Use Ortho GroundClear Poison Ivy & Tough Brush Killer1 to kill poison ivy, poison oak, and wild blackberry. Also kills honeysuckle, kudzu, ragweeds, dandelion, and other weeds as listed. It kills weeds to the roots. Apply this concentrated formula with an Ortho Dial ’N Spray or a tank sprayer around homes, cabins, buildings, fences, and along trails and rails. Wilting or yellowing will occur in 2 to 6 weeks. Ortho Groundclear Poison Ivy & Tough Brush Killer1 contains a proven weed killer that targets brush and vine weeds.