Get rid of ants in your NC home: Pesticides and intervention tricks to keep them out
You can get ants out of your home — and make them stay out — this warm-weather season with the right pesticide and some intervention tricks.
Last year, The News & Observer spoke with Sydney Crawley, an NC State professor and extension specialist with expertise in insect and vertebrate pests, to learn why they’re in our spaces and how we can reclaim our homes.
“There is some value in making sure that native ants are protected,” she said. “However, when ants start invading the home, contaminating food and annoying people and pets, I believe that control of some sort is warranted.”
Why do ants enter homes?
Ants come inside homes in search of three basic things: food, water and nesting habitat.
Food is the No. 1 reason, and many species of ants love protein, sweets and grease.
“Once a foraging ant has found suitable food, they will communicate this to other foragers, usually through a trail pheromone,” Crawley said.
“This leads more and more workers to the food source, explaining why you may see more ants over time.”
How to get rid of ants in NC homes
Remember these three things to get rid of ants: Exclude, sanitize and apply pesticides.
1. Exclude: Caulking or sealing openings that could allow ants inside can prevent invasion. It might also help to trim back ornamental plants and trees that touch your home.
“There are many ant species that protect aphids that live in plants in exchange for honeydew. Branches serve as bridges that afford ants a convenient way right into your house,” Crawley said.
You should also repair rips in your screens, replace weather stripping and check around electrical conduits to ensure your home is as tightly sealed as possible.
2. Sanitize: Keep your food sealed. Ants in a home will commonly feed on food crumbs, liquid drippings or debris on dirty dishes.
“I see lots of ants in pet bowls, for instance,” she said.
Leaky faucets and standing water can attract ants as well. Correct leaky faucets and stagnant drains to keep ants away.
3. Apply pesticides: Ant baits can help most ant problems. Sugar bait with a toxicant, such as boric acid, typically works well, since many ant species that enter homes are sweet-loving ants.
This will work slowly as foraging ants take food back to the queen. You must kill the egg-laying queen to get rid of the colony.
If you don’t see any reduction in ant activity after a week, it might be because ants are not currently feeding on sweets, so you might have to switch to a protein or fat-based carrier.
“The product label should tell you what the bait matrix is and whether it is meant for sweet-loving ants, or others,” she said.
Here are some kinds of bait to consider:
Gel baits: You can apply this to the hidden areas of your home.
Granular baits: These can be put into the yard, helping attack the problem from the inside and outside.
General liquid pesticides: Ready-to-use sprays can be applied to the foundation to discourage ants (and other insects) from entering in the first place.
An important note: If you are using bait, do not spray ants or ant trails with chemical products, such as Raid aerosols, to kill them.
“This will contaminate the bait, repel ants from it, and you will be starting from square one,” she said.
Do essential oils, home remedies work on ants?
Most home remedies are ineffective, Crawley said, including essential oil repellents you may read about online.
“I recommend sticking with federally registered products and adhering to the label verbiage for application,” she said.
Why are ants important?
While there’s no benefit to having ants inside your home, native ant species — when kept outside — are environmentally beneficial.
“Ants are predators that can control many nuisance insects in the lawn and landscape. Native ants are important ecosystem servicers,” Crawley said.
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