Aphids are major pests of a variety of crops. One-way aphid populations are controlled is by using their natural predators and parasitoids. However, the mere risk of predation induces changes in behavior that influences herbivore success. Prior work has shown odor cues of predator insects influences aphid movement and reproductive capacity. In this study, we tested whether odor cues of a different natural enemy, parasitic wasps, also influences aphid host-plant selection and nymph production.