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Benzobicyclon as a Post-Flood Option for Weedy Rice Control

Published online by Cambridge University Press:  17 May 2018

Mason L. Young ,
Jason K. Norsworthy ,
Robert C. Scott ,
Jason A. Bond  and
James Heiser
Mason L. Young*
Affiliation:
Graduate Student, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
Jason K. Norsworthy
Affiliation:
Professor and Elms Farming Chair of Weed Science, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
Robert C. Scott
Affiliation:
Professor, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
Jason A. Bond
Affiliation:
Professor, Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS, USA
James Heiser
Affiliation:
Research Associate, Division of Plant Sciences, University of Missouri, Columbia, MO
*
Author for correspondence: Mason L. Young, 1366 W Altheimer Drive, Fayetteville, AR 72704. (Email: mly002@uark.edu)
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Abstract

Benzobicyclon will be the first 4-hydroxyphenylpyruvate dioxygenase (HPPD)–inhibiting herbicide available in US rice production pending registration completion. An observation of benzobicyclon controlling weedy rice in two field trials prompted a greenhouse and field evaluation to determine if benzobicyclon would control weedy rice accessions from Arkansas, Mississippi, and southeastern Missouri. A total of 100 accessions were screened in the greenhouse and field. Percentage mortality was determined in the greenhouse, and percentage control was recorded in the field. Benzobicyclon at 371 g ai ha–1 caused at least 80% mortality of 22 accessions in the greenhouse and at least 80% control of 30 accessions in the field. For most accessions, individual plants within the accession varied in response to benzobicyclon. Based on these results, the sensitivity of weedy rice to benzobicyclon varies across accessions collected in the midsouthern United States, and it may provide an additional control option for weedy rice in some fields.

Keywords

Daniel Stephenson, Louisana State University Agricultural CenterBenzobicyclonweedy rice, Oryza sativa L.rice, Oryza sativa L.Herbicide resistancephenotypic characteristicsscreeningsurveytolerance
Type
Research Article
Information
Weed Technology , Volume 32 , Issue 4 , August 2018 , pp. 371 - 378
Copyright
© Weed Science Society of America, 2018 

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