- Adult: small, delicate, pear-shaped insects with a posterior pair of tubes (cornicles), used for excreting a defensive fluid, projecting upward and backward from dorsal surface of abdomen; winged and non-winged forms are all female and give birth to living young (nymphs).
- Nymph: similar in appearance to adult but smaller and wingless or with small wing buds; molts to adult in 7-10 days.
- Damage: plant debilitation, sooty mold build-up, leaf distortion, virus transmission.
Winged aphid adults-
winged aphids may invade fields and sometimes carry plant virus (courtesy of E. Vasquez).