North American Fruit Explorers mailing list at ibiblio

["Christopher Mauchline" <mauch1@aol.com>]

Actually in my experience its more likely to be black rot on 
Concord.  BR on Concord initially looks brownish red (often a cirular 
lesion on part of the grape berry) like they might be ripening.  The 
only part that doesn't match is that you say they rot at the end.  BR 
usually makes black shriveled mummies of the grapes (like raisins, 
but hard).  According to the Penn State's Small Scale Fruit 
Production site:
http://ssfruit.cas.psu.edu/chapter6/chapter6g.htm

Concord has low susceptibility to Downy Mildew and Bunch Rot and is 
very susceptible to Black Rot and Powdery Mildew (although I've never 
seen PM on Concord)

There's a spray schedule at:
http://everest.ento.vt.edu/Fruitfiles/grape-fruit-ipm.html
with listed chemicals effective for BR (click on the Commercial link)

Chris Mauchline
SE PA, zone 6

--- In nafex@egroups.com, "Lon J. Rombough" <lonrom@h...> wrote:
> Sounds rather like downy mildew.  What other (if any) symptoms do 
you see on
> the vine or fruit?  Fungal diseases usually show something more 
than what
> you described.
> -Lon Rombough
> Grapes, unusual fruits, writing, more, at 
http://www.hevanet.com/lonrom
> 
> ----------
> >From: "Jack Wigal" <kr8z@c...>
> >To: <nafex@egroups.com>
> >Subject: [nafex] Rotten Grapes
> >Date: Tue, May 30, 2000, 7:35 PM
> >
> 
> >Fellow Nafexers,   I have several concord grapes which are loaded 
this year.
> >Most years they turn brown (look like they are getting ripe) and 
rot in the
> >summer before ripening. Can someone familiar with this problem 
suggest a
> >good spray to use?
> >
> >Jack Wigal
> >Washington, WV
> >Zone 6
> >
> >
> >
> >-------------------------------------------------------------------
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> >
> >


------------------------------------------------------------------------
Hot off the press- summer's here!
School's out and it's sizzling hot. Whether you're planning a 
graduation party, a summer brunch, or simple birthday party, 
shop GreatEntertaining.com before your next celebration.
http://click.egroups.com/1/4473/0/_/423498/_/959781145/
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