triclopyr amine (Garlon 3A, Brush-B-Gone, or Brush Killer) or triclopyr ester (Garlon 4, Pathfinder, or Vinex) or glyphosate (Accord, Glypro, or Rodeo)
Rate at least 41% active ingredient (3 lb ae or 4 lb ai) glyphosate
Remarks Basal bark application: apply 33% dilution of triclopyr or glyphosate to exposed stems after stripping the leaves from stems near ground level.
Cut stem application (most effective method): cut each vine stem close to the ground and treat freshly cut surfaces (preferably within 5 minutes) with a 33% solution of triclopyr amine or glyphosate mixed in water. Do not dilute products such as Brush-B-Gone and Brush Killer. Roundup Pro Concentrate (50.2% formulation) may be diluted with water.
Foliar application From summer to fall, foliar-apply a 2 to 5% solution of triclopyr ester mixed in water with a nonionic surfactant. Fully coat foilage. Some control may be possible with glyphosate as a 2 to 4% dilution using at least a 41% (3 lb ae or 4 lb ai glyphosate), but repeat applications will probably be necessary. Broadcast applications of triclopyr will cause less damage to desirable grasses.
Manual and mechanical Pull vines on the ground by hand and discard. Cut vines will root easily. Cut climbing vines near the ground, then pry the vines from the tree or structure. Once the vines are cut they will eventually die and fall from the tree, usually after the first extended hot and dry period. Occasionally vines will be embedded in the trunk of the tree. This makes control by both hand and chemicals very difficult; continual removal of sprouts will be needed.
Site of action (triclopyr) Group 4: synthetic auxin; (glyphosate) Group 9: inhibits EPSP.
Chemical family (triclopyr) pyridine; (glyphosate) none generally accepted