Millipedes

Name: Bowling Green Pest Control
Address: Bowling Green, KY, US
Telephone: (270) 510-0473
Price range: $
Rating: 5.0

(Diplopoda class)

Slow-moving, many-legged arthropods that invade homes in large numbers after heavy rains.

Overview

Millipedes are slow-moving arthropods that are commonly found in damp areas around Bowling Green homes. While they are harmless to humans, structures, and belongings, they can invade homes in startling numbers during heavy rains, droughts, or in fall when conditions change outdoors. Their mass migrations into homes — sometimes hundreds at a time — are their most notable characteristic as a pest. They cannot survive long indoors due to low humidity and typically die within a day or two.

Appearance

Millipedes are elongated, cylindrical, and worm-like, typically 1 to 2 inches long (some species reach 4 inches). They are dark brown, black, or grayish-brown. Each body segment bears two pairs of legs (which distinguishes them from centipedes, which have one pair per segment). Despite their name, most common species have 30 to 90 pairs of legs, not a thousand. When disturbed, they curl into a tight spiral.

Habitat

Millipedes live in moist habitats with decaying organic matter — under leaf litter, mulch, compost, stones, and logs. They are most abundant in areas with heavy mulch, thatch, or ground cover near the foundation. They migrate into homes when outdoor conditions become too wet (heavy rain floods their habitat) or too dry (drought drives them toward moisture). They are also attracted to lights at night.

Diet

Millipedes are detritivores — they feed primarily on decaying plant material, leaf litter, and organic debris. They play an important role in soil ecology by breaking down organic matter and recycling nutrients. They do not eat living plants, home furnishings, or structures.

Lifecycle

Females lay clusters of 20 to 300 eggs in the soil. Young millipedes have only three pairs of legs and add more legs and body segments with each molt. They may take 2 to 5 years to reach adulthood, molting many times along the way. Adults live 1 to 2 years after reaching maturity. They are most active at night and during rainy periods.

Signs of Infestation

!Dozens to hundreds of millipedes appearing around the foundation, on porches, or in basements after rain
!Dead, curled-up millipedes on floors, in window wells, or in basements
!Millipedes crawling up exterior walls or foundations at night
!A faint, unpleasant odor or yellowish secretion from crushed millipedes

Prevention Tips

✓Reduce mulch depth to 2 inches or less within 12 inches of the foundation
✓Remove leaf litter, thatch, and decaying vegetation from around the home
✓Improve drainage to prevent water from pooling near the foundation
✓Seal gaps at the base of doors, windows, and foundation walls
✓Reduce exterior lighting near entry points

Professional Treatment

Perimeter treatments with residual products around the foundation are the primary defense during migration events. Granular products applied in mulch beds, gravel borders, and around the foundation create a barrier. Interior millipedes can be vacuumed up — they die quickly indoors due to dehydration. Habitat modification (reducing organic matter and moisture near the foundation) provides the most sustainable long-term control.

Did You Know?

•Despite their name ('thousand legs'), the record holder species has 750 pairs — the most of any animal.
•When threatened, many species curl into a spiral and secrete a defensive chemical containing hydrogen cyanide.
•They are among the oldest land animals — fossils date back over 400 million years.
•Mass millipede migrations can be so large they have caused trains to lose traction on tracks.

Quick Facts

Size

1 to 2 inches (some up to 4 inches)

Color

Dark brown, black, or grayish-brown

Legs

30 to over 300 (2 pairs per body segment)

Shape

Elongated, cylindrical, worm-like

Also Known As

Thousand legger

Danger Level