North American Fruit Explorers mailing list at ibiblio

["Charles Rhora" <rhoras@nuttrees.com>]

Jerry,

Good question!

I know that in some instances (small percentage) it may have been caused by
the rootstock not being winter hardy, in other cases the rootstock was not
affected.
>From my notes (this test winter was approximately 15 years ago, in saying
this though, who knows when the next test winter will come?) 
It was for this reason that I have not planted another grafted tree since.
As a member of NNGA for a long time (more than 40 years) I always follow the
write ups and papers presented to glean more knowledge from others
prospective.  In other words, I am aware of the problem as presented for
chestnuts.
I also have the three distinct varieties of chestnuts (American, Chinese, &
Japanese) and as mentioned have found they are more easily propagated by
selecting the 1/ disease resistance 2/ larger size nut 3/ taste for seed
planting for selections.

Charles.



-----Original Message-----
From: nafex-bounces@lists.ibiblio.org
[mailto:nafex-bounces@lists.ibiblio.org] On Behalf Of Jwlehman@aol.com
Sent: Friday, November 23, 2012 10:09 AM
To: nafex@lists.ibiblio.org
Subject: Re: [nafex] Charles argument- advantage of seedling nut trees

In a message dated 11/22/2012 5:09:35 PM Eastern Standard Time,
rhoras@nuttrees.com writes:

> The point is, that, in this test winter that I referred to,  the 
> grafted trees were not on their own roots. The seedlings were on their 
> own roots and survived and are still producing.

Charles,

Is the reason the grafted trees died due to lessor winter survivability of
the rootstock (less winter hardy understock) or the act of having been
grafted? 

I have grafted several hundred persimmon (D. virginiana) and our temps
sometimes drop to -15 and I have seen no greater die back on the grafted
trees. 
I've not had a problem with die back on grafted nut trees. 

May I submit your conclusion of dying due to grafting may be prejudices 
against grafting when the real reason is weak understock?   

Incompatibility in chestnuts is a real problem. Dr. Sandra Anagnostakis has
researched and published that. But the die back isn't due to the act of
grafting, rather grafting of two distinctive incompatible types. 

Jerry
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