For younger brush "Hardball" might work for you. I personally like Hardball and Roundup Custom or Rodeo mixed because that will get the broadleaf and grassy weeds at the same time if you want to get most all the vegataion around the banks.
Sorry, I'm not sure if the Hardball even comes in quart size containers. If it doesn't you cannot get it without a license.
Edited by Turf Dawg (07/03/16 05:20 AM)
Turf Dawg Landscaping
Texas Licensed Irrigator
Commercial Pesticide Applicator for Turf and Ornamental, Pasture & Rangelands and Right-of-Way
Texas Dept of Agriculture license #0525163