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

Gaylene Jill Somerville

doi:10.4225/23/5acc54074b78d

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

Gaylene Jill Somerville

UWA School of Agriculture and Environment

Research output: Thesis › Doctoral Thesis

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Abstract

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 language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Renton, Michael, Supervisor Walsh, Michael, Supervisor Powles, Steve, Supervisor
Award date	23 Oct 2017
DOIs	https://doi.org/10.4225/23/5acc54074b78d
Publication status	Unpublished - 2017

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10.4225/23/5acc54074b78d

THESIS - DOCTOR OF PHILOSOPHY - SOMERVILLE Gayle - 2018
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Cite this

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abstract = "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.",

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AB - 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.

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KW - spatial modelling

KW - somer

KW - harvest weed seed control

KW - herbicide resistance

KW - evolution

KW - annual ryegrass

KW - wheat

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DO - 10.4225/23/5acc54074b78d

M3 - Doctoral Thesis

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

Abstract

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