Mottled dermestid beetle
Trogoderma inclusum LeConte


Secondary pest: Grain feeder and scavenger
Order: Coleoptera
Family: Dermestidae
Acronym: TIN


  • Adults are mottled or bicoloured in appearance.
  • Adults are oval in shape, with clubbed antennae and are 3.5 mm in length.
  • Adults may be distinguished from other Trogoderma species by the presence of a distinct notch in the inner margin of the eyes.
  • Larvae are cream coloured with tufts of hair and spines present, typical of the Trogoderma.
  • Is also called the mottled dermestid.

Similar species

  • Other Trogoderma species
  • Anthrenus species
  • Anthrenocerus species

Commodities affected

  • Processed dry foods and animal feeds
  • Stored grain, wheat, corn sorghum, nuts

Signs of infestation

  • Contamination of commodity with cast larval skins is the most common sign of infestation


  • Are generalist feeders and damage is not distinguishable from other generalist feeders
  • Larvae cause all damage, adults are nectar and pollen feeders

How to control

Geographic range

  • Is found throughout the world in the Northern Hemisphere
  • Is found across Canada

Where found

  • Infests processed dry foods and animal feeds
  • Is a pest in flour mills, dried milk factories, processing plants and storage facilities

Life history

  • Females deposit eggs singly, near the food source, usually in cracks or crevices or among the food source itself.


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