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(Porcellionidae)
Sow bugs invade in silence, multiplying in damp, hidden areas—then emerging in basements and crawlspaces as a sign of deeper moisture problems.
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Sow Bugs thrive in damp, dark environments and often invade basements, crawlspaces, and the foundation areas of homes—especially in Alaska’s wet climate. While they don’t bite or spread disease, their presence is a clear sign of excess moisture and can indicate conditions that attract other pests. At Alaska Pest Management, we bring over 30 years of experience, science-backed techniques, and advanced tools to eliminate sow bugs and help you correct the moisture issues that invite them in.
Sow bugs—also known as woodlice—are small, gray, segmented crustaceans that thrive in moist environments. Sow bugs and Pill bugs look almost identical and have the same natural habits but are crustaceans from different families. In Southeast Alaska’s damp climate, they’re commonly found in basements, crawlspaces, and around the foundation of homes, especially in shaded, wet areas.
Sow bugs are about ½ inch long, oval-shaped, and gray or slate-colored with segmented, armored plates on their backs. They have seven pairs of legs and two short tail-like appendages that distinguish them from pill bugs, which can roll into a ball (sow bugs cannot).
No, sow bugs are harmless. They do not bite, sting, or spread disease. However, they can become a nuisance when they invade homes in large numbers or when they are found crawling in damp indoor areas like basements or laundry rooms.
Sow bugs are nocturnal and most active at night when humidity is high. You’re more likely to see them during rainy periods or when the ground is saturated and they seek shelter in man-made structures to avoid drowning.
Sow bugs enter homes in search of moisture and shelter. They typically crawl in through gaps near foundations, doors, or basement windows, especially if the surrounding area is rich in mulch, leaves, or decaying wood.
To prevent sow bugs:
Yes, often. Since they thrive in damp conditions, a sow bug sighting indoors may point to excess moisture, drainage issues, or decaying organic material near the foundation. These conditions can also attract other pests like centipedes or earwigs.
If you’re seeing sow bugs indoors frequently, it’s time to address moisture levels and entry points. Alaska Pest Management can identify problem areas, recommend moisture control strategies, and apply targeted treatments to prevent further intrusion.
Don’t let sow bugs turn your basement into a bug haven—contact Alaska Pest Management for effective, science-backed solutions today.
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