Aphis craccivora, commonly known as the cowpea aphid, is a small insect belonging to the family Aphididae. It is a pest that primarily feeds on leguminous plants, including cowpeas, soybeans, and lentils. The cowpea aphid has a black or dark brown body with long legs and antennae. It reproduces rapidly and can cause significant damage to crops by sucking sap from the plants and transmitting viral diseases.