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  • From: "Dennis Norton" <dmnorton@royaloakfarmorchard.com>
  • To: "North American Fruit Explorers" <nafex@lists.ibiblio.org>
  • Subject: Re: [NAFEX] What is this on this peach tree?
  • Date: Wed, 31 May 2006 14:05:04 -0500

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.








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