Grubs and adults cause damage and are voracious feeders.
Adults reduce the grain kernels to mere frass.
Grubs eat their way into the grain or feed on the grain dust and are capable of attacking grain externally.
Egg - Eggs are laid on the surface or on the interstices of cereal grains singly or in clusters.
Grub - White, apodous with brown head, free living upto 3rd instar.
Pupa - Grub enters the grain after 3rd instar for pupation.
Adult - Brown to blackish beetle, head is deflexed down wards below prothorax to such an extent that it is almost hidden in a dorsal view. Antenna clubbed with large loose three segments.
