On Fri, 20 Mar 2009 15:32:40 -0500, "D. Staples"
wrote:

Walter wrote:
A glorious 70 foot tall White Pine has become sick over the winter with
all its needles turning brown. It is located on an island in Georgian
Bay, Ontario, Canada and is well removed from civilization, salt, etc..
No other trees on the island - or the area for that matter - display
this condition.

Is this the work of a pine beetle? If yes, what to do? If not, what has
caused this and is there hope?




Not enough information to tell, but, pine bark beetles leave sign on the
bark, and under the bark. Knowing a little of the history of the crown
might help. Did it turn red limb by limb, or all of a sudden? Any
lightning strike evidence on the tree? Wind throw? Anything?


What about lake water levels ?
Could the low lake levels, over the past several years,
have stressed it ?
A local conservation authority might be a better source
of information - they might even send out a tree-person
to have a look.
John T