Posted: 09/09/2014 at 19:19
The dead wood was caused by a previous owner hacking lumps off at random, leaving snags which rotted back. He induced water shoots, which were then not pruned ,and ruined the balance of the tree.
What I'm trying to say is..
Oak trees have grown for a long time. They are very long lived trees. Mine are estimated at 150 years old,and are coming up to their prime. They have tree preservation orders on,and will be touched as little as possible.
They have lots of insects, which cause varying symptoms,none of which have any effect on the long term health of the tree. There are no cracks in the bark with weeping cankers, and no loss of branches in the crown, so I dont think they have either sudden oak or chronic oak decline.
I was trying to reassure the original poster, having a similar drop of twigs with leaves attached, from an otherwise healthy tree.