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Title: Management of invasive 'Poa annua' in the sub-Antarctic wilderness of Macquarie Island
Contributor(s): Williams, Laura Kate (author); Kristiansen, Paul  (author)orcid ; Sindel, Brian M  (author)orcid ; Shaw, Justine  (author); Wilson, Susan C  (author)orcid 
Publication Date: 2014
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Abstract: 'Poa annua' L. is the most widespread weed in the sub-Antarctic, present on all major island groups and on the Antarctic Peninsula. Its ability to withstand heavy grazing has enabled it to spread significantly on islands with introduced herbivores. On Australia's World Heritage Macquarie Island it is common and widespread. With the recent eradication of rabbits and associated change to vegetation dyna-mics it is critical to understand the distribution and abundance of 'P. annua' in this rapidly changing environment. Our study aimed to investigate management techniques for 'P. annua' to assist in the development of non-native plant management in the sub-Antarctic and Antarctic. Experiments were designed to study the response of 'P. annua' and native species to physical disturbance and herbicide application. Our preliminary studies indicated that physical disturbance promotes the growth of 'P. annua' over native species, and glyphosate, rimsulfuron and trifloxysulfuron selectively control 'P. annua' under simulated sub-Antarctic temperatures while amitrole, clethodim, dithiopyr, ethofumesate, fluproponate-sodium, imazamox, simazine and methabenzthiazuron are less effective. These results provide promising avenues for further research that will contribute to the development of control programs in the sub-Antarctic and Antarctic region.
Publication Type: Conference Publication
Conference Details: 19th Australasian Weeds Conference - Science, Community and Food Security: the Weed Challenge, Hobart, Australia, 1st - 4th September, 2014
Source of Publication: 19th Australasian Weeds Conference Proceedings, p. 324-327
Publisher: Tasmanian Weed Society
Place of Publication: Hobart, Australia
Field of Research (FOR): 050103 Invasive Species Ecology
Socio-Economic Objective (SEO): 960412 Control of Plant Pests, Diseases and Exotic Species in Coastal and Estuarine Environments
960801 Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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