Aphis nasturtii, the buckthorn aphid or buckthorn-potato aphid, is an aphid in the superfamily Aphidoidea in the order Hemiptera. It is a true bug and sucks sap from plants. It is a cosmopolitan species.
It is known to be a major insect pest on sunflower plants, lettuce, potato, beets, and buckthorn. The aphid is also act as a vector to 15 plant viruses.