Millipedes thrive outdoors and under concrete slabs where there is moisture and decaying organic matter such as trash, leaves, grass clippings, mulch and unclean drains. They can build explosive populations very quickly and become structural pests when they invade homes in staggering numbers. This usually happens when standing water forces them out of their natural habitat.

Millipedes are usually brown or black in color but may be seen in brighter colors such as orange or red. They can be up to 4 inches long.


Females lay 20 to 300 eggs in nests in the soil which hatch in several weeks. Initially, the young have only three pairs of legs. Millipedes will usually molt 7 to 10 times before becoming adults.


Millipede control begins outdoors by removing the moist harborages they are nesting in. Firewood, should be stored off the ground. The lawn should be mowed and edged to promote drying. Flower beds should not be over-mulched.

Entry into building should be prevented by sealing and caulking of gaps around siding, windows and doors.

Micro-encapsulated and wettable powder products are the most effective in stopping Millipede invasions. Dusts can also be applied to crawlspace areas where these insects spend time.

A professional control process will include:

  • Inspection – The first step in any professional treatment program is, inspection.
  • Identification – Locate nesting sites.
  • Determination – Once you have identified the nesting sites you must determine the proper treatment process. Which treatments will work best for this infestation?
  • Control – Making the correct application of product.
  • Communication – The last part of a successful millipede control is communication. Our technician reports, what was found during our inspection, what we did about it and what you can expect from our treatment. He will also discuss if further follow up treatments should be scheduled to make sure the problem is solved.
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