North American Fruit Explorers mailing list at ibiblio

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

Hans raised the issue of rootstocks other than 
pecan(C.illinoensis)  requiring a compatible interstem.  It's 
well-known - or, at least, anecdotally reported - that some pecan and 
hickory selections are not graft-compatible with either bitternut 
hickory(C.cordiformis) or bitter pecan(C.aquatica), and if a nursery 
were using either of these two species as rootstocks, then an 
interstem graft of, say, "Green River" pecan on bitternut would be required.
But, I find it unlikely that many commercial pecan nurseries in The 
South would be using anything other than pecan seedlings as their rootstock.

Lucky