[NAFEX] apple tree with fireblight

david liezen chandos49 at hotmail.com
Mon Sep 19 14:34:55 EDT 2011


Hi Back,
I am no expert on fire blight, but know that disease pressure increases where trees lack much airflow and direct sun. Your tree just might be in too muck of a squeeze in that way. Also, some cultivars are more vulnerable to fire blight that others. 
Grafting was certainly worth a try. Did you graft to rootstock that has fireblight resistance? I've read (am trying it out, too) that some resistance may be conveyed via the rootstock to the fruiting wood. I've got some Geneva 30 out back (no longer likely to be found on the market due to problems that don't concern me, and appears to be replaced by some verry promising rootstocks) and hope they will help when I graft Edward VII, as well as King David and Summer Rambo. 
Egremont Russet has quite a fan base; worth waiting to see...
Dave Liezen, Spokane, WA z5-6
 

> From: colleendaly at videotron.ca
> To: nafex at lists.ibiblio.org
> Date: Fri, 9 Sep 2011 20:02:15 -0400
> Subject: Re: [NAFEX] apple tree with fireblight
> 
> 
> 
> Hi,
> 
> 
> It certainly looks like "classic" fireblight to me. The variety is Egremont Russet.
> The tree is kind of squeezed in between a Mont-Royal plum and a Pomme Grise apple.
> Would the lack of air circulation contribute to fire-blight?
> 
> 
> Fortunately, I grafted some scions from this tree this spring but now I am wondering if the scions
> could be harbouring the disease or does it not work like that for fire-blight? Also, the tree
> is a poor producer of apples (quantity-wise) so perhaps eradication is the answer. 
> 
> 
> Sincerely,
>                                  Peter Drevniok, Gatineau, QC zone 5
>  
> 
> 
> 
>    
> 
> ----- Original Message -----
> From: "Richard J. Ossolinski" <ossoeo at myfairpoint.net>
> Date: Friday, September 9, 2011 3:20 pm
> Subject: Re: [NAFEX] apple tree with fireblight
> To: North American Fruit Explorers <nafex at lists.ibiblio.org>
> 
> > Peter,
> > Might be worth getting a positive/accurate diagnosis of the 
> > malady prior to taking radical action.
> > Richard
> > Gouldsboro, ME  Zone 5
> > 
> > 
> > On Sep 9, 2011, at 2:07 PM, colleendaly at videotron.ca wrote:
> > 
> > > 
> > > 
> > > 
> > >  Hi,
> > > 
> > > 
> > >          Should 
> > an apple tree (with about 20% of it's growth) affected with what
> > >  looks like fire-blight be removed entirely? Or should I 
> > try to rehabilitate the tree?
> > >  It is an espaliered tree. I do not mind removing it if 
> > it will be a source of disease for my
> > >  other trees.
> > > 
> > > 
> > >                          Sincerely,
> > >                                  Peter Drevniok, Gatineau, QC zone 5
> > > 
> > > 
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