It is most easily confused with the cowpea aphid.
Bean aphid has a dull, mattelike appearance while the cowpea aphid is shiny.
Except for the presence of wings, the winged form of the bean aphid is similar in appearance to the wingless forms. Bean aphid only occasionally builds up on carrots and little is known regarding economic thresholds and damage. No cultural control strategies are presently available for managing bean aphids in carrots. Parasitized aphids become bloated and their bodies turn tan in color. Bean aphid is also attacked by a fungus disease that leaves the aphid body flattened and with the appearance of being glued to the leaf.