Interactions between herbivores and plants can be modified by the presence of other species in the environment. Plant pathogens, such as viruses, have the ability to induce changes a host plant and consequently impact other species feeding on the same resource. We examined the interaction between soybean aphid (Aphis glycines), an alien species in N. America, its host plant soybean (Glycine max), and two plant viruses, alfalfa mosaic virus (AMV) and bean pod mottle virus (BPMV) which are becoming common in soybean agroecosystems. In laboratory feeding assays, soybean aphid performed worse on plants infected with viruses than control plants. Aphid population growth rates were lowest on plants infected with AMV intermediate on BPMV and highest on control plants. This finding suggests that plant responses to pathogens are not all equivalent and that different viruses could be impacting plants in different ways. In contrast, aphid preference in laboratory assays was no different between virus-infected and control plants. This is despite the fact that virus-infected plants have detectably different volatile profiles than uninfected plants. In summary, plant viruses can negatively influence an herbivore sharing the same host plant via its induction of host plant responses.