7.2 | ||
| Sandy loam soil | Fly ash 5% (w/w) (50 tons/ha) | 15 | 40.0 ± 2.3 | 192.6 ± 11.1 | 46.7 ± 2.7 | 185.2 ± 10.7 |
| 30 | 38.0 ± 2.2 | 91.2 ± 5.3 | 19.2 ± 1.1 | 71.9 ± 4.2 | ||
| Fly ash 20% (w/w) (200 tons/ha) | 15 | 40.0 ± 2.3 | 106.0 ± 6.1 | 46.7 ± 2.7 | 68.7 ± 4.0 | |
| 30 | 38.0 ± 2.2 | 65.6 ± 3.8 | 19.2 ± 1.1 | 62.0 ± 3.6 | ||