Callosobruchus maculatus is a common pest of cowpea. This insect is a type of beetle that feeds on the cowpea seed. It lays its eggs on the seed and the larvae then feed on the seed, causing damage and reducing the quality and quantity of the harvest. Cowpea is a common staple food in many parts of the world, especially in Africa, and is an important source of protein. Controlling the infestation of Callosobruchus maculatus is therefore important in order to protect this valuable crop.