The female deposits a single egg in a hole in each kernel and then seals the opening with a gelatinous plug. The larvae feed on the endosperm and complete their development within the kernel. The pupae develop into adults that chew holes in the side of the kernels as they emerge. The granary weevil adult is about 0.3-0.4 cm long and cannot fly. When disturbed, they fold their legs under their body and appear to be dead.
Weevils develop their life cycle completely inside the grain kernels.
Page up Weevils feed on kernels, leaving only the hulls. This weevil has been found in southwestern Ontario storages and in some prairie elevators in recent years. It is 0.2-0.4 cm long and has four distinct reddish orange spots on the wing covers, which are folded over the abdomen. Adult rice weevils can fly. At optimum temperatures, the life cycle may take four weeks.