Mealworm Beetle Identification
Tenebrio molitor
The Mealworm Beetle is commonly associated with damp grain residues and sweepings.
Quick Identification
- Large dark beetle (12–18 mm)
- Large yellowish larvae (“mealworms”)
- Larvae up to 30 mm
Where We See It
- Mill sweepings
- Damp grain areas
- Dark storage zones
Life Cycle
- 275–460 eggs per female
- Larvae tolerant of cold conditions
Why It Matters
- Feeds on flour, grain, decaying material
- Indicates sanitation and moisture problems
Monitoring & Control
Sanitation and moisture correction are primary controls.
Need Help Identifying This Pest?
FSS stored product entomologists can confirm identification through photo review or laboratory analysis, then recommend a facility-specific plan.