Natural Removal of Carpenter Ants (safe and nontoxic)

Easy, natural DIY method for getting rid of a carpenter ant infestation inside the home without the use of chemicals or other toxic substances.

We’ve had two major infestations of carpenter ants to deal with during the 3 decades of living in our home.

The first occurred shortly after we moved in. Our house was built in 1951 and sits in a semi-rural neighborhood with lots of trees, vegetation, and moisture due to a backyard lake.

Needless to say, it is the perfect environment for critters of all kinds, including carpenter ants.

The first infestation had me calling the pest control company in a hurry!

Pest Control for Carpenter Ants

Carpenter ants are huge and very scary looking.

While they do sometimes bite, there isn’t any poison, so if you are careful, you can pick them up with your fingers and throw them in the toilet or flush down the drain with no problem.

At the time, though, I didn’t know any of this, so seeing dozens of large ants running around my (then) retro-style 1970s orange and yellow kitchen was not a pretty sight.

I picked up the phone and called pest control and after a couple of toxic sprayings around our house, yard, and then in our attic over the course of a week or two, the carpenter ants were gone.

The Natural Approach

Our second infestation of carpenter ants happened about 10 years later, and this time, I handled it very differently.

Having the knowledge and wisdom of nearly a decade of green living behind me, I was determined and very confident I could resolve this infestation with zero pesticides and no panicked call to pest control.

My youngest was especially freaked out by the enormous size of the carpenter ants even after I explained that they don’t have a sting like other types of ants and picked up one in my fingers to show her.

Unfortunately, my little pep talk and demonstration didn’t do much to alleviate her fears of these intimidating, wriggling creatures.

The carpenter ants were swarming in our kitchen and bathrooms and after starting with just one or two here and there, over the course of a week, they came in by the dozens overnight while we slept making for a very scary turning on of the lights in the morning if you know what I mean.

We spent the first 15 minutes of the morning vacuuming them up before we could even get started with breakfast!

Find Where The Ants are Trailing

After watching and observing their patterns over the course of a day or two, I determined that their primary mode of entrance into our home appeared to be the drain of the dishwasher.

Knowing where the carpenter ants are getting into the house is a helpful piece of information, but not entirely necessary if you wish to eradicate them yourself via nontoxic measures.

In our case, the dishwasher drain seemed a likely ground zero, so I mixed up my “carpenter ant ambrosia” and set the bait.

How to Mix Nontoxic Bait

My one cup of ant bait consisted of the following all of which cost less than $1. Believe it or not, this is all that was needed to get rid of all the ants quickly and easily.

• 1/3 cup of powdered white sugar
• 2/3 cup boric acid (where to find)

That’s it!

Note: you may use borax powder, but the mixture will be reduced strength and may not work as well or as quickly.

When I took our container of boric acid out of the garage utility cabinet, it consisted of a bunch of hardened chunks, as I hadn’t used it in a long time.  

So, I took out my mortar and pestle and pounded a few big pieces back into powder. Then, I measured it into a small ziplock bag that contained the appropriate amount of powdered sugar.

Boric acid is a colorless white powder that is a mild antiseptic, but certainly not a problem to the health of your family even if you touch it with ungloved hands. It is naturally found in some volcanic environments near Tuscany and Nevada.  

Boric acid and its salts are found in seawater and plants including almost all fruits.

Incidentally, boric acid foot soaks are excellent as a natural remedy for athlete’s foot and other fungal infections of the skin.

Keep Away from Pets and Children

Of course, you need to keep containers of concentrated boric acid powder away from small children and pets. It is poisonous if ingested or inhaled in large quantities.

However, it is probably the least toxic form of insect bait you can use around your home.

The one exception is diatomaceous earth, which unfortunately doesn’t work as well or as quickly for large ants where I live.

Where to Place the Bait

I placed a couple of tablespoons of the carpenter ant bait in the lid of an empty jar and placed it inside the dishwasher on the bottom near the drain just before going to bed.  

Before I did this, I was careful to run a load of dishes and empty everything out so the dishwasher was completely void of any plates, glasses, or utensils.

A Happy Ending to our Carpenter Ant Infestation

The next morning we were delighted to see that there were no carpenter ants running around the kitchen!  

When I opened the dishwasher to have a peek, they were swarming around the bait but were totally confined to that area.

I gently closed the door of the dishwasher and left the ants there, happily eating away at the bait they would take back to their nest to kill the whole colony.

It took a few days, but gradually, the carpenter ants swarming inside the dishwasher completely disappeared with nary a stray one left!

When I needed to run the dishwasher in the interim, I simply removed the container of bait, ran a load, emptied the clean dishes, and then replaced the bait near the dishwasher drain.

Try this simple, effective, and non-toxic method!

Best of all, no call to pest control is needed to come and spray who-knows-what hormone-disrupting, carcinogenic chemicals around your home for your family to breathe and absorb!

If you would like more information on safe methods for ridding your home of unwanted visitors, see my natural pest control category here with over two dozen articles!