Black flour beetle
Tribolium madens (Charpentier)


Secondary pest: Grain feeder
Order: Coleoptera
Family: Tenebrionidae
Acronym: TMAD


  • Adults are fairly large for flour beetles, 3.9 to 5.1 mm long.
  • Eyes are relatively large and oval (the American black flour beetle’s eye is round).
  • Larvae are cylindrical and dark brown in colour.

Similar species

Signs of infestation

  • Disagreeable odour in the commodity is an early indication


  • Damage is not distinctive

How to control

Geographic range

  • Is predominantly found in Europe
  • In Canada, has been found in Manitoba, Ontario, Quebec, New Brunswick and Nova Scotia

Where found

  • Has been reported from infested railcars of loose and bagged flour
  • Has also been found in flour mills and warehouses

Commodities affected

  • Flour, meal, seeds, grain and processed cereals

Life history

  • Adults can be long lived, living up to three years.
  • Adult females lay up to 1000 eggs loosely among the food source.
  • Black flour beetle is moderately adapted to a temperate climate.


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