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Flour Mite/Grain Mite

Acarus siro


  • Adult — 0.5 mm long. 4 pairs of legs. White or pale brown. Slow moving.
  • Larva — 6 legged and 0.5 mm long. White in colour. Passes through two, 8 legged nymphal stages.


  • 9–11 days at 23°C and 90% relative humidity.


  • Under adverse conditions, may pass through a long and very resistant stage called a hypopus.

Controlling Insects that attack Food Products