North American Fruit Explorers mailing list at ibiblio

["Dennis Norton" <dmnorton@royaloakfarmorchard.com>]

Hello Mark!

Looks like you have some leaf curl on the leaves of your peach tree and the 
trunk has canker.  A dormant copper spray will take care of the leaf curl 
and will assist with the canker, but there are several different types of 
canker that attacks peach trees:
Cytospora Canker of perennial canker
Fusicoccum Canker
Leucostoma Canker
Bacterial Canker, the worst of them all.

Yours, since it is traveling vertically up the trunk, fits the description 
of perennial and is the simplest to take care of.  Rather than explain how 
to deal with this form of canker here, go to 
http://www.ag.uiuc.edu/~vista/abstracts/a806.html for the canker and to 
http://www.caf.wvu.edu/kearneysville/wvufarm8b.html#PEACH for the peach leaf 
curl and you will find the most complete guide to peach tree diseases on the 
internet and the control of each complete with photos.  I use these sites 
almost extensively when combating the many diseases that attack peach trees.

Out of about 1100 peach trees, I am currently dealing with the same type of 
canker here (Zone 5 northern Illinois) on about 20 trees.  We are 
approaching the optimum time of the season to deal with perennial canker 
since it is best to surgically remove it once we have reached about 190 DD 
(degree days) mid-June to early July) since that is the optimum healing 
period for peach trees in our zone.  They heal faster then than at any other 
time.

Hope this helps.

Dennis Norton
Royal Oak Farm Orchard
http://www.royaloakfarmorchard.com
http://www.theorchardkeeper.blogspot.com
----- Original Message ----- 
From: "Mark or Helen Angermayer" <hangermayer@isp.com>
To: "North American Fruit Explorers" <nafex@lists.ibiblio.org>
Sent: Tuesday, May 30, 2006 11:14 AM
Subject: [NAFEX] What is this on this peach tree?


> Hi,
> I wonder if someone could tell me what's wrong with this peach tree.  It 
> is
> a "White Princess" peach I've had for about 3 years. There is a red growth
> on some of the leaves.  Can you tell from the pictures if it is bacterial 
> or
> fungal?  Also, I don't know if it's related, but there are some vertical
> lines in the trunk  that exude gum.  This spring I noticed some loose bark
> and cut it away and found these vertical lines partially healed.  I 
> sprayed
> this tree with copper last winter.
>
> Here are the photos:
> http://www.nafex.org/uploads/p1010044.jpg  60K
> http://www.nafex.org/uploads/p1010043.jpg  185K
> http://www.nafex.org/uploads/p1010045.jpg  58K
>
>
> Thanks,
> Mark Angermayer
> Zone 5 Kansas
>
> P.S. My apologies to the Nafex webmaster.  I didn't understand how to
> properly label these photos.