| Preference index |
|
Concentrations (%) | C. ambrosioides | P. bipinnatifidum |
Control | 1.00 | 1.00 |
0.5 | 0.55 | 0.64 |
1.0 | 0.58 | 0.73 |
1.5 | 0.61 | 0.73 |
2.0 | 0.64 | 0.80 |