Hygeia Mortone 20LHygeia Mortone 20L Professional Use Only: Please provide your Herd Flock Number Professional Use Number Due to Regulations, a valid Herd Flock Number or Professional Use Number must be provided for the purchase of pesticides, rodenticides or herbicides. You can send your number to Marketing@keanscm. ie Contents: 1 x Mortone 20L A selective herbicide for the control of rushes plus other broad leaf weeds in grassland and cereals Soft rushes use 4. 5