I have been battling a wild riverbank grapvine for the last couple of years only to fail miserably. it is taking over and choking my rhubarb out and growing into our asparagus bed and strawberry. I don't know how to get rid of this headache. I was reading that they produce grapes but i have never seen grapes on this thing. Does anyone have ideas on how to get rid of this evasive plant?