[NAFEX] Raspberries blackberries

Michael Dossett phainopepla at yahoo.com
Wed Feb 2 02:52:59 EST 2011

Red raspberries and blackberries can carry viruses asymptomatically that severely affect black raspberries.  The distance is to help stop spread which can be either by pollen or by aphids depending on the virus.  For whatever reason, black raspberries seem to be extra-sensitive to these viruses that are less of a problem for the other berries.  As a result, black raspberries have become the standard for graft testing for viruses from red raspberry and blackberry, because they show the symptoms quickly.  On the flip side of the coin, black raspberries have shrunk from being a much larger industry in this country than red raspberries because growers have such problems with disease.

We've made great strides the last few years in discovering new sources of aphid and disease resistance in black raspberry germplasm and I'm very optimistic that new varieties with improved planting life and vigor will be available to people in the not too distant future.


Michael Dossett
Corvallis, Oregon
phainopepla at yahoo.com

--- On Tue, 2/1/11, Melissa Kacalanos <mijwiz at yahoo.com> wrote:

> From: Melissa Kacalanos <mijwiz at yahoo.com>
> Subject: Re: [NAFEX] Raspberries blackberries
> To: "North American Fruit Explorers" <nafex at lists.ibiblio.org>
> Date: Tuesday, February 1, 2011, 3:17 PM
> I've read that this is because black
> raspberries can host viruses that don't really bother the
> black raspberries themselves, but can be harmful to the
> other kinds if they spread to them. And vice-versa. The
> viruses spread by aphids.
> In my cynical view, I don't think keeping the different
> kids of berries 100 feet apart would do much good at
> stopping viruses from spreading. There are lots of wild
> black raspberries in my woods, but the red and purple
> raspberries I planted 2 years ago seem to be doing fine.
> Your mileage may vary.
> Melissa
> --- On Tue, 2/1/11, Hilborn.E at epamail.epa.gov
> <Hilborn.E at epamail.epa.gov>
> wrote:
> > From: Hilborn.E at epamail.epa.gov
> <Hilborn.E at epamail.epa.gov>
> > Subject: [NAFEX] Raspberries blackberries
> > To: "North American Fruit Explorers" <nafex at lists.ibiblio.org>
> > Date: Tuesday, February 1, 2011, 12:17 PM
> > I am planning to plant some bramble
> > berries this year and ran across
> > this statement at Stark Bros: "Red, Gold and Purple
> > Raspberries and
> > Blackberries should not be planted within 75 to 100
> feet of
> > Black
> > Raspberries."
> > 
> > Does anyone know why they suggest this?  Is it a
> > problem in all areas of
> > the US?
> > 
> > We have lots of naturalized blackberries here in
> central
> > NC. I wonder if
> > anyone successfully grows black raspberries here.
> > 
> > Betsy Hilborn
> > 7a NC
> > 
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