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Small-seeded false flax (Camelina microcarpa) management in Oklahoma winter wheat

Published online by Cambridge University Press:  09 July 2021

Jodie A. Crose*
Former: Graduate Research Assistant, Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA; current: Graduate Teaching Assistant, Department of Plant Science, University of Wyoming, Sheridan, WY, USA
Misha R. Manuchehri
Assistant Professor and State Extension Weed Science Specialist, Department of Plant and Soil Science, Oklahoma State University, Stillwater, OK, USA
Todd A. Baughman
Professor, Institute for Agricultural Biosciences, Oklahoma State University, Ardmore, OK, USA
Author for correspondence: Jodie Crose, Department of Plant Science, University of Wyoming, Sheridan, WY82801. Email:


Three herbicide premixes have recently been introduced for weed control in wheat: halauxifen + florasulam, thifensulfuron + fluroxypyr, and bromoxynil + bicyclopyrone. The objective of this study was to evaluate these herbicides along with older products for their control of small-seeded false flax in winter wheat in Oklahoma. Studies took place during the 2017, 2018, and 2020 winter wheat growing seasons. Weed control was visually estimated every 2 wk throughout the growing season, and wheat yield was collected in all 3 yr. Small-seeded false flax diameter was approximately 6 cm at the time of application in all years. Control ranged from 96% to 99% following all treatments with the exception of bicyclopyrone + bromoxynil and dicamba alone, which controlled false flax 90%. All treatments containing an acetolactate synthase (ALS)–inhibiting herbicide achieved adequate control; therefore, resistance is not suspected in this population. Halauxifen + florasulam and thifensulfuron + fluroxypyr effectively controlled small-seeded false flax similarly to other standards recommended for broadleaf weed control in wheat in Oklahoma. Rotational use of these products allows producers flexibility in controlling small-seeded false flax and reduces the potential for development of herbicide resistance in this species.

Research Article
© The Author(s), 2021. Published by Cambridge University Press on behalf of the Weed Science Society of America

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Associate Editor: Drew Lyon, Washington State University


Anonymous (2015–2016) Sentrallas® herbicide label. DuPont Publication No. SL-2000 050916. Wilmington, DE: DuPont. 13 pGoogle Scholar
Anonymous (2016) Talinor® herbicide label. Syngenta Publication No. SCP 1570A-L1 1116 4073421. Greensboro, NC: Syngenta. 23 pGoogle Scholar
Anonymous (2018) Quelex® herbicide label. Dow AgroSciences Publication No. D01-411-003. Indianapolis, IN: Dow AgroSciences. 5 pGoogle Scholar
Crose, JA, Manuchehri, MR, Baughman, TA (2019) Horseweed (Conyza canadensis) management in Oklahoma winter wheat. Weed Technol 34:229234 CrossRefGoogle Scholar
Francis, A, Warwick, SI (2009) The biology of Canadian weeds. 142. Camelina alyssum (Mill.) Thell.; C. microcarpa Andrz. ex DC.; C. sativa (L.) Crantz. Can J Plant Sci 89:791810 CrossRefGoogle Scholar
Frankton, C, Mulligan, GA (1987) Weeds of Canada. Toronto, ON: Agriculture Canada. p 217 Google Scholar
Geier, PW, Stahlman, PW, Peterson, DE, Claassen, MM (2011) Pyroxsulam compared with competitive standards for efficacy in winter wheat. Weed Technol 25:316321 CrossRefGoogle Scholar
Hanson, BD, Park, KW, Mallory-Smith, CA, Thill, DC (2004) Resistance of Camelina microcarpa to acetolactate synthase inhibiting herbicides. Weed Res 44:187194 CrossRefGoogle Scholar
Hunger, B, Marburger, D (2018) Foliar Fungicides and Wheat Production in Oklahoma. Stillwater, OK: Oklahoma State University Fact Sheet. CR-7668Google Scholar
Lofton, JJ, Manuchehri, MR, Haggard, B (2017) Weedy Mustards of Oklahoma. Stillwater, OK: Oklahoma State University Fact Sheet. PSS-2787Google Scholar
Oklahoma, Mesonet (2018) Daily Data Retrieval. Accessed: November 3, 2018Google Scholar
Oklahoma State University (2021) Grain Yield––Previous Years. /variety-testing/grain-yield. Accessed: November 9, 2020Google Scholar
Raun, B, Zhang, H (2006) Oklahoma Soil Fertility Handbook. 6th Edn. Stillwater, OK: Oklahoma State University. p 59 Google Scholar
Royer, F, Dickinson, R (1999) Weeds of Canada and the northern United States. Edmonton, AB: Lone Pine Publishing, University of Alberta Press. p 434 Google Scholar
Saxton, AM (1998) A macro for converting mean separation output to letter groupings in Proc Mixed. Pages 1243–1246 in Proceedings of the 23rd SAS Users Group International. Cary, NC: SAS InstituteGoogle Scholar
Seguin-Swartz, G, Nettleton, J, Sauder, C, Warwick, SI, Gugel, RK (2011) Hybridization potential between the oilseed crucifer Camelina sativa and canola, mustard, and related weeds. Pages 716–718 in Proceedings of 13th International Rapeseed Congress. Prague, Czech RepublicGoogle Scholar
Stevens, OA (1957) Weights of seeds and numbers per plant. Weeds 5:4655 CrossRefGoogle Scholar
Tranel, PJ, Wright, TR (2002) Resistance of weeds to ALS-inhibiting herbicides: what have we learned? Weed Sci 50:700712 CrossRefGoogle Scholar
Walsh, DT, Babiker, EM, Burke, IC, Hulbert, SH (2012) Camelina mutants resistant to acetolactate synthase inhibitor herbicides. Mol Breed 30:10531063 CrossRefGoogle Scholar