Insecticidal compositions have at least one active agent and at least one insecticide. The active agent can include perilla oil, a component found in perilla oil, or a perillaldehyde or carvone analog. The insecticide can include a pyrethrum, pyrethrin, pyrethroid, neonicotinoid, chlofenapyr, ethiprole, sulfoxoflor, carbamate, organophosphate, or organochlorine. Methods for controlling insects include contacting an insect with an effective amount of a composition described in this specification. Modified plants that produce an active agent can be contacted with an insecticide.