1 Gallon, GroundClear Poison Ivy/Brush Killer. Controls over 60 types of weeds and brush, including poison ivy, poison oak, and wild blackberry. Fast-acting formula starts working immediately, producing visible results in 1 hour. This herbicide works systemically, kills weeds right down to the root. Apply this herbicide to leafed out and actively growing weeds in non-garden areas and homes, cabins, buildings, fences, and trails. Active Ingredients:Triclopyr, triethylamine salt: 0.07%