What are Argentine Ants?
Argentine ants (Linepithema humile) are the ultimate “supercolony” builders. They are famous for their cooperative nature—unlike other ants, different Argentine ant colonies don’t fight; they merge to form massive, landscape-scale networks.
Argentine Ant Profile
| Feature | Details |
| Scientific Name | Linepithema humile |
| Size | Workers: 2.2mm to 2.8mm (roughly 1/8 inch) |
| Other Names | Sugar ant, Tramp ant |
Key Identification
Argentine ants are often confused with Odorous House Ants, but they have a few distinct giveaways:
- Uniformity: They are monomorphic, meaning every worker you see is the exact same size.
- The Trails: They travel in massive, persistent, and highly organized “highways” that can be hundreds of feet long, often following baseboards or sidewalk edges.
- Appearance: They are light to dark brown and have a smooth, shiny body with a single, scale-like node on their waist.
- The Scent: When crushed, they produce a faint, musty odor, which is much less intense than the rotten coconut smell of the Odorous House Ant.
About Argentine Ants
Originally from South America, Argentine ants are one of the world’s most successful invasive species. Their strength lies in their polygynous nature—one colony can have hundreds of queens. Because these queens and workers move freely between different nesting sites, they form “super colonies” that can take over entire city blocks.
They are moisture-obsessed. You will often find them in damp soil, under mulch, or near irrigation lines. When the weather gets too wet or too dry, they “bud” (split) and move indoors, seeking the stable climate and easy food sources of your kitchen.
How to Treat
Argentine ants are a “marathon, not a sprint” pest. If you use the wrong products, you will make the problem worse.
- Avoid Repellent Over the Counter Sprays: Standard hardware store sprays act as a “warning” to the colony. This causes budding, where the colony splits into several new nests to survive, effectively multiplying your infestation overnight.
- Use Non-Repellents: Licensed professionals, such as Infinite, use non-repellents. The ants cannot detect these, so they walk through them and transfer the active ingredient back to the queens through a “Trojan Horse” effect.
- Large-Scale Baiting: Because their populations are so large, you need a high volume of bait. Here at Infinite, we use all EPA solutions that are designed to eliminate the problem while staying eco friendly. As we know, as your experts, their dietary needs change throughout the year therefore, we constantly rotate our products so they do not become immune.
- Honeydew Management: They love “farming” aphids on garden plants for their sugary honeydew. Treating your plants for aphids can actually cut off the ants’ primary food source and force them to take your bait.
Frequently Asked Questions About Argentine Ants
Why are there so many Argentine ants in my house after it rains?
Argentine ants nest in shallow soil. When heavy rain floods their nests, they seek higher, drier ground—which usually means moving into your wall voids and kitchen.
Do Argentine ants bite or sting?
Argentine ants do not have a functional stinger and their mandibles are too small to break human skin effectively. They are purely a “nuisance pest,” though they can contaminate food and displace native wildlife.
How long does it take to get rid of an Argentine ant super-colony?
Because of their interconnected nature, complete elimination requires on going treatments. Success requires consistent baiting and addressing moisture issues around the perimeter of the home.
