Argentine Ant

Argentine Ant Identification and Control

Proper identification is an important first step in controlling ants.

Side view of an Argentine ant under a microscope
Linepithema humile
How to Identify an Argentine Ant

Argentine ants are 1/8 of an inch in length. They have one node (bump between middle and rear body sections) with a sharp peak distinguish it from odorous house ants.

They are light to dark brown in color and they have a 12-segmented antennae without a club. A club is an enlargement at the end of the antennae.

Where Do They Come From

Ants generally enter buildings looking for food. Argentine ants have large colonies that require lots of food.  If they find food, they will lay down a pheromone trail leading more and more ants to the food source.

Argentine ants can build their nests inside a building or in the outdoors.

If the nest is outdoors it can be found in soil, under rocks and logs, potted plants, landscaping mulch, concrete slabs, coal spaces, piles of wood or organic matter, or in exterior walls behind brick.

If the nest is indoors it can be found in wall voids, under carpets and in basements, usually near moisture like sinks, tubs, leaks, etc.

Need Help Controlling Ants?
head view of an Argentine ant under a microscope

Where Do They Live

You can find argentine ants where you find moisture such as water pipes, sinks, potted plants, under boards/stones/plants, and along sidewalks.


Photo to the left by Bradley Reynolds / URL Image Copyright © AntWeb 2002 – 2021. Licensing: Creative Commons Attribution License

Linepithema humile


Small (4-8 mm)


Honeydew, sweets, oils, and insects

Tips & Tricks

Front of a tan home with a green lawn in front

How To Keep Ants Away

Trim back any shrubs or trees that come into contact with buildings. When plants touch a home or building they create an easy way for ants to crawl onto and access the building.

Seal all potential ant entryways. Common entry ways are around windows, doors, and utility lines.

Keep dry pet food in sealed bins and clean up any spills.

Group of ants on a concrete foundation

How To Get Rid Of Ants

Try to locate and eliminate all nests by following ant trails from food source to the nest. This can be done by placing jelly or hot dogs in the yard, waiting 30 minutes to an hour, and then following the trailing ants back to their nest.

Use an insecticidal bait, especially during winter through early spring when populations are small. You can bait throughout the year but early spring leads to best results.

Simply “spraying” for argentine ants rarely gets control and leads to frustration. Baiting or baiting combined with a slow acting-non repellent along the foundation gets better results. Most products that you can buy at the store are not slow-acting or non-repellent.

Stay away from store bought “sprays” for argentine ants.

Controlling these ants is hard, so consider hiring a pest management professional to help.

Don’t let ants take over. Thorn can help.

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How Thorn Can Help

Ants can be difficult to control, but that’s what we are here for. We use a two treatment process to gain control of your ant problem and make sure we get results.

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Thorn's Approach

We take a scientific approach to ant control. We start with an inspection and assessment to help us identify the ants, locate where they are, and create a specific plan for your property. Every home and business is different and requires a unique strategy.


Our Approach to Pest Control

Proper pest management starts with a detailed inspection and assessment from an expert pest professional before treatment. Thorn Pest Solutions uses a three-step process rooted in science to eliminate pests with long-term results.

Driven By Science. Lead By Service.

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Assess Situation

First, we identify the root problem(s) with a site assessment. Pests are almost always an indicator of an environmental condition. This will determine the best actions to provide short and your long-term results against pests.

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Execute Action Plan

Next, we develop a plan to fix the problems we discovered. This includes solving current pest issues, eliminating conducive conditions, and monitoring for future pest activity. Good pest management starts with a good plan.

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Track Success

Lastly, we implement the solutions we developed including inspection, monitoring, and preventing future pest infestations. Good pest control requires a good offense and not just defense. Prevention is key.

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Client Testimonials

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