Impact of serrated tussock
It is a highly invasive weed described as causing a greater reduction in carrying capacity than any other pasture weed in Australia.
Serrated tussock has been listed by the NSW Department of Environment and Climate change as a key threatening process to the biodiversity of native grasslands.
Serrated tussock was declared a Weed of National Significance (WoNS) in 1999 due to its invasiveness, potential for spread and social and economic impacts. Left unmanaged it has the capacity to greatly reduce productivity of grazing lands, impact on biodiversity values and in inaccessible and difficult to manage areas, can be a continuous source of seed for whole regions and communities.
A weed risk assessment (WRS) is a way of determining a species' invasiveness, its presence and potential distribution, and the impact of the weed. WRA's are used to assist land managers decide the best way to control weeds. They help make desisions about which weed species need priority action. Monash University has a valuable database of weed risk assessment.