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Indian Pest Control Association

Larder Beetle

larder bettleDermestes lardarius and Dermestes peruvianus are barely distinguishable by their appearance. They are both around 6 to 10 mm long and have virtually the same colouring. Beetles and larvae are primarily blackish brown, and the common larder beetle also has a light rusty brown band across its wing cases. The females of both beetle species each lay up to 200 eggs on food. This means that in favourable conditions five to six generations of beetle can develop each year.

Both beetles and larvae are relatively sensitive to the cold.

An infestation of larder and hide beetles is usually identified by their hairy larval skins which are clearly visible. The larvae often occur in large numbers and destroy hides and leather by eating away at them from the inside, leaving them shabby and full of holes. Woollen textiles can also be infested. Damage can also occur in bales of tobacco, cotton reels, cork and asbestos when the larvae bore into them to pupate.

Preventive measures and controls

  • Larvae on the wall should be wiped off with a cloth or removed using a vacuum cleaner
  • Infested textiles should be brushed out, beaten, washed, cleaned or ironed
  • These pests can be destroyed by very hot or cold temperatures
  • Beetles on windows indoors should simply be moved outdoors
  • Insecticides to be used

The basis rule is:
Regularly air and thoroughly vacuum carpets etc in your home, taking care not to forget poorly accessible places