The fastest useful split
Indianmeal moths leave obvious webbing; drugstore beetles leave pinholes and fine product dust without silk.
Do not rely on a single color match. Start with scale and physical form, then check where the sign accumulates and whether a companion clue supports one candidate over the other.
| Feature | Indianmeal moth | Drugstore beetle |
|---|---|---|
| Residue | Silk/clumped food | Pinholes/fine dust |
| Adult | Two-tone moth | Rounded brown beetle |
| Larva | Visible caterpillar | Curved grub |
| Products | Broad dry foods | Spices/pet food/botanicals |
Look for silk in package seams.
Do not spray pantry shelves or food packages.
Open safety guidanceCheck each full evidence profile
Indianmeal moth
Plodia interpunctella
Silk-clumped food, webbing in package seams and a two-tone adult moth in kitchens or pantries.
Drugstore beetle
Stegobium paniceum
Hump-backed brown adults, small package pinholes and fine product dust without obvious silk.
Why a visual match can fail
Scale can be distorted by a close-up photograph, loose material may be moved by cleaning or airflow, and old evidence can change color or texture. A reliable conclusion uses multiple observations that point in the same direction and preserves contradictory details instead of forcing a match.