Fruits and Nuts: bumps on my grape leaves.., 1 by GordonHawk

GordonHawk wrote:
in doing a new roof top garden for a friend we rescued an abandoned grape vine from a planter on the next roof space... gave it new soil and gave it water ... The grape took off with responce to the care ... but now on the leaves there are bumps... places all over many of the leaves a blister looking bump on the top of the leaf.. and on the reverse a domed area and filled with like a white fuzzyness that can't really be scraped off... is this insect or a fungal item.... I think it's a white grape.. OH .. and what should I do to rid myself of it... Thanks Gordon