Sawtoothed Grain Beetle





  Classification  

Order:   Coleoptera

  Development  

Holometabola

  Ecological role  

Scavenger or omnivore

Economic
  importance  

A common pest throughout most of the world, it is found in grocery stores, food warehouses, grain storage and homes.   Both larval and adult stages feed on all food of plant origin, especially grain and grain products like flours, meals, breakfast foods, stock and poultry feeds, coconut, nutmeats, candies, and dried fruit; it is not uncommon to find these beetles infesting pet food, bird seed, and rodent bait.

Distinguishing
  characteristics  

The adult is a small, active, brown beetle, 1/10 to 1/8 inch long, with a flattened body and six saw-toothed projections on each side of the thorax.   The abdomen tapers toward the tip.   Its body is well adapted for the cracks and crevices where it is often found.   Adults do not fly and live about 6 to 10 months, with some living up to three years.   The larva is yellowish-white with a brown head and, when fully grown, is usually less than 1/8 inch long.




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Last Updated:   27 August 2003
John R. Meyer
Department of Entomology
NC State University