Weevils can be controlled by storing dry grain in air-tight containers. Weevils are a type of beetle that infest stored grains and can cause significant damage to crops. By storing dry grain in air-tight containers, the weevils are denied access to the grain and are unable to lay their eggs. Without the eggs, the weevil population cannot reproduce and the infestation can be controlled. Additionally, proper sanitation and cleaning of storage facilities can help prevent weevil infestations from occurring in the first place.