
Sawtoothed Grain Beetle
Oryzaephilus surinamensis
- Order & Family
- Order: Coleoptera, Family: Silvanidae
- Size
- Typically 2.5-3 mm (0.10-0.12 inches) in length.
Natural Habitat
Sawtoothed grain beetles are common pantry pests found in kitchens, pantries, food processing plants, warehouses, and grocery stores. They prefer warm, humid environments and are typically found within the stored food products they infest.
Diet & Feeding
They primarily feed on stored dry food products such as grains (flour, cereals, pasta, rice, cornmeal), pet food, birdseed, nuts, dried fruits, chocolate, and tobacco. They cannot feed on whole, undamaged grains.
Behavior Patterns
Sawtoothed grain beetles are known for being very active and will quickly hide when disturbed. They are flightless but can be introduced to new areas via infested products. They can reproduce rapidly under ideal conditions (warm and humid). Females lay eggs loosely in food products, and larvae and adults feed within the same food source. Their presence often indicates a larger infestation.
Risks & Benefits
Risks: Sawtoothed grain beetles are significant pests of stored food products, causing contamination and economic loss. They do not bite, sting, or transmit diseases to humans or animals, but their presence can trigger allergic reactions in sensitive individuals. Benefits: They do not provide direct benefits to humans or the ecosystem.