RIck.. we have had some success with cover and smother. Best material from our own experience is old sheet metal roofing, especially if the PI is a sunny area. The heat will eventually ( two years or so) bake the plants and knock back the root system so you can grub out the remaining roots.
We covered the sheet metal with mulch hay in areas where it was near our flower garden so it didn't look so tacky,
--- On Mon, 2/23/09, Rick Speer <[log in to unmask]> wrote:
From: Rick Speer <[log in to unmask]>
Subject: Poison ivy
To: [log in to unmask]
Date: Monday, February 23, 2009, 2:39 PM
A co-worker of mine is looking for ways to eliminate a large patch of poison
ivy around her house and is looking for ideas that would not impact the
ground water or the spring near her house from which they get their water.
(I'm not sure what the current thinking is about the environmentaly impact
of Roundup---but, she is reluctant to use that anyways.)
Any suggestions would be greatly appreciated.