The upper surface of the foliage reddens and distorts above these pits. Adult peppertree psyllids are greenish or tan and somewhat pear-shaped. Many native shrubs planted as ornamentals such as manzanita, sugar bush, and lemonade berry can host native psyllid species. These are hardly ever problems and even if psyllids are abundant, most plants tolerate extensive psyllid feeding. However, several introduced plants support exotic psyllids that can be pests.
Nymphs emerge in the spring and feed on developing buds, flowers, and new leaves.
One psyllid generation requires only a few weeks during warm weather. Psyllids are most abundant in the spring when temperatures warm and host plants produce new growth flushes. High temperatures may reduce populations of some species. The eucalyptus psyllid, although damaging to new foliage grown commercially for cut flower arrangements, likewise should not require management in landscapes. If control is necessary, use an integrated program that incorporates good cultural practices, conservation of natural enemies, and the use of less toxic insecticides such as insecticidal soaps and narrow range oils.