One application BioAdvanced Brush Killer Plus kills poison ivy, poison oak, kudzu and other tough brush problems down to the roots. This systemic herbicide enters plants through their leaves, green or cut woody shoots, and roots then moves throughout the plant and interferes with processes found only in plants. The application is rainproof in 4 hours and visual symptoms, such as wilting and yellowing, appear in 1 to 6 weeks. Use around homes, cabins, buildings, fences, walkways, trails and wooded areas when brush is leafed out. To kill freshly cut stumps, completely cover stump with undiluted product using a paintbrush. Do not reuse paintbrush for other uses. When discarding, wrap brush in newspaper and put in trash. Active Ingredients: Triclopyr, triethylamine salt: 0.8%. BioAdvanced Brush Killer Plus, Liquid Concentrate, 32 oz, Herbicide * Special formula: Special penetrating formula, kills even the toughest plants down to the root * Brush killer: Kills kudzu, poison ivy, poison oak, blackberry, bramble and over 70 other types of weeds and brush * Results: Start seeing visual results in 1 to 6 weeks * Rainproof protection: rainproof in 4 hours * Kills Stumps