Need to kill Forsythia bush.?

I have used a whole can of Ortho Brush-Be-Gone and this stupid Forsythia bush will not die! It is up against a fence and weaving into it like a vine as it grows so having it dug out is not an option. Is there any other commercial plant killer or method that anyone could suggest?

Need to kill Forsythia bush.?
Try lime - cut it out as much as possible and chemically burn the rest by pouring a small pile of lime on it. If that fails, dig it out further and try some lye (Drain-o). Put a layer of dirt over it in either case to keep animals and children away until that lye or lime dissipates a little. Mark the area and warn people off it. Watch out, though, it can also corrode the fence, so keep it on the root area of the plant.
Reply:If you can't rip it out of the groud, I suggest cutting it completly off and submerge it in weed barrier and moss..





good luck!
Reply:HAVE YOU TRIED BLEACH, MY FATHER KILLS EVERYTHING WITH IT.

my horses