| Oil Conc. | Percentage | M. piperta | C. citratus | O. magoranum | T. vulgaris |
| 5 μl/20 ml | 0.025% | 69% | 56.27% | 52.3% | 48.32% |
| 10 μl/20 ml | 0.05% | 78.5% | 67.6% | 64.82% | 63.32% |
| 15 μl/20 ml | 0.075% | 90.06% | 75.75% | 72.4% | 71.2% |
| 20 μl/20 ml | 0.1% | TI | 78.7 | 75.55% | 74.56% |
| 40 μl/20 ml | 0.2% | TI | TI | TI | TI |