Getting rid of carpenter ants requires a combination of direct treatment, prevention, and in some cases, professional help. Here are the most effective strategies:
- Locate and Treat the Nest: If you can find the nest, apply a slow-acting toxic bait or an insecticidal dust directly into the nest. Baits allow worker ants to carry the poison back to the colony, which is critical for exterminating the entire nest[1]. If the nest is located in a wall void, small holes can be drilled to apply dust or spray formulations labeled for indoor ant control[2].
- Use Slow-Acting Baits: Place commercial gel baits mixed with sugar and a little milk near ant trails. The ants will take the bait back to their nest, killing the colony over several days. Avoid fast-acting insecticides, as they only kill workers and leave the main colony untouched[1].
- Don’t Spray Visible Ants: Spraying foraging ants as they emerge can prompt the colony to move or split, making the infestation worse. Instead, focus on baiting and nest treatment[1].
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Structural Repairs and Prevention:
- Inspect and seal any cracks, gaps, or holes in your home’s foundation, walls, and windows[3].
- Eliminate excess moisture by repairing leaks and ensuring proper drainage around your home. Carpenter ants are attracted to damp, decaying wood[3].
- Remove wood debris, firewood, or tree stumps near your home and trim branches away from your roof and walls[4].
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Natural and Non-Toxic Methods:
- Pouring boiling water into outdoor nests can kill colonies but must be done carefully[6].
- Essential oils, vinegar sprays, or a mix of baking soda and sugar can help deter or reduce carpenter ant populations, though these are generally less effective for established infestations[6].
- Professional Pest Control: If infestation is severe or nests are inaccessible, contact a certified pest control technician who can use specialized insecticides and methods that are not available to consumers[2][4].
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