Ornate carpet beetle
Trogoderma ornatum (Say)

Classification

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

Description

  • Adults are oval, 1.9 to 3.6 mm long and are dark brown with light brown patterns on the elytra.
  • Larvae are oval shaped and covered in dense hairs with distinct tufts on the last abdominal segment.
  • Larvae change from whitish yellow in color to reddish brown as they mature.

Similar species

  • Other Trogoderma species

Commodities attacked

  • Attacks cereals, beans, barley, cottonseed pellets, broom corn, beet seed, fish meal, canary seed, oats
  • May attack stuffed mammals and birds, insect collections, botanical specimens

Signs of infestation

  • Contamination of product with cast larval skins

Damage

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

How to control

Geographic range

  • In Canada, it occurs only in southern Ontario

Life history

  • Females lay eggs amongst the food source.
  • Larvae are able to undergo diapause (dormancy) if conditions for development are not suitable.

Images

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