These are post-emergent grass contol herbicides used for annual ryegrass and/or wild oat control in wheat and barley or non-selective grass control in broadleaf crops.
Links
[1] http://www.herbiguide.com.au/
[2] http://www.grdc.com.au/Resources/Factsheets/2012/05/Incrop-Herbicide-Use
[3] http://www.apvma.gov.au/