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BioAdvanced Poison Ivy Killer Plus Ready-to-Use kills hard-to-control poison ivy and other listed brush and vine weeds, including poison oak, blackberry, kudzu, and more. Its systemic formula works through the leaves and stems, moving down into the root system to kill the entire plant. Poison Ivy Killer Plus kills brush and vines slowly so weeds won't grow back. Lasting results will be seen over the following weeks as the roots break down and growth collapses. While it works, the formula targets plants below the surface, handling the toughest part of the job. Designed for ease and convenience, the ready-to-use 1-gallon container features a built-in sprayer, making it simple to treat individual vines or larger areas without extra equipment. Just spray until leaves are fully wet and let the formula do the rest. Ideal for tackling unwanted listed brush and vines around your outdoor space, it's a straightforward and effective solution for reclaiming your landscape. BioAdvanced. Get More From The Blue Bottle. Active ingredient: Triclopyr, triethylamine salt 0.8%. EPA Registration Number: 92564-8.