Pest Guides

Grain Weevil

Sitophilus granarius


Grain Weevil  | Rentokil Pest Control Zambia
  • Adult – 2–3mm in length. Oval indentations in thorax. Black–brown colour. Cannot fly (fused elytra). Rostrum (snout).
  • Larva – usually hidden within grain where it pupates. Legless. Prefers wheat and rye but will infest other cereals.


  • 30 days at 30°C. Normally 8–16 weeks. Can develop at 11°C.


  • A pest of grain. Newly emerged adults leave a characteristic emergence hole in the grain.