If one adds a couple of oz. ( or less [ like a squirt from the squeeze bottle ... put it in last into the sprayer as it tends to foam] if one is using a small amount of spray ) of any brand of liquid dish soap to the glycosphate ... it acts as a surfactant that spreads the solution evenly over the leaf surface for a much better absorption of the herbicide.Probably a generic clone of Roundup. Either their own brand -FarmWorks RM 43, which has 2 active ingredients. or Gordon's Pronto Big N Tuff which is just 41% glycosphate. Works well as a foliar application but does little to actually kill the root system of woody brush. It will "appear" to kill it, because all the leaves change to fall-like color, then turn black and die/fall off, but for brush, you really want to use either a basal application or a different herbicide. Otherwise, you are just spraying the same plant year after year. To kill woody brush, basal applications work best.
The Farmworks RM43 has glycosphate and imazapyr as the 2 active ingredients. Imazapyr is a restricted herbicide in my area, mean one has to have an applicator's lic to purchase it.
Glycosphate works well as a fence line maintenance tool because it is non-selective--that is, it should kill or knock back EVERYTHING on the fenceline. Nothing growing on the fenceline means livestock are much less likely to venture near the fence. Add 1 qt of 2,4d to your glycosphate per 100 gals total mixture, and your application rate can be decreased and kill rate will improve.