That sounds troubling. Something certainly is wrong! The bleeding
shouldn't be a factor. They say it causes no harm and I have no
reason to believe other wise. I always prune mine in the fall
though, because I don't like to see all that sap flowing out.
You mention holes. Do you have grape flea beetles there? This is the
first year I can remember NOT seeing them. Maybe they all went to
your house. I've seen them so bad that they caused some new growth
to turn brown and die. Never the whole vine but I suppose it could
happen.
I don't know of a fungus or other disease that can cause that kind
of trouble, but I'm no expert on grape diseases either. I believe I
could put you in touch with someone who is an expert if you need it.
Damage to the trunk could kill the vine that way but what are the
chances of ALL your vines being damaged all at once? About zero,
that's what. Your vines may save themselves by pushing out growth
later. If they manage to do that, you will get no grapes this year.

Steve

simy1 wrote:

It is June and both my Concord grape stands ( 2 plants one, four
plants another, separated by 300 ft) have not leafed out yet. They
have few shoots and a few leaves that are brown, have many holes, and
have shrivelled. Now due to a series of circumstances I ended up
pruning them in early march, so they bled, and a hard frost in late
april killed whatever was coming up. But the kiwis got the same
treatment, bled much more, and are as rampant as ever. I inspected the
woods and saw less grapevines and some with similar symptoms. It has
to be a disease. Any idea? They have always been strong, healthy
plants.