Table 4.
Effects (means of five replicates ± SE) of soil treatments with different rates of the ten tested EOs on the infestation of the root-knot nematode M. incognita and the growth of tomato (cv. Roma).
| Dose (μg kg−1 Soil) |
Nematode Infestation Parameters | Plant Fresh Weight | ||
|---|---|---|---|---|
| J2 and Eggs g−1 Roots | Gall Index (0–5) |
Aerial Parts | Roots | |
| C. camphora | ||||
| 50 | 23376 ± 379 | 4.2 ± 0.2 | 37.2 ± 0.2 | 9.4 ± 0.2 |
| 100 | 20579 ± 264 | 4.0 ± 0.0 | 40.2 ± 0.4 | 10.6 ± 0.2 |
| 200 | 12053 ± 179 | 2.8 ± 0.2 | 42.2 ± 0.4 | 11.0 ± 0.3 |
| C. verum | ||||
| 50 | 12297 ± 259 | 2.4 ± 0.2 | 61.0 ± 0.5 | 10.4 ± 0.2 |
| 100 | 11945 ± 125 | 2.2 ± 0.2 | 70.6 ± 1.2 | 11.8 ± 0.2 |
| 200 | 9244 ± 198 | 2.0 ± 0.0 | 77.8 ± 2.3 | 14.2 ± 0.8 |
| C. aurantium | ||||
| 50 | 21492 ± 244 | 5.0 ± 0.0 | 34.4 ± 0.2 | 8.8 ± 0.2 |
| 100 | 18685 ± 212 | 4.6 ± 0.2 | 37.4 ± 0.2 | 9.2 ± 0.2 |
| 200 | 16246 ± 244 | 3.8 ± 0.2 | 38.2 ± 0.5 | 9.4 ± 0.2 |
| E. citriodora | ||||
| 50 | 15302 ± 168 | 4.0 ± 0.0 | 60.6 ± 1.4 | 13.0 ± 0.8 |
| 100 | 11222 ± 157 | 3.0 ± 0.0 | 72.8 ± 1.6 | 14.8 ± 0.7 |
| 200 | 9551 ± 209 | 2.2 ± 0.2 | 86.4 ± 3.1 | 18.4 ± 0.5 |
| E. globulus | ||||
| 50 | 22321 ± 212 | 4.0 ± 0.0 | 40.2 ± 0.5 | 9.6 ± 0.2 |
| 100 | 16963 ± 219 | 3.2 ± 0.2 | 41.6 ± 0.5 | 10.6 ± 0.2 |
| 200 | 14938 ± 266 | 3.0 ± 0.0 | 42.2 ± 0.6 | 12.4 ± 0.2 |
| M. piperita | ||||
| 50 | 20830 ± 484 | 3.8 ± 0.2 | 39.4 ± 0.4 | 9.8 ± 0.5 |
| 100 | 18137 ± 433 | 3.2 ± 0.2 | 40.4 ± 0.4 | 11.4 ± 0.2 |
| 200 | 14183 ± 335 | 2.4 ± 0.2 | 43.4 ± 0.2 | 12.6 ± 0.4 |
| P. asperum | ||||
| 50 | 20197 ± 268 | 3.8 ± 0.2 | 60.2 ± 1.8 | 11.4 ± 0.2 |
| 100 | 15182 ± 307 | 2.6 ± 0.2 | 54.6 ± 0.9 | 10.8 ± 0.9 |
| 200 | 11738 ± 273 | 2.0 ± 0.0 | 47.4 ± 0.9 | 8.0 ± 0.3 |
| R. graveolens | ||||
| 50 | 17871 ± 367 | 4.2 ± 0.4 | 53.6 ± 2.2 | 10.4 ± 0.7 |
| 100 | 15700 ± 458 | 2.8 ± 0.2 | 59.0 ± 2.9 | 11.6 ± 0.2 |
| 200 | 10126 ± 255 | 1.8 ± 0.2 | 67.4 ± 1.2 | 13.8 ± 0.2 |
| S. molle | ||||
| 50 | 20368 ± 213 | 4.2 ± 0.4 | 43.8 ± 0.7 | 10.0 ± 0.3 |
| 100 | 16840 ± 203 | 3.0 ± 0.0 | 46.8 ± 0.8 | 11.0 ± 0.3 |
| 200 | 12419 ± 273 | 2.2 ± 0.2 | 49.8 ± 0.4 | 12.6 ± 0.2 |
| S. aromaticum | ||||
| 50 | 12567 ± 131 | 3.0 ± 0.3 | 49.6 ± 2.2 | 9.6 ± 0.2 |
| 100 | 10633 ± 75 | 2.8 ± 0.4 | 61.4 ± 0.7 | 11.6 ± 0.6 |
| 200 | 9160 ± 94 | 2.2 ± 0.2 | 67.4 ± 1.7 | 13.4 ± 1.0 |
| Oxamyl | 7832 ± 275 | 2.0 ± 0.0 | 61.8 ± 0.9 | 11.6 ± 0.2 |
| Tween20 | 28550 ± 1269 | 4.8 ± 0.2 | 40.8 ± 0.4 | 9.2 ± 0.2 |
| Non treated | 28318 ± 432 | 4.8 ± 0.2 | 41.0 ± 0.3 | 8.4 ± 0.4 |
| Non infested | - | - | 43.6 ± 0.2 | 10.4 ± 0.4 |
| LSD (p = 0.05) | 979 | 0.57 | 3.49 | 1.26 |