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The braconid, Dolichogenidea tasmanica (Cameron) (Hymenoptera: Braconidae), is the most abundant parasitoid attacking the light brown apple moth (LBAM) Epiphyas postvittana (Walker) (Lepidoptera: Tortricidae), which represents the major insect pest of grapevines in Australia and New Zealand. Enhancing populations of alternative hosts for the parasitoid is one way to promote conservation biological control of this insect pest. The host foraging behavior of this parasitoid in response to E. postvittana and two related alternative hosts, Acropolitis rudisana (Walker) and Merophyas divulsana (Walker), was investigated in the laboratory to evaluate the viability of this approach. All hosts were accepted by the wasp with above 70% parasitism rate. During behavioral assays, the parasitoid responded differently to the host species, possibly due to differences in their physical characteristics, and their feeding and defensive behaviors. The results of the experiments indicate that populations of D. tasmanica should be enhanced by the presence of the alternative hosts, A. rudisana and M. divulsana. Conservation of D. tasmanica in agricultural landscapes is crucial for the conservation biological control of LBAM.