Research under way in to biological control of sagittaria
Sagittaria platyphylla (sagittaria, delta arrowhead), is a serious aquatic weed affecting irrigation channels, drains, creeks and wetlands. Despite intensive herbicide control programs, sagittaria continues to be an ongoing issue due to the ability of plants to regrow from tubers and submersed
rosettes.
http://www.gbcma.vic.gov.au/news_events/biological-control.html