On Thu, 29 Dec 2011 15:56:25 -0600, Matt
wrote:


They are causing injury to the outer layer of wood (the new growth
ring). They are biting and digging through bark and into healthy wood.
They are not mainly removing rotting wood. The trees are mainly healthy.

Wire cloth / mesh? Sized to order.

They need to chew because of the size of their teeth :\