Sticky traps, pitfall traps, and simple DIY moisture traps are the most practical options for catching millipedes in and around your home. Because millipedes are ground-dwelling creatures that wander into living spaces by accident rather than intent, trapping them relies on intercepting their crawling paths rather than luring them from a distance. The right trap depends on whether you’re dealing with a few strays indoors or a larger population outside.
Why Millipedes Are Easy to Trap
Millipedes spend their lives crawling along the ground, feeding on decaying organic matter like leaf litter, mulch, grass thatch, and even moist pet food left outside. They don’t fly, jump, or climb smooth vertical surfaces well. This makes them ideal candidates for simple ground-level traps. They also follow edges, walls, and other linear features as they move, which means you can predict their travel routes and place traps accordingly.
Most millipedes that end up indoors are seeking moisture or have simply wandered in through gaps near doors, windows, or foundation cracks. They don’t breed indoors and typically die within a few days once inside because the environment is too dry. Trapping works best as part of a broader approach that includes reducing moisture and sealing entry points.
Sticky Traps and Glue Boards
Sticky traps are the simplest and safest option for catching millipedes inside your home. These are the same flat glue boards sold for catching spiders, cockroaches, and other crawling pests. Place them flat on the floor along baseboards, near doorways, in basement corners, and anywhere you’ve seen millipede activity. Millipedes follow walls and edges, so positioning traps flush against these surfaces catches far more than placing them in the middle of a room.
You can also use sticky traps outdoors near foundation walls, garage entries, and sliding doors. Outdoor placement works best under a slight overhang or cover to keep rain from degrading the adhesive. Check and replace traps every week or two. Beyond killing individual millipedes, glue boards serve as a monitoring tool: if you’re catching dozens, you know there’s a larger population nearby that needs attention at the source.
Pitfall Traps for Outdoor Use
Pitfall traps are cups or containers buried in the ground so the rim sits flush with the soil surface. Millipedes and other ground-crawling creatures simply walk over the edge and fall in, unable to climb back out. This is one of the oldest and most effective methods for trapping soil-dwelling invertebrates.
A basic DIY version requires nothing more than a plastic cup or small container. Dig a hole, set the cup inside so its top edge is level with the surrounding ground, and you have a functional trap. For better results, use two nested cups: one sits inside the other so that if rain fills the bottom cup, it floats the inner cup upward and prevents your catch from washing away. This double-cup method is standard practice even in professional entomological fieldwork.
Adding a small cover above the trap, propped up on stones or stakes about an inch above ground level, keeps out rain and debris while still allowing millipedes to crawl underneath and fall in. You can also add short guide walls radiating outward from the trap, made from strips of cardboard, thin wood, or even aluminum flashing pushed a couple centimeters into the soil. These guide vanes intercept crawling millipedes and funnel them toward the cup opening, significantly increasing catch rates.
What to Put in the Cup
For a simple kill trap, an inch or two of soapy water in the bottom works fine. The soap breaks the surface tension so millipedes sink and drown rather than floating and potentially escaping. If you just want to monitor activity without killing, leave the cup empty or place a damp paper towel at the bottom, and check the trap each morning.
Professional researchers typically fill pitfall traps with a preservative mixture (propylene glycol and alcohol) to keep specimens intact for study. This isn’t necessary for home pest control, and these chemicals can be harmful to pets or wildlife that investigate the trap. Soapy water is safer and perfectly effective for residential use.
DIY Moisture Traps
Since millipedes are strongly attracted to damp environments, you can exploit this behavior with simple moisture traps. Lay a damp towel, wet newspaper, or a piece of damp cardboard flat on the ground in an area where you’ve noticed millipede activity, especially near garden beds, mulched areas, or along the foundation. Do this in the evening when millipedes are most active.
By morning, millipedes will have gathered underneath seeking the moisture and darkness. Pick up the material, shake the millipedes into a bucket of soapy water, and repeat nightly. This is surprisingly effective during peak activity periods, particularly in late summer and fall when millipede populations are at their highest and most likely to migrate toward buildings.
Overturned flowerpots, wooden boards, and even halved melons or grapefruit rinds placed cut-side down work on the same principle. Anything that creates a dark, moist microhabitat at ground level will concentrate millipedes in one spot where you can easily collect and dispose of them.
Where to Place Traps
Trap placement matters more than trap type. Millipedes enter homes from the surrounding landscape, so the most productive locations are along their invasion routes.
- Indoors: Along baseboards in basements, garages, and ground-floor rooms. Near exterior doors, especially sliding glass doors. In bathroom corners and laundry rooms where humidity is higher.
- Foundation perimeter: Directly against the outer foundation wall, particularly on sides of the house that stay shaded or moist. This intercepts millipedes before they find entry points.
- Garden borders: At the transition between mulched beds and lawn, or between garden beds and paved areas. Millipedes stage in mulch and leaf litter before migrating outward.
- Near known entry points: Around basement window wells, utility pipe penetrations, and any cracks or gaps where you’ve seen millipedes entering.
Reducing Millipede Numbers at the Source
Traps catch individual millipedes, but they won’t solve a large infestation on their own. Millipede populations build up in areas with abundant decaying organic matter and consistent moisture, so the most effective long-term strategy combines trapping with habitat modification.
Pull mulch back at least six inches from your foundation. Clear leaf litter, grass clippings, and other organic debris from the perimeter of your home. Fix leaky outdoor faucets, improve drainage around the foundation, and make sure gutters direct water well away from the building. Remove pet food bowls from porches and patios each evening, since millipedes readily feed on moist pet food left overnight.
Seal gaps under doors with weatherstripping, caulk cracks in the foundation, and make sure basement windows close tightly. A dehumidifier in a damp basement makes the indoor environment far less hospitable to any millipedes that do find their way inside. When you combine these steps with strategic trap placement along entry routes, you can bring even a heavy seasonal invasion under control within a few weeks.