The local Landcare group, Burnt Creek Landcare, have done some work on Paterson's Curse along the freeway.
Paterson's curse, Echium plantagineum (known as Salvation Jane in South Australia) is an introduced winter annual from the Mediterranean. Free of native Mediterranean plant and insect communities, it has become a dominant pasture weed of temperate Australia.
The first Australian infestation of Paterson's curse was recorded south west of Sydney in 1843, ironically in the Camden Park garden of wool industry pioneers John and Elizabeth Macarthur. No-one then could have envisaged it would quickly become the scourge of the pastoral industry. It also sold through nursery catalogues in Tasmania in 1854 and Melbourne a few years later. It was recorded near Port Pirie in South Australia in 1889 and in Albury a year later. It was here that it gained its name, escaping from the garden of the Paterson family. They lived near a busy stock route, but the curse also spread in contaminated seed. And now, throughout all of southern Australia, from Tasmania stretching to the south of Western Australia, the purple menace proliferates over some 40 million hectares. According to the CSIRO there's only one feasible remedy - biological warfare.
But I have another idea...
I reckon if I put a cache here, cachers will trample anything growing for many meters around GZ.
Problem solved!