Sawtoothed Grain Beetle


Sawtoothed Grain Beetle


The sawtoothed grain beetle is a small beetle, about 2.5 to 3 mm long. Its body flat and is brown in colour. The beetle gets its name from six saw-like teeth on each side of the body, behind the head. The larvae are white-yellow in colour and about 2.5 to 3 mm long, with six legs.


This beetle and larvae feeds on grains, flours, cereals, nuts, sugar, dog food, and many other stored products that may be in a kitchen’s cupboards or pantry. The adult beetle’s small, flat body allows it easily to penetrate packaging and hide in cracks and crevices. The adult beetle lays 45 to 285 eggs in the cracks and crevices of the foods in which they are infesting, and eggs hatch within 3 to 17 days. The larvae develop for another 20 to 30 days before becoming an adult beetle.


Sanitation is the best prevention for the sawtoothed grain beetle. Cupboards, pantries, and food storage and handling areas should be kept clean and vacuumed regularly and spills should be removed quickly. Store food products in containers with tight-fitting lids, made of glass, metal or plastic. To kill off any insects in imported dry food products, freeze them in a household freezer for at least a week before transferring the products to the cupboards.


Since these insects live in food and food preparation areas, a pest professional will assist you in determining which treatments will be effective and safe to control this pest.