Some insects turn out to be surprisingly tolerable “housemates.” For example, many spiders help control pests indoors without causing trouble. However, other insects carry venom or invade food, bedding, or the structure of your home. Phereoeca uterella is a moth species that thrives in tropical climates and feeds on a variety of household materials such as wool and silk. When the weather turns hot, watch out for these creatures—known in Javanese as kamitetep—and learn how to protect your home from them.

“Plaster Bagworms” and “Household Casebearers”

The kamitetep is the source of much naming confusion. This moth belongs to the Tineidae family, scientifically identified as Phereoeca uterella. They’re also called “plaster bagworms” and “household casebearers,” though some experts believe “household casebearers” actually refers to a different species, Phereoeca allutella. Regardless of the name, no one wants to see them “setting up camp” inside their living space.

Kamitetep and Their Protective Cases

Interestingly, the kamitetep is better known in its larval stage than as an adult moth. The larvae live inside gray, flattened cases, which they carry around like a shield while foraging for food. When it’s time to pupate, the larva transforms this case into a cocoon where it remains until emerging as an adult moth, according to EDIS. Some people only notice a problem when they find a case with a developing moth inside—or an empty one, which can be unsettling. These cases often blend into garden surroundings, making early detection difficult.

Life Stages

Kamitetep moths go through four life stages: egg, larva, pupa, and adult, according to Native Pest Management. Females lay clusters of tiny eggs in hidden spots to improve survival rates. Once hatched, larvae begin feeding and constructing their portable cases, molting several times before entering the pupal stage. In the pupal stage, they remain hidden inside their cases until emerging as adults. Adult kamitetep moths measure about 1.3 cm (half an inch) and are covered in gray-brown scales.

Diet

These insects prefer warm, humid climates and are often found in closets, basements, gardens, garages, and attics. They feed on a wide range of organic materials, including dust, feathers, wool, spiderwebs, hair, dead insects, lint, silk, paper, and plant debris. Interestingly, they dislike cotton, according to Free Malaysia Today. This species can chew through household items like clothing, carpets, upholstery, or important documents—making them unwelcome visitors.

Where They Hide

If you suspect kamitetep in your home, check storage areas, especially cardboard boxes, fabric storage like linen closets, and carpets. Look for small, tubular cases attached to walls or ceilings. Occasionally, you may spot worm-like larvae crawling near their cases. Like many other moth species, they are attracted to lights, so areas near light sources deserve special attention.

How to Remove Kamitetep From Your Home

Since they are attracted to natural materials, the first step is a thorough spring cleaning: vacuum carpets, furniture, and areas like closets, attics, and basements—especially corners and damp spots. Next, seal all cracks and gaps with caulk or weatherstripping around doors and windows to prevent entry. Use a dehumidifier to reduce moisture levels, making the environment less hospitable. And if you find cases, remove them immediately.

How to Prevent a Kamitetep Infestation

Moths are drawn to food sources and will move on if nothing is available. Therefore, clean regularly to minimize dust and debris; store food in sealed containers; and promptly dispose of crumbs and waste. Don’t panic if you see signs of kamitetep—they may just be passing through in search of food. Keep monitoring to prevent them from establishing a permanent presence.

If an Infestation Occurs

If cleaning and dehumidifying don’t solve the problem, consider using insecticidal sprays or contacting professional pest control services. Fortunately, they don’t directly harm humans or pets, but they can damage household items and spread quickly. Also, let the pest control team know if your home has a spider problem—spiderwebs are one of their favorite food sources.