The extent of herbicide resistance in Tasmanian wild radish populations

John Broster, Allison Chambers, Leslie Weston

Research output: Book chapter/Published conference paperConference paperpeer-review

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Weeds are one of the major limiting factors in cropping systems and the development of resistance to herbicides used for their control can result in increased cost and complexity in managing these weed populations. With
a high proportion of wild radish populations in Western Australia resistant to herbicides, along with a lower proportion in southern New South Wales it could be expected that some Tasmanian populations would also be resistant even though herbicide resistance in Tasmanian ryegrass populations occurs at a lower frequency than many other regions of Australia. For this reason wild radish seed samples were collected as part of a field survey of Tasmanian cropping paddocks in January 2015 to determine the extent of herbicide resistance in a number of weed species. A total of 75 paddocks in Tasmania were visited just prior to harvest from which 25 wild radish samples were collected, the second most common weed behind ryegrass. The samples were screened between March and May 2015 to six herbicides (chlorsulfuron, imazamox/imazapyr, atrazine, diflufenican, 2,4-D amine and glyphosate). The results from the screening will be compared with results from surveys conducted in Western Australia and southern New South Wales and the reasons for differences discussed.
Original languageEnglish
Title of host publication17th Proceedings of the Australian Agronomy Conference
Subtitle of host publicationBuilding productive, diverse and sustainable landscapes
Place of PublicationHobart, Tasmania
PublisherAustralian Society of Agronomy
Number of pages4
Publication statusPublished - 2015
Event17th Australian Agronomy Conference - Wrest Point Convention Centre , Hobart, Australia
Duration: 21 Sept 201524 Sept 2015


Conference17th Australian Agronomy Conference
Abbreviated titleBuilding Productive, Diverse and Sustainable Landscapes
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