Sawtoothed Grain Beetle

Sawtoothed Grain Beetle

The Sawtoothed grain beetle gets its name from the six projections contained on each side of thorax (chest). The adults are about one-tenth of an inch in length and are reddish brown to dark brown in color. They are long and narrow with flattened bodies, giving them access to small cracks and crevices. Sawtoothed grain beetles have well developed wings, although they have not been seen flying. The adults tend to run very rapidly over stored food products.

Adult females will lay their eggs one-by-one or in small batches near suitable food sources for the larvae. They are capable of laying between 45 – 285 eggs that will hatch in about 8 days. Their life cycle generally takes about six weeks. However, temperature and humidity affect the development time and the number of instars.