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Applications of Metribuzin for the Control of Rigid Brome (Bromus rigidus) in No-Till Barley Crops of Southern Australia

Published online by Cambridge University Press:  20 January 2017

Samuel G.L. Kleemann  and
Gurjeet S. Gill
Samuel G.L. Kleemann*
Affiliation:
School of Agriculture, Food & Wine, University of Adelaide, Roseworthy Campus, South Australia, Australia 5371
Gurjeet S. Gill
Affiliation:
School of Agriculture, Food & Wine, University of Adelaide, Roseworthy Campus, South Australia, Australia 5371
*
Corresponding author's E-mail: [email protected]
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Abstract

Field experiments were conducted at Warooka and Rudall on the Yorke and Eyre Peninsula of South Australia during 2004 and 2005 to investigate the effectiveness of metribuzin for the selective control of rigid brome in no-till sown barley. Metribuzin (135 to 203 g ai/ha) incorporated by sowing (IBS) was more effective in controlling rigid brome (> 67%) than the same herbicide dose applied POST. Although IBS metribuzin at the highest rate (270 g/ha) provided effective weed control (82 to 90%), it was more phytotoxic to barley, reducing crop density by 23% relative to the nontreated control at Rudall. Soil at Rudall had low clay and organic matter content. In contrast, tank mixtures of metribuzin (203 g/ha) with pendimethalin, applied IBS, provided reliable rigid brome control (89 to 93%) and resulted in little crop damage (< 5%). Over the site-by-year combinations studied, all herbicide-treated barley at Warooka and Rudall yielded 6 to 50% more grain than the nontreated crop. Although metribuzin provides growers with an opportunity to selectively control rigid brome in no-till barley, high rates (≥ 203 g/ha) of this herbicide on sandy textured soils can result in significant crop damage.

Keywords

Metribuzinrigid brome, Bromus rigidus Roth BRORIbarley, Hordeum vulgare L.Trifluralinpendimethalinherbicide applicationherbicide timingno-tillyield
Type
Research
Information
Weed Technology , Volume 22 , Issue 1 , March 2008 , pp. 34 - 37
Copyright
Copyright © Weed Science Society of America 

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