North American Fruit Explorers mailing list at ibiblio

[R F Hollaus <hollaus@comcast.net>]

 >I've scoured the web and elsewhere looking for info about 
 >hawthorn as a pear rootstock and have found little beyond 
 >casual mention that it can work.

Devin, 

It's always an interesting subject isn't it. :)

It has been observed before under pear in Oregon some time ago 
so it seems possible to have lasting effects as I have seen 
results using the 'old home' as the interstem for trees about 
25 years old still. 

See: 
http://horticulture.oregonstate.edu/system/files/ond100203a.pdf

Another example of pear with other things: 
http://root2fruit.org/pdf/PEARwhitepaper.pdf

This last article in table 1 estimates takes with hawthorne to 
pear as poor to good so good luck and maybe in ten years you 
can copy back to us some day how it all went. 

Rupert.