Sawtoothed Grain Beetle

Scientific Name: Oryzaephilus surinamensis

Order & Family: Coleoptera, Silvanidae

Size: 2.4 - 3.0 mm (approximately 1/10 to 1/8 inch)

Sawtoothed Grain Beetle

Natural Habitat

Pantry pest, found in stored food products like grains, cereals, dried fruits, flour, and pet food. Can be found in homes, warehouses, and grocery stores.

Diet & Feeding

Omnivorous, feeding on a wide variety of stored food products including grains, dried fruits, nuts, chocolate, pet food, and spices. They do not feed on whole, undamaged grains but prefer broken kernels and processed foods.

Behavior Patterns

These beetles are highly active and can move quickly. They infest stored dry food products, laying eggs directly on or near the food source. Both larvae and adults feed on the same materials. They are known for their ability to slip into very small cracks and crevices in packaging or storage containers.

Risks & Benefits

Potential risks include contamination and spoilage of stored food products, leading to economic losses and potential health risks if infested food is consumed. They are not known to bite or transmit diseases. There are no notable benefits associated with this pest.

Identified on: 9/17/2025