Ortho, 32 oz., Concentrate, GroundClear Poison Ivy/Tough Brush Killer. Kills poison ivy, poison oak, and wild blackberry. Kills over 60 listed tough weeds and brush, including poison ivy, poison oak, and wild blackberry. Fast-acting formula starts working immediately, producing visible results in 1 hour. The herbicide works systemically, killing weeds right down to the root. Apply this herbicide to leafed our and actively growing weeds in non-garden areas around homes, cabins, buildings, fences, and trails. Active ingredients:Triclopyr, Triethylamine Salt: 8.0%