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Florpyrauxifen-benzyl activity on perennial grass weeds found in Louisiana rice production

Published online by Cambridge University Press:  14 March 2019

Gustavo M. Teló ,
Eric P. Webster Open the ORCID record for Eric P. Webster [Opens in a new window] ,
David C. Blouin ,
Benjamin M. McKnight  and
Samer Y. Rustom Jr.
Gustavo M. Teló
Affiliation:
Postdoctoral Researcher, School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
Eric P. Webster*
Affiliation:
Professor, School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
David C. Blouin
Affiliation:
Professor, Department of Experimental Statistics, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
Benjamin M. McKnight
Affiliation:
Postdoctoral Researcher, School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
Samer Y. Rustom Jr.
Affiliation:
Graduate Assistant, School of Plant, Environmental, and Soil Science, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
*
Author for correspondence: Eric P. Webster, Email: ewebster@agcenter.lsu.edu
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Abstract

A glasshouse study was conducted on the Louisiana State University campus in Baton Rouge, LA, to evaluate the control of brook crowngrass, rice cutgrass, southern watergrass, and water paspalum. Florpyrauxifen-benzyl was applied at 30 g ai ha−1 to each grass species at the 3- to 4-leaf or 1- to 2-stolon stage of growth. Brook crowngrass treated with florpyrauxifen was controlled 71% at 21 d after treatment. Southern watergrass and water paspalum control did not exceed 56% and 36%, respectively, across all evaluations. Rice cutgrass treated with florpyrauxifen did not reach 15% control. Plants treated with florpyrauxifen, except rice cutgrass, displayed reduction in leaf number, stolon number, plant height, and plant fresh weight. These results indicate florpyrauxifen-benzyl can help manage a brook crowngrass infestation and suppress southern watergrass. However, florpyrauxifen-benzyl has little to no activity on water paspalum and rice cutgrass, and other management options should be employed if these weeds are present.

Keywords

Jason Bond, Mississippi State UniversityFlorpyrauxifen-benzylbrook crowngrass, Paspalum acuminatum Raddirice cutgrass, Leersia oryzoides (L.) Sw.southern watergrass, Luziola fluitans (Michx.) Terrell & H. Rob.water paspalum, Paspalum modestum Mez.rice, Oryza sativa L.Postemergence herbicidesynthetic auxins
Type
Research Article
Information
Weed Technology , Volume 33 , Issue 2 , April 2019 , pp. 246 - 252
Copyright
© Weed Science Society of America, 2019 

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