Rusty & Flat Grain Beetle Identification

Flat grain beetles are common secondary feeders in grain elevators and flour mills.

Quick Identification

• Small, flat, reddish-brown
• ~2 mm long
• Long slender antennae
• Strong fliers

Where We See It

• Grain elevators
• Flour mills
• Ingredient bins
• Dust accumulation areas

Life Cycle

• Egg to adult: ~22–35 days in warm conditions
• High reproductive potential
• Cannibalistic behavior common

Why It Matters

• Feed on damaged kernels and grain dust
• Often indicate pre-existing grain damage
• Rapid population growth in warm grain

Monitoring & Control

Improved sanitation and dust management are key. Severe infestations may require fumigation.