he pea aphid Acyrthosiphon pisum is a member of Aphidinae , and the tribe Macrosphini which includes the important aphid agricultural pests Myzus persicae (the peach-potato pahid) and Diuraphis noxia (the Russian wheat aphid).
The pea aphid is distributed world-wide and feed mostly on Fabaceae like Medicago , Trifolium , Pisum or Vicia. Many races of the pea aphid can be found in the wild that differ in their host plant preferences, and some of these races represent incipient speciation events. It can transmit plant viral diseases by non-circulative viruses (e.g. in bean, peas, clover) and circulative viruses (e.g. Pea enation mosaic virus , Bean leaf-roll virus ).