We contacted The Tree Doctor, Dayton Archer, after our oaks were dx w oak wilt. He came out, assessed the situation, gave us his opinions on which trees to concentrate on, gave us a fair quote, and came back a few days later to treat our trees. The treatment involved clearing the main roots of a lot of ground cover, drilling into the roots, and connecting injection tubes containing a fungicide. Our massive oak took all day and he still wasn't satisfied enough had gone in, so he left the injectors in overnight and came back the next day. Although these treatments have no guarantee that they will work, it's all there is against oak wilt and we feel confident that if anyone could prevent them from getting oak wilt, he could. He is a certified arborist and certified oak wilt specialist listed on the Texas Forest Service website. Very thorough and informative. read more