Australian Herbicide Resistance Initiative

Dr Michael Widderick on sowthistle

Sowthistle is the kind of weed which can be a pain all-year-round. It’s particularly problematic for farmers in the North-Eastern part of the country. Jessica Strauss talks to Principal Research Scientist from the Queensland Department of Agriculture and Fisheries, Michael Widderick, about the strengths and weaknesses of this weed and how to manage it effectively, based on Michael and other’s research.


Blog: AHRI insight
Sowthistle – know the enemy, exploit its weakness

Wed, 18 Oct 2017

Going into the 1932-33 Ashes tour in Australia, Don Bradman was averaging around 100, and he had averaged 139 in the 1930 tour of England. He seemed unbeatable. How then, did he go on to only averaging a paltry 56.57 in 1932-33 Ashes? Simple, the English cricket team had discovered his weakness, short, fast, leg side bowling known as bodyline, and they employed this tactic much to the chagrin of the Australian public. ‘It’s just not cricket!’ When we are faced with a new enemy, that is seemingly unbeatable, we need to investigate its weaknesses and then perhaps we can…

Featured Publication
Publications A double EPSPS gene mutation endowing glyphosate resistance shows a remarkably high resistance cost

Thu, 12 Oct 2017

This study was done with an Eleusine indica population originating from Malaysia that evolved resistance to glyphosate. This population was studied by AHRI PhD research student Adam Jalaludin. He established that this population exhibits extremely high-level glyphosate resistance (Jalaludin et al, 2014, Weed Research).  Subsequent AHRI mechanistic studies found that this high-level glyphosate resistance is conferred by a double mutation within the EPSPS gene, known as TIPS, 102 Ile/106 Ser (Yu et al, 2015, Plant Physiology). Thus far, this is the only known case of this novel glyphosate resistance endowing double TIPS mutation evolving in weed plants under glyphosate selection.

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