Reward + a nonionic surfactant will work very well. Non systemic top kill in 24-48 hours of both grasses and broadleaves. Spray to wet, do not inhale, ingest or get on skin or eyes.
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