The role of imidazolinone herbicides for the control of Bromus rigidus (rigid brome) in wheat in southern Australia

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dc.contributor.authorKleemann, S.
dc.contributor.authorGill, G.
dc.date.issued2009
dc.descriptionCopyright © 2009 Elsevier Ltd. All rights reserved.
dc.description.abstractFive field experiments were undertaken over a three-year period in South Australia to investigate the efficacy of imidazolinone herbicides for the control of rigid brome in imidazolinone-tolerant wheat (Clearfield™, CLF). Imidazolinone herbicides, imazapyr, imazapyr plus imazapic and imazapyr plus imazamox applied post-emergence to imi-wheat (cvs. CLF-Janz and CLF-Stiletto) at the four-leaf stage, provided consistent and high levels of rigid brome control (≥87%). In contrast, applications of the alternative herbicide mesosulfuron-methyl (post-emergence) provided limited and variable control of rigid brome (11-67%). Furthermore, imidazolinone treatments caused a large reduction (P < 0.05) in rigid brome seed production (≤6 seeds m<sup>-2</sup>) as compared to mesosulfuron-methyl (461-3983 seeds m<sup>-2</sup>) and the non-treated control (2257-11 865 seeds m<sup>-2</sup>). Imazapyr plus imazapic provided consistent control of rigid brome and resulted in higher grain yields (28-45%) than wheat treated with mesosulfuron-methyl. Based on these results post-emergence applications of imazapyr, imazapyr plus imazapic and imazapyr plus imazamox to imi-wheat could play an important role in the management of rigid brome in southern Australia. However, the effect of these herbicides on existing and new cultivars of imi-wheat (multiple-gene resistance) and issues concerning persistence in low rainfall environments and crop damage on sandy soils require attention. © 2009 Elsevier Ltd. All rights reserved.
dc.description.statementofresponsibilitySamuel G.L. Kleemann and Gurjeet S. Gill
dc.identifier.citationCrop Protection, 2009; 28(11):913-916
dc.identifier.doi10.1016/j.cropro.2009.07.005
dc.identifier.issn0261-2194
dc.identifier.orcidGill, G. [0000-0002-3773-8100]
dc.identifier.urihttp://hdl.handle.net/2440/56000
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.source.urihttps://doi.org/10.1016/j.cropro.2009.07.005
dc.subjectClearfield™ wheat
dc.subjectHerbicide-tolerant wheat
dc.subjectIMI-wheat
dc.subjectImazapyr
dc.subjectImazapic
dc.subjectImazamox
dc.subjectMesosulfuron-methyl
dc.titleThe role of imidazolinone herbicides for the control of Bromus rigidus (rigid brome) in wheat in southern Australia
dc.typeJournal article
pubs.publication-statusPublished

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