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Sitophilus granarius

Appearance

  • Adult – 1/16"–1/8" 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.

Lifecycle

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

Habits

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

Controlling Insects that attack Food Products