Foliar die off starting in the crown/outer foliage.

Lifting of the bark on diseased limbs at limb axis.

There is no evidence of fras, but there are borer holes.
I am wondering whether it is a specie of weevil, due to the lack of any other sign of beastie. There is no foliar damage or malformation, nor is there any bark damage with the exception of the lifting of the bark at the limb bases. Once the problem shows evidence in a tree/shrub, it quickly spreads through out the plant and kills it. We have tried physically removing affected limbs, but to no avail.
This problem has spread to all of the Metro's at work, and today evidence was found of it beginning in the Raphiolepsis indica's.
All help or suggestions would be appreciated.
Thanx all!