North American Fruit Explorers mailing list at ibiblio

[<dmnorton@royaloakfarmorchard.com>]

Mark,

 

There also looks like there is some frass from dogwood borer in the cankers.  If you dig around in the canker and see some canals that looks like termites have been in the canker, chances are there are borer larvae in there at this time of the season.  We are getting ready to do our lorsban trunk spray on the burr knots of our mark and M26 rootstock trees that borers love to lay eggs in.  it is time for those eggs to hatch and the larvae should be active now.  it's usually the end of June or first of July when they are at work.

 

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: Saturday, June 23, 2007 10:59 PM

Subject: [NAFEX] Help identifying apple disease

 

One of my neighbors has a couple of diseased apple trees that have severe cankers all over.  They've had these cankers for many years, but the trees continue to survive.  Both trees produce fruit.  I have never seen the typical fireblight symptoms of black shepherd crook twigs, but there are small mummified black fruits left over from last season on at least one of the trees.  Additionally, one of the trees shows symptoms of CAR on the foliage, but the other shows no CAR.  As far as I can tell there doesn't seem to be any major scab going on.  Except for the CAR on the one tree, the leaves look fairly clean.  Any ideas what may be producing these ugly cankers?  Oh, by the way, there is a third apple tree right in the middle of the diseased ones that doesn't have any cankers.

 

Here are some photos:

 

http://www.nafex.org/uploads/apple%20canker1.jpg

 

http://www.nafex.org/uploads/apple%20canker2.jpg

 

http://www.nafex.org/uploads/apple%20canker3.jpg

 

Thanks,

Mark

Zone 5 Kansas