Hexazinone

Hexazinone is a non-selective broad spectrum herbicide of the triazine class. It is manufactured by DuPont and sold under the trade name Velpar. It is used to control grasses and broadleaf and woody plants. Approximately 33% is used on alfalfa, 31% in forestry, 29% in industrial areas, 4% on rangeland and pastures, and < 2% on sugarcane.

In 1989, hexazinone was deliberately used in an act of vandalism to poison Treaty Oak in Austin, Texas.