Herbivore-induced plant volatiles (HIPVs) are regarded as an indirect defense against herbivores, since they attract natural enemies to infested plants. On the other hand, HIPVs also affect behavioral responses of herbivores. In a previous study, Lytopylus rufipes, parasitoid oriental fruit moth (Grapholita molesta), showed positive pear HIPVs, but influence on G. molesta is still unclear. To b...