"Don Phillipson" wrote in message
...
"Matt" wrote in message
...

I have a couple of big silver maples, 40 years old and about three feet in
diameter. . . .
What is the best way to stop the damage and make the trees live longer?

If your trees have grown to 3 ft. diameter in 40 years, they seem
so exceptioally vigorous you need do nothing to make them live longer.

--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)

I like two 220v, (440 where available) bare copper 3/0 wires running up the
trees, one inch apart. Slathered, of course with peanut butter, or sprayed
with peanut oil.

This minimizes the damage from squirrels.

Steve