A national assessment of serrated tussock resistance to the herbicide flupropanate in Australia.

A population of serrated tussock at Diggers Rest just north-west of Melbourne has been identified as being resistant to the herbicide flupropanate. This has prompted a national mail survey of 5000 land managers impacted by serrated tussock across Australia. Survey results have shown that serrated tussock has spread widely throughout Victoria, NSW, ACT and Tasmania with 15 out of 400 respondents reporting resistance and requiring further investigation. The survey has also shown that serrated tussock is costing each land manager between $15,000 and $20,000 annually in control and lost production costs. This emphasises the importance of promoting integrated management of serrated tussock