Which life stage of carpet beetles is responsible for causing damage?

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The larvae of carpet beetles are the life stage responsible for causing damage. This is because the larvae are equipped with voracious appetites and are known to feed on a variety of materials commonly found in households, such as wool, fur, feathers, and even some types of synthetic fibers. They have small, bristly bodies that can easily move through carpets, fabrics, and upholstery, leading to significant destruction as they consume these materials for nourishment.

While eggs and pupae represent earlier and transitional stages in the beetle's lifecycle, they do not actively feed on or damage materials in their environment. The adult beetles, although they are the visible stage that many people might encounter, primarily feed on pollen and do not cause the kind of material damage associated with their larvae. Therefore, the larvae are the only stage that poses a direct threat to household items, making them the primary concern when it comes to infestations.