Development continues to a larger, third larval stage and then to an oval, shiny black, spiny pupal stage marked with a fringe of white wax around the margin. Adults emerge from a T-shaped crack on the back of the pupa. Development from egg to adult can occurs in 60 to 120 days, depending on temperature. Citrus blackfly adults and immatures feed on the underside of host plant leaves. Photosynthesis and fruit production are reduced because light can not penetrate the blackened fungus layer to the leaf surface.
High numbers flying adults associated with heavily infested host plants can be a nuisance.
For additional information, contact your local Texas extension service agent, or search for other state extension service offices.