Locate The Nest
The first thing you need to do is locate the nest. Carpenter ants generally live together in colonies and build nests where they all live together. They like to locate the rests inside of either soft or rotting wood. They tend to take advantage of trees that are diseased or have sections of soft or rotting wood and make their nests inside of these trees.
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Carpenter ants tend to move around the most during the evening hours, especially in the summer and spring when they are the most active. Take a flashlight outside and put some red cellophane over the light. Ants can’t see the color red, which is why you should put re cellophane over the light; it will allow you to see the ants without altering them to your presence.
Shine your light around the base and trunk of your tree. You should be able to see a trail of carpenter ants going into their nest. If you don’t cover your flashlight, you could disturb the ants and cause them to flee to a new home.
Block The Nest Entrance
Now that you have located the nest entrance, you need to block it off. Purchase some insecticide that comes in a dust form and contains either retenone or carbaryl. You will also need to wear protective gloves and goggles when handling this material. You’ll want to put the dust insecticide into bottle with a small tip to help you apply it. Squeeze this insecticide into the entrance to the ants home. The insecticide will kill the ants inside of the nest and any ants that return to the nest. It should also help block ants from getting back into your tree.
If it rains, you may want to re-block the nest again and check at night to make sure that there are no longer any carpenter ants hanging around you oak trees.
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