Scrape a little bark off the end of the branch you think is dead. If the
tissue underneath is moist and green, the branch is still alive. Leave it
alone for a while to see if it comes back. If it's dry, cut the dead part
off. Don't scrape off much bark or you'll cause more trouble.
Sometimes a branch will just spontaneously die. Trees are funny that way.
There's always a reason, but how much time and money do you want to spend
to find out the root cause, especially when the treatment is always to cut
it off to save the rest of the tree.
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