[NAFEX] Fwd: Can you identify this?

Lon J. Rombough lonrom at hevanet.com
Thu May 31 09:08:35 EDT 2007

When these sorts of mites affect grapes, as Dr. Dahl says, they only 
cause cosmetic damage and can be ignored.  Usually native predator 
mites build up and control them, or if the vines are treated for 
powdery mildew, the sulfur used as a mildew control also kills the 
-Lon Rombough
Grapes, writing, consulting, my book, The Grape Grower, at 
http://www.bunchgrapes.com  Winner of the Garden Writers Association 
"Best Talent in Writing" award for 2003.
For even more grape lessons, go to  http://www.grapeschool.com
For growing supplies and more;  http://www.grapegrowersolutions.com

On May 31, 2007, at 5:56 AM, mIEKAL aND wrote:

In reference to the thread circulating the last few days, I sent photos 
of the red & green spikey growths on the leaves of my beach plums.  (& 
from Shirley's description, I believe this is what is on her grapes.)


Begin forwarded message:

> From: "Dahl, Robert A - DATCP" <Robert.Dahl at datcp.state.wi.us>
> Date: May 31, 2007 7:34:38 AM CDT
> To: "mIEKAL aND" <dtv at mwt.net>
> Subject: RE: Can you identify this?
> Those are eriophyid mite galls. They are only cosmetic and don't affect
> fruit production. Not much to be done about them as they are cyclical 
> in
> populations. You don't know from year to year whether they will be
> prolific. Just enjoy the red galls they make, they are kind of
> beautiful.
> Robert Dahl
> Chief, Plant Protection
> Wisconsin Department of Agriculture, Trade & Consumer Protection
> PO Box 8911
> Madison, WI 53718
> Phone: 608.224.4573
> Fax: 608.224.4656
> Email: robert.dahl at wisconsin.gov
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