It has been demonstrated that that application of an entomopathogenic nematode Heterorhabditis bacteriophora can reduce the population of the western corn rootworm Diabrotica virgifera virgifera in the field and thus reducing the damage caused by this insect pest to corn roots and preventing subsequent lodging of plants (Stefan et al., 2010). References:
Stefan, T., Ibolya, H.Z., Ehlers, R.U., Peters, A. and Kuhlmann, U. 2010. The effect of application techniques on field-scale efficacy: can the use of entomopathogenic nematodes reduce damage by western corn rootworm larvae? Agricultural and Forest Entomology. 12: 389-402.