no one knows?

Hello,
I'm in Texas so this may not be relivant but I have a question. Why are you using usseriensis and not calleryana? At least here in CTex and also in East Texas(and most of the southeast for that matter) Calleryana is the stock of choice. I have not heard of problems with pear decline around here and for that matter I have not heard of anyone in the south using usseriensis. That is not to say no one does and maybe someone will chime in. I have a good deal of experience with pears and I would bet you would do well with pcall. But hey maybe try some on usseriensis also and see which one perfoms best.

Hope that helps,
Scape

I have lots of p calleryana to graft to just bought a few p usseriensis to try and see because of the great resistance to fire blight.

Thats cool. I have found out along with alot of other people that sometimes you have to try something yourself to learn about it because chances are you may be the only one who has tried it yet in your area. Especially with pears in the south. Let me know how they do for you if you can.

Thanks,
Scaper