Follow link above to other sagittaria management and research information
Sagittaria causes significant impacts to irrigation channels, waterways and wetlands in the southern MDB. Severe infestations block irrigation channels and drains, increase silt accumulation, and restrict flows in wetlands and natural waterways, adversely affecting biodiversity and impacting on recreational activities. Sagittaria is difficult and expensive to control: annual costs to irrigation managers alone can exceed $2 million.
A Tri-State Taskforce – New South Wales, South Australia and Victoria – was established in 2004 and developed the Sagittaria Tri-State Plan which supported a national effort successfully listing sagittaria as a Weed of National Significance (WoNS) in 2012. The WoNS initiative is a collaborative effort among all States and Territories and the Commonwealth Government, and aims to prevent spread and reduce the impacts of some of the most significant weeds in Australia. All WoNS have national strategic plans that recognise local, regional and state priorities, and contain management actions that are relevant and achievable at local and regional levels.
This portal is a central point for sagittaria managers, planners and researchers to store and share information to support coordinated, strategic management of this weed across the MDB. It is open to all and everyone is encouraged to add or update information regularly.
MDB Sagittaria Control Zones
To address a key goal of the WoNS Sagittaria Strategic Plan – prevention of further spread, sagittaria control zones (SCZ) are being developed for the MDB. These zones will allow control and management efforts to be strategically directed at containing the westward spread of sagittaria in the MDB and protecting priority MDB assets. Cooperation is critical to achieving these cross-regional goals, and a group of sagittaria managers are working together to develop the SCZ.
The draft SCZ map provided on this page is a work in progress, and zone definitions are yet to be established. If you are interested in working with these partners to develop and progress the SCZ, please use the tab at the bottom of this page to provide your contact details, comments on the SCZ map or the SCZ process.
The high risk pathways map is a simplistic depiction of areas at risk of infestation based on direction of water flow within catchments.