Centipede & Millipede
Control in Algona, WA

Why Centipedes and Millipedes Enter Algona, WA Structures

Centipedes and millipedes are terrestrial arthropods that require high moisture environments to survive. They respire through their body surface rather than through a sealed respiratory system, which means they are highly susceptible to desiccation in dry conditions. This physiological dependency on moisture explains their behavior of seeking out the most consistently moist areas available, which in many Algona, WA properties means basement floors, bathroom areas, crawl spaces, and the interior of walls adjacent to plumbing leaks or condensation-prone pipes.

Although centipedes and millipedes are often lumped together because of their similar appearance, they are actually quite different in their biology and the risks they present. Understanding which species is invading your property is essential for designing an effective control program, because the two groups require somewhat different treatment approaches and have different primary harborage areas.

Centipedes vs. Millipedes: Understanding the Difference

Our Treatment Approach for Algona, WA Properties

Nordic Pest Control addresses centipede and millipede problems through a combination of moisture assessment, exterior harborage reduction, perimeter barrier treatment, and interior spot treatment in active infestation areas. The relative weight we place on each component depends on which species is involved and where the primary harborage is located.

For millipede problems, the exterior environment is the starting point. Millipedes breed and develop in moist organic matter accumulated adjacent to the structure, particularly in deep mulch beds, leaf litter, decaying wood debris, and compost areas within a few feet of the foundation. Reducing the depth of mulch in foundation beds to no more than two to three inches, removing leaf litter that accumulates against foundation walls, and correcting soil grading that directs rainwater toward the foundation all reduce the breeding habitat that sustains millipede populations. Perimeter treatment applied to foundation bed areas and the soil interface at the structure base intercepts migrating millipedes before they find entry points.

For centipede problems, the primary focus shifts to interior moisture conditions and prey insect populations. We identify moisture sources including plumbing leaks, condensation on cold-water pipes, inadequate crawl space ventilation, and basement humidity levels that support centipede survival, and recommend specific corrections. Treating the prey insect population through our general pest program removes the food resource that centipedes depend on, making the environment uninhabitable regardless of moisture levels. Direct treatment of harborage areas with residual products eliminates the current centipede population while the environmental corrections take effect.

Moisture Conditions That Drive Infestations in Algona, WA

• Unventilated or inadequately ventilated crawl spaces that maintain near-saturation humidity year-round, supporting both arthropod populations and wood-decay fungal growth
• Plumbing supply and drain lines that develop slow leaks inside wall cavities, creating persistently moist wood and insulation that attracts moisture-dependent arthropods
• Basement perimeter walls that experience seasonal water intrusion through foundation cracks, creating moist floor areas where millipedes concentrate
• Deep ornamental mulch beds maintained directly against foundation walls that retain moisture and support organic decomposition ideal for millipede breeding
• Air conditioning condensate lines that drip near foundation penetrations, creating a consistent moisture source that attracts both centipedes and their prey insects
• Improperly graded soil around the foundation that directs surface water toward the structure rather than away from it, keeping foundation soils perpetually moist