Weed control at Brooklyn

Weed control at Brooklyn

Grader grass weed.

114 species of weeds have been identified at Brooklyn, reflecting its previous use as a cattle station and a long history of small-scale disturbance.  Many of these weeds are unlikely to be environmentally significant.  AWC’s weed management strategy at Brooklyn includes specific control programs for those weed species which may have a significant environmental impact.

Rubber vine and grader grass are two of the more serious weeds on the Mitchell River alluvial flats.  Rubber vine is controlled by small hot fires set among delineated patches of the weed just before the summer storms.  Grader grass (an annual pest that is very widespread throughout northern Australia) is experimentally controlled by cool fires early in the dry season, before the grass has set its seeds.

Smaller infestations of caltropis, Gamba grass, thatch grass and hymenachne are treated with herbicides.  Escapees from the Mt Carbine and Mary farms settlements include yellow oleander, leucaena and lantana, which are also treated with herbicides or simply dug out.

Seca Stylo is common in the lowlands where it was introduced as a cattle fodder. This weed is currently managed by AWC using fire.  The AWC science team is developing a research program to determine the most effective fire frequency and intensity to reduce the area of occupancy of this weed.