Termites that attack living trees are called Formosan subterranean termites. They enter the tree at its base and eat their way through the inside from the ground up. If you've recently spotted signs of termite activity around one of your trees, don't panic! In most cases, you can save the tree and get rid of the termites within a few days. In this article, we'll walk you through a variety of options—both natural and chemical—for treating a tree infestation.