There's another product from Ortho ( I believe ) called Ground Clear. I've used it on my mulch beds and along my granite curbing. It is supposed to kill "everything". It has worked wonderfuly for me. It is available at Home Depot. I mix it in a pump type sprayer. It's worth asking about to see if it will take care of your poison ivy problem. One final note: I've used other "week killers" in the past which work something like a tornado (killing one weed while leaving the one next to it completely unaffected
).