• Both grub and adults cause the damage.
• Grains are hollowed out; kernels are reduced to mere powder. S. oryzae and S. zeamais starts its attack in field itself.
• Adults cut circular holes. Heating takes place during heavy infestation, which is known as ‘dry heating’

Identification of the pest

• Egg - Translucent white, plugs the egg hole with gelatinous secretion, laid singly on grains.
• Grub - White with yellowish brown head, apodous, fleshy, curved, remains within the grain
• Pupa - Pupates inside the grain.
• Adult - Small, reddish brown to chocolate coloured weevils has characteristic snout, and the elytra have four yellow spot