How to Treat Trees and Stumps for Termites
TREE STUMPS
Drill holes in the top of the stump that are about 1/2 inch wide and just as deep as you can make them. You should try to drill them at least 12 inches deep. Ideally, you should drill them about every 4 inches apart, but if that is too much work, just drill as many as you can. The more of them you drill the better. Also drill holes that are about 12 inches apart around the base of the stump that are on a downward angle, so that the drill bit is aiming under and to the center of the stump. After the holes are all drilled, then mix Taurus SC at 0.8 oz per gallon and fill up the holes with it. You can mix it in a bucket and use a funnel to get it into the holes. It's a good idea to put a cork in the stump holes or fill them in with some sort of caulking to keep the rain out of the holes. If the holes are sealed to prevent light and rain from entering, the Taurus SC can last several years. The hope is that termites will find their way into the areas you treated and take the Taurus SC back to the colony and share it with the other termites. Then it's lights out for the entire colony. Sooner or later, they will come in contact with the Taurus SC. They don't know that this is harmful, so they will happily pass right through it and eat wood that is contaminated with it.
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TREES THAT ARE ALIVE
This is something of a Hair Mary Pass, but you can try drilling holes that are about 12 inches apart around the base of the tree that are on a downward angle, so that the drill bit is aiming under and to the center of the tree. You want to use a drill bit that is at least 12 inches long and at least 1/2 inch wide. The longer the better. After the holes are all drilled, then mix Taurus SC at 0.8 oz per gallon and fill up the holes with it. You can mix it in a bucket and use a funnel to get it into the holes. You can also drill some holes down into the ground at a 90-degree angle, that are about 6 inches apart and fill them up with the Taurus SC as well.
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DEAD TREES
Drill holes that are about 12 inches apart around the base of the tree that are on a downward angle, so that the drill bit is aiming under and to the center of the tree. You want to use a drill bit that is at least 12 inches long and at least 1/2 inch wide. The longer the better. Also drill holes right into the tree, a couple of inches above the dirt. You want them about 6 inches apart around the entire tree. Drill these holes in a downward angle toward the center of the tree. After the holes are all drilled, then mix Taurus SC at 0.8 oz per gallon and fill up the holes with it. You can mix it in a bucket and use a funnel to get it into the holes. You can also drill some holes down into the ground at a 90-degree angle, that are about 6 inches apart and fill them up with the Taurus SC as well. There is a good chance that the termites will contact the Taurus SC and bring it back to the colony and share it with the other termites. This will kill the entire colony. If the colony is dead, then the termites will not be alive to attack your house. After the colony is dead, then remove the tree.
Taurus SC: https://www.domyown.com/taurus-sc-termiticide-p-1816.html?sub_id=1817