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Targeting Weed Seeds In-Crop: A New Weed Control Paradigm for Global Agriculture
TLDR
HWSC is introduced as a new paradigm for global agriculture and how these techniques have aided Australian grain cropping and their potential utility in global agriculture are discussed.
Widespread occurrence of multiple herbicide resistance in Western Australian annual ryegrass (Lolium rigidum) populations
TLDR
Ryegrass across the WA wheatbelt now exhibits multiple resistance across many but not all herbicides, posing severe management and sustainability challenges.
High Seed Retention at Maturity of Annual Weeds Infesting Crop Fields Highlights the Potential for Harvest Weed Seed Control
TLDR
High seed retention at crop maturity clearly indicates the potential for HWSC systems to reduce seed bank replenishment and diminish subsequent crop interference by the four most problematic species of Australian crops.
Understanding the potential for resistance evolution to the new herbicide pyroxasulfone: Field selection at high doses versus recurrent selection at low doses
TLDR
Persistent pyroxasulfone use at low dose has the potential to rapidly lead to herbicide resistance evolution in L. rigidum field populations, and effective stewardship programmes should be developed to minimise the possibility of rapid low-doseinduced resistance evolution and to ensure pyrox asulfone sustainability.
ALS gene proline (197) mutations confer ALS herbicide resistance in eight separated wild radish (Raphanus raphanistrum) populations
TLDR
It is concluded that selection pressure from chlorsulfuron on eight separate wild radish populations has resulted in target site mutation at the same proline residue in the ALS gene, and higher ALS activity also may play a role in the resistance level.
The Potential for Pyroxasulfone to Selectively Control Resistant and Susceptible Rigid Ryegrass (Lolium rigidum) Biotypes in Australian Grain Crop Production Systems
TLDR
The ability of pyroxasulfone to selectively control resistant and susceptible rigid ryegrass populations as identified in these studies clearly indicate the potential for widespread use and success of this herbicide in Australian cropping systems.
A novel amino acid substitution Ala-122-Tyr in ALS confers high-level and broad resistance across ALS-inhibiting herbicides.
TLDR
This is the first report of an amino acid substitution at Ala-122 in the plant ALS that confers high-level and broad-spectrum resistance to ALS-inhibiting herbicides, a remarkable contrast to the known mutation Ala- 122-Thr endowing resistance to imidazolinone herbicide.
Harrington Seed Destructor: A New Nonchemical Weed Control Tool for Global Grain Crops
TLDR
The Harrington Seed Destructor (HSD) system has the potential for a dramatic impact on global grain production by providing the unique combination of effective weed control with complete retention of grain crop harvest residues.
Resistance evaluation for herbicide resistance-endowing acetolactate synthase (ALS) gene mutations using Raphanus raphanistrum populations homozygous for specific ALS mutations
TLDR
A novel observation in this study is that resistance of homozygous Glu‐376 plants is associated with a remarkable growth reduction in the presence of the ALS herbicides tested, making early resistance diagnosis and management difficult.
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