| Plants | Location | Mean | |
| Urban area | Rural area | ||
| Eucalyptus leaves | 25.78 ± 0.37 | 19.49 ± 0.46 | 22.64 |
| Olea leaves | 45.52 ± 0.25 | 12.97 ± 0.24 | 29.16 |
| Zizphus leaves | 10.57 ± 0.39 | 8.67 ± 0.35 | 9.62 |
| Conocarpus leaves | 24.45 ± 0.34 | 14.41 ± 0.53 | 19.43 |
| Mean | 26.58 | 13.84 |
|