And that’s a concern to homeowners who care about trees and tree care professionals that treat trees. The ArborSystems Wedgle Direct-Injection Tree Treatment System is used when they don’t want to do any long-term damage by drilling large holes in the tree. When there are large wounds in a tree, it requires the tree to use up its limited energy to wall them off. Some people have purported to say that the tree will heal over the large hole in a year or two. But nothing is mentioned about the long-term effect from these holes inside of the tree when drilled yearly or semi-yearly. For more information, click here.