Updated January 2025 · 6 min read · PestID Editorial Team
Ants are the most common household pest in the US, affecting over 90% of homes at some point. The key to elimination isn't spraying them — it's targeting the colony with bait. Here's how to do it right.
Look for: tiny black/brown ants (odorous house ants), red fire ants outdoors, large black carpenter ants in wood. Species determines treatment.
Raid and similar sprays kill on contact but scatter the colony, making elimination harder. Stop using them immediately.
Place TERRO liquid bait stations along ant trails near entry points. Worker ants carry the bait back to the queen and wipe out the colony in 1–2 weeks.
Apply a bifenthrin-based product (Talstar P) around your foundation, 3 feet up and 3 feet out. Creates a barrier they can't cross.
Caulk gaps around pipes, windows, and door frames. Ants can enter through cracks as small as 1/16 inch.
Store food in airtight containers, wipe down counters, and don't leave pet food out. A single breadcrumb can attract hundreds of ants.
Reapply bait if ants ignore it (try a different flavor). Most infestations are eliminated within 2–4 weeks.
If you only kill foragers with spray, the queen keeps producing more. Bait is the only way to kill the queen and collapse the colony permanently.
Most household ants are just nuisances. Fire ants can sting severely. Carpenter ants can damage wood structures over time but don't eat wood like termites.
Liquid borax bait like TERRO typically shows results in 3–7 days, with full colony elimination in 1–2 weeks. Patience is critical — don't disturb the bait.
Food (especially sweets and proteins), moisture, and shelter. A clean kitchen is your best prevention. Leaky pipes and standing water also attract ants.
Vinegar disrupts ant scent trails temporarily but doesn't kill the colony. It's fine as a short-term deterrent but won't solve an infestation.
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TERRO T300B Liquid Ant Bait Stations
Talstar P Professional Insecticide
Amdro Fire Ant Bait Granules
Cyper WS Cypermethrin Insecticide
Harris Food Grade Diatomaceous Earth (2lb)
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