Red Flour Beetle Identification

The Red Flour Beetle is one of the most common stored product insects in flour mills, bakeries, pet food plants, and commercial food processing facilities. It thrives in processed grain products and fine residues.

Quick Identification

• Reddish-brown beetle
• ~4 mm long
• 3 distinct clubbed segments at end of antenna
• Adults can fly

Where We See It

• Flour mills
• Ingredient transfer systems
• Dust accumulation areas
• Rework and packaging zones

Life Cycle

• 200–450 eggs per female
• Establishes above ~68°F
• Optimal development: ~97°F at 70% RH
• Extremely high population growth potential

Why It Matters

• Feeds on flour, grain dust, cereal products, spices
• Can produce a pungent odor in heavily infested product
• Causes product heating and moisture increases
• One of the fastest-growing stored product insect populations

Monitoring & Control

Sanitation and dust removal are critical. Because they hide in cracks and equipment voids, fumigation may be required for a full reset in severe infestations.