It has a body length of 2.0 to 4.0 mm and in North Carolina, most adults are wingless. Egg - Approximately 0.85 mm long, the light green egg turns a shiny black before hatching.
Eggs are very rare in North Carolina.
Nymph - The immature aphid is smaller than, but similar to, the larger wingless adult. It requires four molts to reach the adult stage. Host Plants - Pea aphids infest garden and field peas, sweet peas, sweet clover, alfalfa, and some leguminous weeds. Vetch and crimson clover are important overwintering hosts. Damage - Pea aphids extract sap from the terminal leaves and stem of the host plant.