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  • From: "Christopher Mauchline" <>
  • To:
  • Subject: [nafex] Re: Rotten Grapes
  • Date: Wed, 31 May 2000 13:51:29 -0000

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:

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:
with listed chemicals effective for BR (click on the Commercial link)

Chris Mauchline
SE PA, zone 6

--- In, "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
> ----------
> >From: "Jack Wigal" <kr8z@c...>
> >To: <>
> >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
> >
> >
> >
> >-------------------------------------------------------------------
> >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 before your next celebration.
> >
> >-------------------------------------------------------------------
> >
> >
> >

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 before your next celebration.

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