The biology of Nassella and Achnatherum species naturalized in Australia and the implications for management on conservation lands

M.R. GardenerA and B.M. SindelB

Division of BotanyA and Division of Agronomy and Soil ScienceB, School of Rural Science and Natural Resources and CRC for Weed Management Systems, University of New England, Armidale, NSW 2351, Australia.


Several species of Nassella and Achnatherum are weeds of both conservation and pasture lands. These species have proven to be difficult to control and have continued to spread since their introduction to Australia. The impact of these species on conservation lands includes a perceived drop in biodiversity and a decrease in aesthetic value. Reasons for the ability of these species to out-compete native vegetation include effective dispersal mechanisms, the production of large amounts of aerial and clandestine seeds and large long-lived seedbanks. Management strategies must take these factors into account.


Plant Protection Quarterly (1998) 13 (2) 76-79.