Abstract: Plant volatiles play an important role in host habitat location by insect parasitoid. Some parasitoids exhibit innate responses to plant volatiles emanated by healthy plants. Indirect defense was induced in plants when attacked by herbivores through releasing herbivore-induced volatiles to attract specific natural enemies. In addition, pest oviposition-induced plant cues can arrest parasitoid wasps during host location. In recent years, many reports have been published on herbivore-induced plant volatiles, but few focused on the effects of oviposition-induced-volatiles on plant and natural enemies. In this paper, effects of plant volatiles on host location of parasitoids were summarized, which may provide a reference for further study of integrated pest management.