North American Fruit Explorers mailing list at ibiblio

[Lucky Pittman <lucky.pittman@murraystate.edu>]

There is a Cooperative Extension Service bulletin entitled  "Renovating 
Old, Abandoned Apple Trees", which addresses proper pruning & management of 
old, overgrown fruit trees.  Your county CES office should have it, or be 
able to get it, or you can order it online from MU.

http://muextension.missouri.edu/explore/regpubs/ncr429.htm

Lucky Pittman
USDA Zone 6
Hopkinsville, KY