Carpet Beetles (Anthrenus verbasci)
Appearance
Carpet beetles resemble ladybird beetles in shape, but are usually less than 1/4″ long. They may display a rainbow of colour on their back surfaces. It can take 250 days to three years for varied carpet beetles to grow from an egg to an adult.
Habits
Carpet beetles are found in homes in attics, Oriental carpets, tapestries and wood-based wall-to-wall carpeting. They also feed on dead insects, furs, hides, feathers, horns, hair, silk and bones. We often get calls in Dublin for light but persistent infestations caused by cat or dog hair.
Threats
Carpet beetles do not bite and do not spread disease. Their primary threat is damage to natural fibre materials — wool carpets, silk, cashmere, leather, furs, feathers, and dried animal products. The larvae (known as woolly bears) cause the damage, not the adults.
A secondary health concern is the dense barbed hairs on carpet beetle larvae, which can cause skin rashes, eye irritation, and allergic reactions in sensitive individuals. This is sometimes mistaken for insect bites. If you are experiencing unexplained skin irritation alongside damage to carpets or clothing, carpet beetle larvae should be investigated as a possible cause.
Signs of a Carpet Beetle Infestation
- Shed larval skins — small, brown, bristly husks found along skirting boards, under furniture, or in carpet edges. These are the most reliable sign of active larvae.
- Irregular bald patches in wool carpets or rugs, particularly along edges and under furniture where larvae feed undisturbed
- Holes in natural fibre clothing — wool, silk, cashmere, or cotton items stored in wardrobes
- Adult beetles (small, oval, mottled pattern) found on window ledges in spring and early summer — adults are attracted to light and are often the first sign of an infestation
- Skin irritation — unexplained rashes or itching, sometimes mistaken for insect bites, caused by contact with larval hairs
Prevention
- Store wool and silk clothing in plastic containers.
- Dry-clean clothing thoroughly before storing for long periods of time.
- Hoover wool carpets regularly.
ASK AN INSECT CONTROL SPECIALIST
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Contact Owl Pest Control
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Unit 19, Tallaght Business Centre, Whitestown Road, Tallaght, Dublin 24. D24 TD42
