Pavement ants are native to Europe and were mostly brought over to the colonies in the 1700s when colonists were carrying soil on the ships for ballast.
Once the ships reached the colonies the soil was offloaded, along with the ants living in it. Today these ants are spread over the East Coast and can be found in California and Washington. While passive by nature, pavement ants pose little threat to humans and pets but can cause a good deal of annoyance.
Either light brown or black in color, these ants are typically 2.5 to 3 mm long, 1/10 to 1/16 inches. Winged breeding ants can be twice as large as the normal working ant. Pavement ants can’t bite but they do have the ability to sting.
A poison is spread over the hill or on one of the highways that the worker ants travel. The poison bait is taken back to the colony and shared with the rest of the pavement ants.
This will effectively kill off most of the nest. Some baits use a stronger poison that may kill the worker ants before they get the chance to share it with the colony. Instead, try to find a weaker poison. It may take a number of applications and several weeks to kill off the nest.
Sprays can be used to kill off the worker ants seen searching for food or water or can be applied to the ant nests. If you can’t find the nest then sprays can be used on the highway areas. Look for worker ants around door thresholds, cracks in walls, windows, plumbing areas, and behind appliances.
Research has shown that when used properly insecticides pose no threat to pets or children. So make sure to carefully read over instructions before using any products.
If you want to try a more green treatment before chemical control methods there are a few ways to do this. For the ants that may have invaded your home, you can use a cleaning mix of vinegar, water, and a dozen drops of tea tree oil. Spray this mix around counters, doorways, windows, and other possible entry points.
This can cause the ants to lose the scent of their highways, causing them to get lost. To kill off a nest all you need is water and a large pot. Bring a gallon of water to a heavy boil and then pour over the nest.
The heated water will kill the ants you can see and will brown many of the ants in the nest. You will have to do this once to twice a day until the nest is inactive. While this method works well for pavement ants, it does not work on ants that spread out their nests.
There are very few ways to prevent any ants from trying to colonize your yard, but there are things you can do inside to help keep them outside. Regular cleaning is the best prevention as it removes any food sources the ants may find inside.
Check your home foundation for any cracks and fix them before ants can nest. You can put baby powder across any entry point. The ants don’t like the small partials sticking to them as it mixes up their scent signals. You can also plant an ant barrier of sorts around your home. Mints, hot peppers, and other strong scents plants typically deter ants.
Living with pavement ants can be a hassle, but with localized colonies and passive natures, they can be controlled much easier than other varieties of ants. If you find yourself with an infestation that you can’t control contact a professional ant control expert.