raspberry problem

i have just moved into a different home and there seems to be raspberry plants growing in the fence row and have bled over to my barn about 15 ft worth and i'm looking for a way to keep them from growing back the people that lived there before said they have cut them and used round up but they seem to come back is there some thing that works?????????

 

Once the vines come out dormancy you ca n use a product I use it is called CrossBow. In the lawn care field it is called Chaser or Turflon. At Home Depot it is called Brush and Poison Ivy control by Ortho. It does work best appying
it in early fall before the plant goes dormant and the plant will pull the chemical down to the root and kills it over the winter.