Q: Is there a selective herbicide that will remove mondo grass from my St. Augustine lawn?
A: University of Georgia weed expert Dr Mark Czarnota says he screened several herbicides and metsulfuron(Manor) works great but might need 2 or 3 applications.
A similar herbicide, halosulfuron (Sedgehammer) does not control mondo grass. Mark says herbicides of this class can be very selective on plants of the same genus but of different species.
He also notes that Manor is very expensive: more than $100 dollars per bottle!