Dangerous. I would never apply something that ran on any kind of incline. A no runoff application would look like oryzalin or pendimethalin + Goal. Pick your postemergent combination depending on what has established there. Glyphosate is ok if there are no vines or brush.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738