Bug Identifier
Sawtoothed Grain Beetle
Community identification

Sawtoothed Grain Beetle

Oryzaephilus surinamensis

Order & Family
Order: Coleoptera, Family: Silvanidae
Size
Typically 2.4 - 3 mm (0.09 - 0.12 inches) in length.
See this bug in the Encyclopedia

Natural Habitat

Sawtoothed grain beetles are common pantry pests found in kitchens, pantries, food processing plants, warehouses, and grocery stores. They infest various dried food products and prefer warm, humid environments.

Diet & Feeding

The sawtoothed grain beetle feeds on a wide variety of stored dry foods including grains, cereals, flour, pasta, pet food, nuts, dried fruit, chocolate, and spices. They do not feed on whole, unbroken grains but chew through packaging to access processed products.

Behavior Patterns

Adult sawtoothed grain beetles are active and can often be found crawling around on food surfaces. They are not strong fliers but can fly short distances, especially in warm conditions. Females lay eggs individually in food products, and larvae develop within the food. They are known for rapid reproduction under favorable conditions.

Risks & Benefits

Potential Risks: They are a significant pest of stored food products, capable of causing substantial economic damage due to contamination and spoilage of food items. Infested food becomes unpalatable and must be discarded. They do not bite or sting humans and are not known to transmit diseases. Potential Benefits: None significant to humans; however, like all insects, they play a role in decomposition in natural settings.