What Are Plaster Bagworms?

Plaster bagworms (also called household casebearers) are the larval stage of a small moth. They build and live inside silk cases made of lint, dust, and spider webs for protection.

You’ll often find them:

On stucco, walls, and ceilings
Hanging from window screens or porch enclosures
In shaded, humid spots around the home

While they don’t bite or cause structural damage, they feed on organic materials like lint, hair, and spider webs, and can multiply quickly if left untreated.

How to Get Rid of Plaster Bagworms

Here’s how to control them effectively:

Remove them manually. Vacuum or brush off the cases and dispose of them.
Reduce humidity. Use dehumidifiers indoors and improve airflow in garages or porches.
Keep it clean. Regularly dust and remove spider webs — one of their favorite food sources.
Seal cracks and gaps. This helps prevent moths from laying new eggs.
Professional treatment. A targeted pest control application helps stop active larvae and prevent future infestations.

How Westfall’s Can Help

At Westfall’s Lawn and Pest, we help Bradenton and Manatee County homeowners control plaster bagworms with:

Careful inspection and identification
Low-toxicity treatments around affected areas
Ongoing pest management to prevent them from returning

With regular maintenance, you can keep your home clean, protected, and free of these pesky bagworms year-round.