North American Fruit Explorers mailing list at ibiblio

[Anton Callaway <marillen@earthlink.net>]

My memory of the performance of pears on Provence quince were a little 
off.  After checking my orchard notes, I found that I've had several 
pears die of fireblight on Provence quince and the whole thing, 
including the stock was killed.  The following numbers shouldn't be 
taken very seriously, 'cause it was not a controlled experiment.  There 
were several different scion varieties on each type of stock and the 
scions were not replicated on each stock for starters.  Anyway, FWIW:

Stock                          Percent killed by fireblight (scion 
killed completely)

Angers quince:  43%
Provence quince:  83%
OHxF 51:  40%
P. callyerana:  25%

These trees were all grown in Zone7 in N. GA.  There are few places with 
higher blight pressure.

Anton