Centipede Control

Centipedes are predatory arthropods recognized by their elongated, flattened bodies and many pairs of legs — one pair per body segment, distinguishing them from millipedes (which have two pairs per segment). The species most commonly found inside Metro Atlanta homes is the house centipede, with its distinctive long legs and rapid scurrying movement that startles homeowners encountering it on bathroom floors and basement walls at night.

Centipedes are beneficial in the sense that they prey on other insects: cockroaches, silverfish, ants, spiders, bed bugs, and earwigs. Their presence inside a structure, however, is a clear indicator of two problems — excessive moisture and an existing pest population for them to hunt. Eliminating the centipedes without addressing the underlying conditions almost guarantees they return. Servitix service combines centipede treatment with the inspection and prey-pest control needed to keep them from returning.

House centipedes have flattened bodies 1 to 1.5 inches in length and 15 pairs of remarkably long, slender legs that give them a leg span of up to 4 inches. The body is yellowish-gray to brown with three dark longitudinal stripes running down the back, and the legs are banded with light and dark sections. The last pair of legs in females is nearly twice the body length and is often mistaken for additional antennae, while the actual antennae at the head are long and threadlike. Their large compound eyes are unusual among centipedes — most other species are nearly blind.

Soil centipedes (Geophilomorpha) and stone centipedes (Lithobiomorpha) also occur in Georgia. Soil centipedes are slender, yellowish, and 1 to 3 inches long, found in damp soil and mulch. Stone centipedes are reddish-brown, 1 to 1.5 inches long, with shorter legs than house centipedes. Larger species such as the giant redheaded centipede (Scolopendra heros) can reach 6 to 8 inches in extreme southern Georgia and have a far more serious bite, but they are rare in Metro Atlanta. Centipedes are sometimes confused with millipedes, but the single pair of legs per segment, faster movement, and lack of curling when threatened distinguish centipedes clearly.

Centipedes are strictly nocturnal predators. During the day they hide in dark, moist, tight spaces — under stones, in leaf litter, behind baseboards, in floor drains, inside wall voids, and in cardboard storage boxes. At night they emerge to hunt, moving with the explosive speed for which the house centipede is famous (over 15 inches per second on flat surfaces). They capture prey by lassoing it with their long legs and injecting venom through modified front legs called forcipules.

Centipedes are solitary and do not form colonies or large aggregations. A single house centipede in a basement is far more typical than a group. They are long-lived for invertebrates — adult house centipedes can live 3 to 7 years and continue to molt and add legs throughout their lives. Females lay 60 to 150 eggs in damp soil or rotting wood and tend them until hatching, an unusual behavior among arthropods. Centipedes are most active in spring and fall when humidity is high; they slow down in extreme heat or cold and become inactive during dry conditions. Their prey-driven movement means they follow infestations of other pests, which is why a sudden centipede problem often signals a hidden cockroach or silverfish issue.

Centipedes require constant humidity to survive because their bodies lack the waxy waterproof coating that most insects have. They will die quickly in dry conditions. Indoor habitat is therefore concentrated in the highest-moisture areas of a structure: unfinished basements, crawl spaces, bathrooms (especially around bathtubs and beneath sinks), laundry rooms, garages, and the lowest level of any building with high humidity. Floor drains, sump pump areas, water heater closets, and the pan space under refrigerators all create centipede-friendly microclimates.

Outdoors, centipedes live under stones, logs, mulch, leaf litter, landscape timbers, and woodpiles, in compost heaps, and in the soil itself. Properties with heavy mulch, abundant ground cover, and accumulated organic debris around the foundation support the largest populations. They enter structures through foundation cracks, weep holes, gaps around utility penetrations, under door thresholds, and through unsealed crawl space access points. Older homes with stone or block foundations, fieldstone basement walls, and dirt-floor crawl spaces are particularly prone to indoor centipede issues. Encountering centipedes regularly indoors almost always points to either a moisture intrusion problem (leaks, condensation, poor drainage) or a hidden infestation of insects they are feeding on.

House centipedes and the common smaller species in Metro Atlanta rarely bite humans and their bites are usually unable to penetrate skin. When a bite does occur, it produces localized pain, swelling, and redness similar to a bee sting and resolves on its own within hours. The venom is not medically significant for healthy adults, though individuals with allergies to insect venoms can have stronger reactions. Larger centipede species found in the southern US can deliver a much more painful bite, but they are not residents of Metro Atlanta.

Centipedes do not damage structures, fabrics, food, or stored goods. They do not carry disease and are not vectors of any human pathogen. The risk centipedes represent is signaling — their consistent indoor presence indicates a moisture problem that may invite mold and wood decay, and indicates a hidden prey population (cockroaches, silverfish, ants) that needs to be located and treated. Centipedes themselves are mostly a nuisance issue tied to their startling appearance and movement, but the conditions they thrive in are genuinely worth investigating.

Servitix centipede service is always a two-part inspection. We treat the centipedes themselves with targeted residual application to harborage areas in basements, crawl spaces, bathrooms, and along baseboards, but the more important work is identifying why they are there. We inspect for plumbing leaks, condensation issues, poor crawl-space ventilation, foundation drainage problems, and prey-pest infestations. A centipede problem rarely resolves until those conditions are addressed.

Long-term prevention focuses on moisture reduction and exclusion. Run a dehumidifier in basements and seal crawl-space vapor barriers if not already in place. Repair plumbing leaks promptly, redirect downspouts away from the foundation, and improve grading so water flows away from the structure. Seal foundation cracks, weep holes, gaps around utility penetrations, and crawl-space access points. Outdoors, pull mulch back 12 to 18 inches from the foundation, remove leaf litter and debris accumulating along the structure, and eliminate stacked landscape timbers and woodpiles within 10 feet of the building. Address the underlying pest population centipedes are feeding on with appropriate species-specific treatment. Our maintenance plans include centipede perimeter treatment along with the prey-pest control needed to keep them from returning.