Recently, Hiltpold et al. (2011) studied the relationship between synthesis and release of (E)-beta-caryophyllene (E beta C) in maize roots upon feeding by larvae of the Western corn root worm, Diabrotica virgifera virgifera and attraction of the entomopathogenic nematode Heterorhabditis megidis. These researchers reported that nematodes were attracted to the maize roots that were injured by D. virgifera virgifera. Read following papers for more information.
Ali, J.G., Alborn, H.T. and Stelinski, L.L. 2011. Constitutive and induced subterranean plant volatiles attract both entomopathogenic and plant parasitic nematodes. Journal of Ecology 99: 26-35.
Hiltpold, I., Erb, M., Robert, C.A.M. and Turlings, T.C.J. 2011. Systemic root signalling in a belowground, volatile-mediated tritrophic interaction. Plant cell and Environment 34: 1267-1275.
Hiltpold, I., Baroni, M., Toepfer, S., Kuhlmann, U. and Turlings, T.C.J. 2010. Selection of entomopathogenic nematodes for enhanced responsiveness to a volatile root signal helps to control a major root pest. Journal of Experimental Biology 213: 2417-2423.
Hiltpold, I., Toepfer, S., Kuhlmann, U. and Turlings, T.C.J. 2010. How maize root volatiles affect the efficacy of entomopathogenic nematodes in controlling the western corn rootworm? Chemoecology. 20: 155-162.