Central Iowa Pest Guide
Ants in Des Moines Homes: Species, Behavior & Home Remedies
Ants are the most common insect complaint in Des Moines homes from March through October. The species matters, because carpenter ants damage wood while most others are strictly a nuisance.
What Are Ants?
Odorous house ants are small dark ants that give off a coconut- or blue-cheese-like smell when crushed. They form large colonies with many queens and readily nest indoors under sinks and behind walls.
Pavement ants nest under sidewalks, driveways, and slabs and push out small soil craters at cracks and expansion joints.
Carpenter ants are large — a quarter to a half inch — and typically black. They excavate galleries in wood that is or has been damp, so they are a moisture indicator as much as a pest.
Ant colonies are social. The workers you see are a tiny fraction of the colony, and killing them does nothing to the queens producing replacements.
Signs of Ants in Your Home
- Trails of workers along counters, baseboards, or foundation edges
- Small piles of fine soil at sidewalk and slab cracks (pavement ants)
- Coarse sawdust-like frass with insect body parts near wood (carpenter ants)
- Winged swarmers indoors in spring, which usually indicates a nest inside the structure
- Faint rustling in wall voids in quiet rooms (large carpenter ant colonies)
Why Ants Matter
Most ants contaminate food and are a persistent nuisance. Carpenter ants hollow out structural and trim wood over time, and their presence often reveals a leak or chronic moisture problem.
When Ants Are Active in Central Iowa
Central Iowa ant activity begins with spring thaw in March, peaks May through August, and often surges indoors after heavy rain or during dry spells when ants come inside for water.
Home Remedies & DIY Control
- 1Use bait, not spray. Contact sprays kill visible workers and can cause some species to split the colony into more nests. Slow-acting sugar or protein baits are carried back to the queens.
- 2Place ready-to-use liquid ant bait stations directly on active trails and leave them undisturbed for one to two weeks. Seeing more ants at the bait at first is normal and good.
- 3Stop cleaning trails while baiting. Wipe up trails only after the bait has done its work.
- 4Remove competing food: wipe counters, store sweets and pet food sealed, take out recycling with sugary residue, and rinse containers.
- 5Fix moisture. Repair leaking pipes, clean gutters, redirect downspouts, and dry out damp crawl spaces — this is essential for carpenter ants.
- 6Trim tree branches and shrubs touching the roof and siding; they act as bridges for carpenter ants.
- 7Move firewood, mulch beds, and landscape timbers away from the foundation, and seal cracks in the slab and around utility entries.
- 8For a homemade option, a mix of one part borax to about three parts sugar dissolved in warm water on a cotton ball can work as a sugar bait — keep it strictly out of reach of children and pets.
When to Call a Professional
Call a licensed Iowa pest professional for carpenter ants, for swarmers emerging indoors, or when trails return within days of baiting for several weeks running.
Voice calls only — this line does not receive text messages
Government & University Sources
- Iowa State University Extension — Ants in the Home
- University of Minnesota Extension — Carpenter Ants
- U.S. EPA — Introduction to Integrated Pest Management
This article is general educational information for central Iowa homeowners, not professional, medical, or legal advice. Always read and follow pesticide label directions.