I use Gly 4 Plus on the fence lines and it kills everything, now the briars it dries them out where a string can cut them down no problem if they are larger with the harder stock to them, but young green ones just coming up it takes them out too.
I also mix my stronger I put 20 ounces per 15 gallon and it takes everything out.
Cars says to add some dawn dish washing liquid and it sticks to it better, I have not tried it yet.
Oh and I purchase it at Southern States in the 2.5 gallon concentrate.