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Type: Journal article
Title: The role of imidazolinone herbicides for the control of Bromus rigidus (rigid brome) in wheat in southern Australia
Author: Kleemann, S.
Gill, G.
Citation: Crop Protection, 2009; 28(11):913-916
Publisher: Elsevier Sci Ltd
Issue Date: 2009
ISSN: 0261-2194
Statement of
Samuel G.L. Kleemann and Gurjeet S. Gill
Abstract: Five 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-2) as compared to mesosulfuron-methyl (461-3983 seeds m-2) and the non-treated control (2257-11 865 seeds m-2). 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.
Keywords: Clearfield™ wheat
Herbicide-tolerant wheat
Description: Copyright © 2009 Elsevier Ltd. All rights reserved.
DOI: 10.1016/j.cropro.2009.07.005
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Appears in Collections:Agriculture, Food and Wine publications
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