What gives BioAdvanced Extended Control Brush Killer its name is the full year of control, 365 days, against tough brush such as Poison Ivy, Poison Oak, Kudzu, Blackberry and other listed brush. This selective systemic herbicide kills down to the root, with visible results in minutes; and visual symptoms such as wilting and yellowing appearing in 1 to 28 days. You will enjoy 12 months of protection. This 32 oz concentrate covers 4,000 square feet and can also be used to kill Stumps. Use around homes and buildings, fences, walkways, trails, wooded areas and more. Active Ingredient: 8.8% Triclopyr, triethylamine salt. EPA Registration Number: 92564-80. BioAdvanced. Get More From the Blue Bottle.