Roundup is changing its ingredients, here are some other weed-killer options | George Weigel - pennlive.com
Amazon.com: Roundup Pro Herbicide Industrial Weed Control for Annual and Perennial Weeds such as Woody Brush, Trees, and Vines, 2.5 Gal. : Patio, Lawn & Garden
Roundup Super Concentrate Weed & Grass Killer, 1 gal. at Tractor Supply Co.