Plaster bagworms, or kamitetep, are destructive household pests commonly found in warm, humid areas like closets, basements, and garages. Part of the same family as clothes moths, they are most damaging in their larval stage, when they build portable cases from silk, lint, and fibers for protection and pupation.
These insects feed on organic materials such as wool, silk, feathers, human and pet hair, paper, and dead insects—posing a threat to clothing, carpets, and documents. They avoid cotton and synthetic fibers but thrive in dark, undisturbed spaces like under beds or behind baseboards.
To prevent and control infestations:
Vacuum regularly, especially in hidden areas.
Reduce humidity with a dehumidifier or ventilation.
Declutter storage spaces and seal cracks.
Store delicate fabrics in sealed containers.
Remove spiderwebs and dead insects.
In severe cases, insecticides or professional pest control may be needed. Though kamitetep don’t bite or spread disease, their feeding can cause significant damage—and may signal a spider issue nearby.