Last winter, my Williams Pride apple tree was girdled at the base, just
below the graft. It has always been a good producer, and gave a good
crop
of apples this year. However, now I see the tree is in distress,
especially at it's top (leaves wilting). I read where one can do a
bridge
graft over the girdled portion. What would be the best time to do that,
and what other advice can be given on this problem?

Sherwin Dubren