who has experience with this obnoxious and painful weed? I got advice from the local garden center to cut it all the way back and then treat it with full strength brush be gone. I am afraid that I will have to spend many hours cutting it all back. We started on it last year and spent an hour and a half today on it. It is scarey stuff, for sure. I wouldn't be so afraid, but our property only goes about ten feet into the woods and the greenbriar is at least 20 feet. I want to just spray it all and have it go away. I sprayed it with Roundup a few times last year, but doesn't seem to have made a difference, it still looks like the stems are green. Dang.