Weed control at Pungalina-Seven Emu

Weed control at Pungalina-Seven Emu

Parkinsonia weed

Invasive weeds are a having a major environmental impact across much of the Gulf region.  However, primarily because of its remote location and short history of pastoralism, Pungalina-Seven Emu remains relatively weed free.

The major weed requiring attention on Pungalina-Seven Emu is Parkinsonia.  Parkinsonia seeds are dispersed by floodwater and Parkinsonia plants are  thus distributed patchily along the Calvert River bank.  This woody weed is treated by cutting the trunk off just above ground level and treating the cut stump with herbicide.  Several hundred hectares of this weed have been removed from Pungalina-Seven Emu using this technique.  (The Shadforth family delivered much of this program.) 

AWC is now co-ordinating a major regional control project to control Parkinsonia across the Calvert River catchment, targeting the removal of seeding trees from the upper reaches of the catchment.  Funded primarily by the Federal Government, the program involves indigenous and pastoral neighbours.  .

There are a total of 30 weed species on Pungalina-Seven Emu.  Most are opportunists in disturbed areas and have limited environmental impact.  These species will diminish as sources of disturbance (cattle, frequent fire, etc) are reduced.  However, AWC staff also undertake strategic control in key areas to limit their spread.

In addition to Parkinsonia, current control efforts are focused on two species: Hyptis and Sabi grass.