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Indoor Fire Ant Invasions

Fire ants entering a building around an infrequently used door.
Fire ants entering a building around an infrequently used door.

Fire ants are outdoor, soil-dwelling insects. They rarely invade buildings, but when they do, they usually cause problems.

Indoor fire ant invasions happen for two reasons. The first is when foraging workers wander into a building, find a food source, such as pet food or spilled food crumbs, and recruit other workers to this food source. This results in a trail of workers traveling back and forth from the outside nest to the inside food source and a concentration of ants around the food source.

The second cause of indoor fire ant invasions is when an entire colony of fire ants attempts to relocate because of disturbance by flooding, drought, landscaping or other causes. This is less common, but more distressing. In this case, you usually see large numbers of workers carrying their white brood into the house. They may also bring particles of soil inside. These displaced colonies are usually very agitated and will sting aggressively and in large numbers. They have to be controlled quickly and effectively. See Extension Publication 2443, Control Household Insect Pests, Pages 15-16, for more details on how to control and prevent indoor fire ant invasions.

Contact information for Dr. Blake Layton.

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News

A person holds a canister of dry powder pesticide and a measuring spoon of powder over a fire ant mound.
Filed Under: Fire Ants, Insects-Home Lawns, Insects-Pests, Turfgrass and Lawn Management September 11, 2018

Even if you preventatively treat your yard periodically through the year for fire ants, you’ll still see mounds pop up.

There are two ways to treat these mounds: liquid drenches and dry powders. (File photo by MSU Extension Service.)

A close-up of gloved hands pouring a liquid drench pesticide into a measuring cup.
Filed Under: Fire Ants, Insects-Home Lawns, Insects-Pests, Turfgrass and Lawn Management August 28, 2018

Fire ant mounds always pop up right where you don’t need them – in the flower bed you planned to weed tomorrow, next to the mailbox that needs to be reset, and near the patio where you are throwing a party tonight. (Photo by Brian Utley/Cindy Callahan)

A close-up of a fire ant mound.
Filed Under: Commercial Horticulture, Livestock, Pets, Fire Ants, Insects-Home Lawns, Insects-Pests, Turfgrass and Lawn Management, Vegetable Gardens August 10, 2018

Fire ants are everywhere. If you’ve thrown your hands up in exasperation trying to deal with them, don’t give up just yet. (File photo by MSU Extension Service)

A paper wasp on a multi-cell nest.
Filed Under: Insects-Crop Pests, Insects-Forage Pests, Fire Ants, Household Insects, Insect Identification, Termites, Insects-Home Lawns, Insects-Pests July 31, 2018

Mississippi has an abundance of bugs, especially in the warmer months. We are all familiar with mosquitoes, bumblebees, and house flies. But I bet there are bugs around your house and yard that you can’t identify. (Photo by Blake Layton)

Invasive fire ants crawl over a mound of soil. (File photo by MSU Extension/Kat Lawrence)
Filed Under: Fire Ants November 8, 2017

Just when we think we’ve conquered our tiny foes, it rains, and fresh fire ant mounds pop up in our yard.

Like many tasks around the house, fighting fire ants feels like a constant battle. My husband and I finally started seeing some progress when we followed recommendations from MSU Extension’s expert, Dr. Blake Layton. (Yeah, that’s a side benefit of my job, learning all kinds of practical information!)

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Fire Ant Control

Tuesday, April 25, 2017 - 1:45pm

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Entomology; extension insect identification; fire ants; termites; insect pests in the home, lawn and