hoosierdoc
Freed prisoner
the only place that uses Vitus Vinifera roots, that I am aware of, is Chile and they have serious vehicle searches as you move from one area to another to prevent the possible spread of phylloxera.
here is the real reason they are on "American root stock" Phylloxera - Wikipedia, the free encyclopedia
did you read my link? same story. I said aphid when it's a cousin of aphids though.
I just like to tweak the French due to their wine industry surviving because of American roots. Was a tough pill for them to swallow.