Table 4.
Behavior of Meloydogyne incognita towards volatile organic compounds (VOCs).
| Compounds | Contact nematicidal activity | Fumigant activity against M. incognita | M. incognita chemotactic response |
|---|---|---|---|
| Acetone | − | − | attractant |
| 2-Heptanone | − | − | variable |
| 2-Nonanone | + | − | variable |
| 2-Nonanol | + | + | variable |
| 2-Decanone | + | + | variable |
| 2-Decanol | + | + | attractant |
| 2-Undecanone | + | + | repellent |
| 2-Undecanol | + | + | variable |
| 4-Acetylbenzoic acid | + | − | ALRH |
| Furfural acetone | + | + | attractant |
+, has activity against M. incognita; −, no activity against M. incognita; ALRH, act as an attractant at low concentration and as a repellent at high concentration; variable, C.I. of the VOCs at all 5 concentrations are not significantly different compared with the chemotaxis index (C.I.) of control group.