Crape myrtle aphids overwinter in the egg stage. The eggs hatch in April, and for the rest of the growing season crape myrtle aphids give birth to living young. The young aphids mature in about 10 days. There are several generations per year. Both winged and wingless aphids are born during the growing season.
Winged forms migrate to start new colonies only on crape myrtles.
The last generation of females lay the overwintering eggs. Sometimes these parasites and predators are not able to keep crape myrtle aphids under control, so chemical control may be needed. The following sprays may be used to control aphids. Repeat application when needed as aphids reappear. Use only with plants listed on label.