my cabernet franc vines are doing well, but the bunches on one of my vines
are showing signs of deterioration.

I've posted a photo of the grapes at www.africusrex.com/temp

can anyone identify the malady?

Jeff

could it be grape anthracnose?

Jeff

"jeff" wrote in message
...
my cabernet franc vines are doing well, but the bunches on one of my vines
are showing signs of deterioration.

I've posted a photo of the grapes at www.africusrex.com/temp

can anyone identify the malady?

Jeff

Hi....yes I would agree..also known as Birds Eye Rot..I've had this
before ...even this year on a few bunches,although it doesn't seem to
be progressing on my vines after hitting them with a captan formulation
and then Benomyl....andy j.

jeff wrote:

my cabernet franc vines are doing well, but the bunches on one of my vines
are showing signs of deterioration.

I've posted a photo of the grapes at www.africusrex.com/temp

can anyone identify the malady?

Jeff

Jeff, I have noticed the same thing on a very few of my berries.
In looking at the "Midwest Small Fruit Pest Management Handbook" published
by the Ohio State University Extension I found a picture on page 128 that
looks exactly like what you show and what I have observed. The source of
the problem is Powdery Mildew. It is interesting that I have not observed
the PM on the leaves - just a few berries. Other growers in the area are
experiencing a LOT of problems with Powdery Mildew this year. Hope this
helps.

"Paul E. Lehmann" wrote in message
...
jeff wrote:

my cabernet franc vines are doing well, but the bunches on one of my
vines
are showing signs of deterioration.

I've posted a photo of the grapes at www.africusrex.com/temp

can anyone identify the malady?

Jeff

Jeff, I have noticed the same thing on a very few of my berries.
In looking at the "Midwest Small Fruit Pest Management Handbook" published
by the Ohio State University Extension I found a picture on page 128 that
looks exactly like what you show and what I have observed. The source of
the problem is Powdery Mildew. It is interesting that I have not observed
the PM on the leaves - just a few berries. Other growers in the area are
experiencing a LOT of problems with Powdery Mildew this year. Hope this
helps.

Paul,

how strange, I am not getting it on the leaves eather. I thought maybe i
wasn't getting it at all this year due to extreme heat, etc. this is the
first time I've seen no PM on leaves. if you hear of anything else, let me
know.

thanks

Jeff

jeff wrote:


"Paul E. Lehmann" wrote in message
...
jeff wrote:

my cabernet franc vines are doing well, but the bunches on one of my
vines
are showing signs of deterioration.

I've posted a photo of the grapes at www.africusrex.com/temp

can anyone identify the malady?

Jeff

Jeff, I have noticed the same thing on a very few of my berries.
In looking at the "Midwest Small Fruit Pest Management Handbook"
published by the Ohio State University Extension I found a picture on
page 128 that
looks exactly like what you show and what I have observed. The source of
the problem is Powdery Mildew. It is interesting that I have not
observed
the PM on the leaves - just a few berries. Other growers in the area are
experiencing a LOT of problems with Powdery Mildew this year. Hope this
helps.

Paul,

how strange, I am not getting it on the leaves eather. I thought maybe i
wasn't getting it at all this year due to extreme heat, etc. this is the
first time I've seen no PM on leaves. if you hear of anything else, let me
know.

thanks

Jeff

Jeff, I know it is real weird. Another commercial grower less than 10 miles
from me is experiencing the very same thing - split berries that look a lot
like powdery mildew but no infection on the leaves. Other growers nearby
are experiencing powdery on BOTH leaves and berries. I have started
spraying with Tenncop which is a copper base fungicide and supposedly is
good for both powdery and downy. This has been a good year up to now but
now I have doubts about the future of the harvest. BTW - I live in Central
Maryland.

Here is another link showing pictures of the major grape diseases. Note the
picture for Powdery and the split berries.

http://lenewa.netsync.net/PUBLIC/IPM/Pest_List.htm

Let me know if you find out any more information.

Paul

"Paul E. Lehmann" wrote in message
...
jeff wrote:


"Paul E. Lehmann" wrote in message
...
jeff wrote:

my cabernet franc vines are doing well, but the bunches on one of my
vines
are showing signs of deterioration.

I've posted a photo of the grapes at www.africusrex.com/temp

can anyone identify the malady?

Jeff

Jeff, I have noticed the same thing on a very few of my berries.
In looking at the "Midwest Small Fruit Pest Management Handbook"
published by the Ohio State University Extension I found a picture on
page 128 that
looks exactly like what you show and what I have observed. The source
of
the problem is Powdery Mildew. It is interesting that I have not
observed
the PM on the leaves - just a few berries. Other growers in the area
are
experiencing a LOT of problems with Powdery Mildew this year. Hope this
helps.

Paul,

how strange, I am not getting it on the leaves eather. I thought maybe i
wasn't getting it at all this year due to extreme heat, etc. this is the
first time I've seen no PM on leaves. if you hear of anything else, let
me
know.

thanks

Jeff

Jeff, I know it is real weird. Another commercial grower less than 10
miles
from me is experiencing the very same thing - split berries that look a
lot
like powdery mildew but no infection on the leaves. Other growers nearby
are experiencing powdery on BOTH leaves and berries. I have started
spraying with Tenncop which is a copper base fungicide and supposedly is
good for both powdery and downy. This has been a good year up to now but
now I have doubts about the future of the harvest. BTW - I live in
Central
Maryland.

Here is another link showing pictures of the major grape diseases. Note
the
picture for Powdery and the split berries.

http://lenewa.netsync.net/PUBLIC/IPM/Pest_List.htm

Let me know if you find out any more information.

Paul

Paul,

I did some browsing and found the following site PM. You may have seen
it yourself already in your research, but here is the link:
http://ohioline.osu.edu/hyg-fact/3000/3018.html There's a few photos with it
as well, similar to what I'm experiencing and the link photos you posted.

Jeff