(Aphis nasturtii)
The Buckthorn aphid or Buckthorn-potato aphid (Aphis nasturtii) 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. Aphis is a genus of insects in the family Aphididae containing at least 600 species of aphids. It includes many notorious agricultural pests, such as the soybean aphid Aphis glycines. Many species of Aphis, such as A. coreopsidis and A. fabae, are myrmecophiles, forming close associations with ants.