North American Fruit Explorers mailing list at ibiblio

[Hilborn.E@epamail.epa.gov]

"Use black locust if you can get them, they are definitely the longest
lasting post without preservative."

Don't forget Osage Orange!

http://www.caes.uga.edu/departments/bae/extension/handbook/documents/wood%20types%20and%20preservation.pdf

BTW- notice that the rot-resistant wood is heartwood.  I learned the
hard way that black locust sapwood rots quite readily.

Betsy Hilborn
7a NC