The influences of spatial structure and stacking weed control tactics on predictions of herbicide resistance evolution

Gaylene Jill Somerville

Research output: ThesisDoctoral Thesis

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A new Spatially Orientated Model of Evolutionary Resistance (SOMER) was developed to examine weed management strategies. This model was used to examine herbicide usage, seed and pollen dispersal, human mediated weed-seed dispersal, and harvest weed seed control (HWSC). Shorter acting herbicides were found to be protected from resistance by more effective herbicides used later in the same season. Accounting for crop field spatial structure resulted in a slower evolution of herbicide resistance (particularly multiple resistance), and also provided information on patch management and HWSC. HWSC reduced weed numbers, and nearly eliminated multiple herbicide resistance evolution. Results highlight the importance of integrated weed management.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
  • Renton, Michael, Supervisor
  • Walsh, Michael Joseph, Supervisor
  • Powles, Stephen, Supervisor
Award date23 Oct 2017
Publication statusUnpublished - 2017


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