Oak tree ?
We have a oak tree that's approx 40' tall it has started to lose a lot of it small branches I've looked at the leaves and some look Like they haven been eaten on by something . The branches all are breaking off at a knuckle where it's attached to another larger branch. I've seen other oaks aroundiur town doing the same thing . Do not want to lose this tree please help ! Thank you for your time !!
Newton County Missouri trees and shrubs
It sounds like it could be caused from a twig girdler or twig pruner. Without a picture it's hard to tell. See the guide at the link below and see if what is described matches what you are seeing. You may not see these insects, but you will see twigs fall from the tree.