Non-Chemical Control

• 1). Cut the blackberry vines as close to ground level as you can with loppers for a small area or a weed trimmer for a larger area.
  
  
• 2). Put the cut vines into garbage bags and set to the side.
  
  
• 3). Dig up the blackberry roots and side roots. Pull them out of the ground and put them in the garbage bags.
  
  
• 4). Mow the area to get rid of blackberry vine stems that remain. Rake up vine debris if you don't have a lawn mower with a collection bag attached.
  
  
• 5). Rototill the soil in the area thoroughly, removing blackberry roots brought to the surface.
  
  
• 6). Remove new vine growth by digging and mowing the following year.
  
  

Chemical Control

• 1). Apply glyphosate herbicide in the late summer or early fall. Apply triclopyr in midsummer as long as the temperature is above 80 degrees Fahrenheit.
  
  
• 2). Spray the blackberry vine foliage thoroughly. All the foliage should be wet to ensure the vines soak up the herbicide.
  
  
• 3). Pick up vine stems when plants wither and turn brown. Pull or dig up roots. Put debris in garbage bags and take them to a landfill.