Answer: Vines growing on trees can be difficult to pull out of the ground because their roots may be entangled with the tree's roots. Sever the vine at the base and carefully pull it out of the tree. Glyphosate (eg., Roundup or Ortho's Kleeraway Grass & Weed Killer), a non-selective, translocated herbicide, can be applied to the new shoots that will soon emerge from the base of the old plant. This herbicide is most effective if applied to actively growing foliage two weeks on either side of full bloom, in early summer.
Another herbicide that may be used is triclopyr (eg., Ortho's Brush-B-Gon Poison Ivy Killer). Poison ivy is difficult to control even with herbicides. Neither glyphosate nor triclopyr will provide complete control from a single application, and repeat applications to treat regrowth may be necessary. Other herbicide brands or formulations may be found at your local garden center. Be sure to read the label to ensure that poison ivy is listed on the label, then follow the manufacturer's directions.
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