Crape myrtles are among the most common urban trees in the Southeast U.S., and crapemyrtle aphids (Tinnocallis kahawaluokalani), pictured here, are their primary pest. Crapemyrtle aphids are specialist herbivores that eat plant phloem, and their primary natural enemies include generalist predators, such as lady beetles, Orius insidiosus, and lacewings. (Photo credit: Jim Baker, North Carolina State University, Bugwood.org)