North American Fruit Explorers mailing list at ibiblio

[<dmnorton@royaloakfarmorchard.com>]

Donna,

 

If the leaves are turning yellow and dying, chances are it could be bacterial canker.  it affects both sweet and sour cherries as well as peaches.  I just cut out almost 50 peach trees that did not make it through the winter due to bacterial canker.  it can spread just like fire blight from one tree to the next via leafhoppers, weeds, rain and wind.  i treated our trees with double copper sprays, one in fall after leaf fall and another in spring at bud swell.  Still lost the 50 trees to keep it from spreading to other trees.  There was a definite pattern to the location in the orchard.  Here is some info on bacterial canker in cherry: http://www.caf.wvu.edu/Kearneysville/disease_descriptions/bactcank.html 

 

Mark is probably right about gummosis.  Most stone fruit trees will develop gummosis as a way of protection from invasive sources, i.e. borers, bacterial canker, bark injury, etc.  Gummosis is usually a sign that something is wrong with the tree and it is trying to fight it.  In warm dry spell, it will harden off almost like a Band-Aid and protect the tree.  I have seen gummosis callous over and the tree becomes just fine.  But if it continues to ooze and does not stop, it is usually a sing of a more severe problem.  Hope this helps!

 

By the way, I will be gone for about a week, (our calm before the storm when our season opens July 7) so if anyone tries to contact me, I will get back to you around July 6.

 

Dennis Norton
Royal Oak Farm Orchard
http://www.royaloakfarmorchard.com
http://www.theorchardkeeper.blogspot.com
http://www.revivalhymn.com

----- Original Message -----

From: Mark & Helen Angermayer

To: North American Fruit Explorers

Sent: Thursday, June 28, 2007 11:01 AM

Subject: Re: [NAFEX] Cherry twig problems

Donna,

 

Are you sure it's not cherry gummosis?  I know it affects sweet cherries mostly, but I've heard it can affect tart cherries too.

 

Mark

Kansas

----- Original Message -----

From: Donna

To: North American Fruit Explorers

Sent: Wednesday, June 27, 2007 11:05 PM

Subject: Re: [NAFEX] Cherry twig problems

I bought a sour cherry to pollinate my Duke that blooms so much later than the sweet cherries near it.  With the drought I didn't think it was so unusual that the leaves on a few small branches turned yellow and died.  But then a few more, and a few more till I had a good look at it.  The trunk is an inch in diameter at the base, and about a foot up there is a glob of sap, looks like some kind of borer at work.  What do I do now?  The wire like for a peach tree borer?     Donna  

---

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