Lesser Grain Borer Identification

The Lesser Grain Borer is one of the most destructive stored grain pests in commercial grain handling and food processing environments.

Quick Identification

• Dark reddish-brown
• ~3 mm long
• Clubbed antennae
• Strong flier

Where We See It

• Grain elevators
• Wheat and rice storage
• Processing plants

Life Cycle

• 200–500 eggs per female
• Optimal development ~93°F
• Internal kernel feeder

Why It Matters

• Both larvae and adults bore into grain
• Causes irregular exit holes
• Rapid destruction of stored grain
• Can create severe heating

Monitoring & Control

Highly resistant populations exist in some regions. Fumigation programs must be properly monitored and executed.