Sitophilus granarius, commonly known as the granary weevil, is a small beetle that primarily infests stored grains, particularly wheat and barley. Adult weevils are about 2.5 to 5 millimeters long, with a distinctive elongated snout. They are brown to black in color and have a hard outer shell. The life cycle of Sitophilus granarius includes egg, larval, pupal, and adult stages. Females lay eggs inside grains, where larvae develop and feed on the grain. This feeding can lead to significant damage and loss in stored grain supplies, making them a concern for farmers and grain storage facilities.