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Pest Education • DFW Pest Control
Argentine Ant Control in DFW
Argentine ants form massive, cooperative colonies and trail indoors for water and sweets. Learn why spraying backfires and baiting works.
Family-OwnedVeteran-OwnedSince 2016
Reviewed and updated June 2026
At a Glance
Argentine ants build huge interconnected colonies with many queens. Because spraying splits colonies, slow-acting baits are the key to control.
Quick Facts
- Size: Tiny, about 1/8 inch
- Color: Light to dark brown
- Colony: Huge, many queens, interconnected
- Concern: Persistent indoor trails for water and sweets
What Are Argentine Ants?
Argentine ants are small brown ants that form enormous colonies with many queens. Neighboring nests cooperate instead of fighting, so a single 'super-colony' can stretch across multiple yards.
They trail in long lines to food and water and move indoors during heat, drought, or heavy rain, especially toward kitchens and bathrooms.
How to Control Argentine Ants
Spraying visible trails kills workers but can cause the colony to split and spread, making things worse. Slow-acting baits that workers carry back to the queens are far more effective.
- Wipe trails, store food sealed, and fix moisture and leaks.
- Trim vegetation touching the house and move mulch off the foundation.
- Seal entry points around windows, doors, and utility lines.
- Use ant baits and avoid repellent sprays on trails so foragers keep feeding.
Treat the Source
Match the approach to the pest and conditions, not just the ones you see.
Explore services →Prevent Return
Reduce moisture, food, and entry points so the problem does not come back.
Request an estimate →Treatments are selected and applied per their labels. Tell us about children, pets, edible gardens, beehives, and other sensitive areas before service, and follow all preparation and re-entry instructions. More on pet- and pollinator-conscious treatment →
Common Questions
Why do Argentine ants keep coming back?
Their colonies are huge and have many queens, so killing surface workers does not end it. Baiting that reaches the queens, plus moisture and entry-point control, is what works.
Are Argentine ants harmful?
They do not sting or damage structures, but they contaminate food, are a persistent nuisance, and can farm aphids on plants.
Why did spraying make it worse?
Repellent sprays can cause Argentine ant colonies to fragment and form new nests, so baiting is preferred over spraying trails.
Sources & Further Reading
Guidance changes over time. Follow current product labels and local recommendations. This page is educational and is not medical advice.
Need Help With Argentine Ant?
Call or email for a free estimate. We’ll recommend an approach that fits your property.