Nancy,
I think the first thing you need to do is rule out normal fall needle drop.
There is a brief available at:
http://www.ext.nodak.edu/county/stark/spotlite/needledrop.h
tm
If this isn't the case, I don't think digital photos will do much good. You
need to be able to carefully examine the affected branches with brown
needles, probably with a stereoscope or microscope to check for insects or
pathogens. The plant disease clinic does this for a fee. Information can be
obtained about sample submission at:
http://www.extension.umn.edu/distribution/cropsystems/D
C3170.html
HTH,
Janna
On 12/1/04 2:12 PM, "white156@umn.edu" <white156@umn.edu> wrote:
> A woman brought in two samples taken from two different pine trees in
> her home's windbreak. One sample's needles have all turned a deep
> brown color. Some needles on the other sample have a variegated
> brown look to them, while others are still green. The woman said the
> pine trees are about 20 years old and she just recently noticed that
> some appear to be dying.
>
> I asked her if the trees appeared to be dying top/down, bottom/up,
> inside branches/out, outwards/in, etc. She is not sure. There hasn't
> been any construction or disturbance to the soil around them to
> interfere with their roots.
>
> Would anyone be willing to look at some digital photos of the samples?
> Or, does anyone have suggestions for resources I can pass on to this
> woman to help her get her tree problem diagnosed?
>
>
>
> Nancy White, Office Mgr.
> Stevens Co. Extension
> 400 Colorado Ave
> PO Box 269
> Morris, MN 56267
> Phone: (320) 589-7423
> Fax: (320) 589-7440
> E-mail: white156@umn.edu
>
> mastgar archives:
> http://lists.extension.umn.edu/pipermail/mastgar/
> Mastgar mailing list
> Mastgar@extension.umn.edu
> http://lists.extension.umn.edu/mailman/listinfo/mastgar
>
--
Janna Beckerman, Ph. D.
Extension Plant Pathologist and Assistant Professor
University of Minnesota
495 Borlaug Hall
1991 Upper Buford Circle
St. Paul, MN 55108
Phone: (612)625-7022 Fax: (612)625-9728
email: janna@umn.edu
"Il faut cultiver notre jardin." Voltaire
