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Assessment of Florpyrauxifen-benzyl Potential to Carryover to Subsequent Crops

  • M. Ryan Miller (a1) and Jason K. Norsworthy (a2)


Florpyrauxifen-benzyl is a new synthetic auxin herbicide that will provide a novel site of action in rice production. In many areas of the United States it is common practice to plant soybeans in rotation with rice, thereby introducing the potential for herbicide carryover. Multiple field experiments were conducted in 2014 and repeated in 2015 to evaluate potential plant-back restrictions for soybean and other row crops following an application of florpyrauxifen-benzyl. In the first experiment, treatments comprised florpyrauxifen-benzyl applied at 40 followed by 40 g ai ha–1, 80 fb 80 g ai ha–1, and a nontreated check. In 2014, herbicides were applied to a silt loam soil near Stuttgart and Colt, AR, and fields remained fallow following application. The following year, corn, cotton, soybean, grain sorghum, and sunflower were planted within the previously treated area. Stand counts, crop heights, and visual injury assessments were done for each crop following planting, and aboveground biomass data were collected 28 d after planting. No significant differences were observed among the treatments for any of the parameters assessed, highlighting the rotational flexibility of common row crops 1 yr following a florpyrauxifen-benzyl application. In the second experiment, florpyrauxifen-benzyl was applied at 30 and 60 g ai ha–1 at 56, 28, 14, and 0 d before planting soybean. Injury assessments corresponded to the highest concentration of florpyrauxifen-benzyl and its metabolites recovered from soil at the time of planting. Conversely, soybean injury was reduced when florpyrauxifen-benzyl was applied at increasing intervals before planting. At the end of each season, soybean yield was similar to the nontreated control when florpyrauxifen-benzyl at 30 or 60 g ai ha–1 was applied 56 d before planting, whereas all other treatments reduced yield. These results support a relatively short replant interval for soybean after florpyrauxifen-benzyl application to rice.


Corresponding author

Author for correspondence: M. Ryan Miller, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704. (Email:


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Anonymous (2017) Newpath herbicide label. BASF Corp. Research Triangle Park, NC. 27709
Barber, LT, Norsworthy, JK, Scott, B (2014) Row crop plant-back intervals for common herbicides. University of Arkansas, Cooperative Extension Service MP519.
[EPA] Environmental Protection Agency (2005) Environmental fate and ecological risk assessment for the registration of aminopyralid. Accessed: November 21, 2017
Epp, JB, Alexander, AL, Balko, TW, Buysse, AM, Brewster, WK, Bryan, K, Daeuble, JF, Fields, SC, Gast, RE, Green, RA, Irvine, NM, Lo, WC, Lowe, CT, Renga, JM, Richburg, JS, Ruiz, JM, Satchivi, NM, Schmitzer, PR, Siddall, TL, Webster, JD, Weimer, MR, Whiteker, GT, Yerkes, CN (2016) The discovery of ArlyexTM active and RinskorTM active: two novel auxin herbicides. J Bioorganic Medicinal Chem 24:362371
Grey, TL, Braxton, LB, Richburg, III JS (2012) Effect of wheat herbicide carryover on double-crop cotton and soybean. Weed Technol 26:207212
Hardke, JT (2014) Arkansas Rice Production Handbook. University of Arkansas Division of Agriculture, Cooperative Extension Service. Pp 5362
Heap, I (2018) The International Survey of Herbicide Resistant Weeds. Accessed: February 3, 2018
Kruger, EL, Rice, PJ, Anhalt, JC, Anderson, TA, Coats, JR (1997) Comparison fates of atrazine and deethylatrazine in sterile and nonsterile soils. J Environ Qual 26:95101
Lee, S, Sundaram, S, Armitage, L, Evans, JP, Hawkes, T, Kepinski, S, Ferro, N, Napier, RM (2013) Defining binding efficiency and specificity of auxins for SCFTIR1/AFB-Aux/IAA co-receptor complex formation. ACS Chem Biol 9:673682
Marchesan, E, dos Santos, FM, Grohs, M, de Avila, LA, Machado, SLO, Senseman, SA, Massoni, PFS, Satori, GMC (2010) Carryover of imazethapyr and imazapic to nontolerant rice. Weed Technol 24:610
Mikkelson, JR, Lym, RG (2011) Aminopyralid soil residues affect crop rotation in North Dakota soils. Weed Technol 25:422429
Mueller, TC, Senseman, SA (2015) Methods related to herbicide dissipation or degradation under field or laboratory conditions. Weed Sci (SI) 63:133139
Renner, KA, Schabenberger, O, Kells, JJ (1998) Effect of tillage application method on corn (Zea mays) response to imidazolinone residues in soil. Weed Technol 12:281285
Riar, DS, Norsworthy, JK, Steckel, LE, Stephenson, DO, Eubank, TW, Bond, J, Scott, RC (2013) Adoption of best management practices for herbicide-resistant weeds in midsouthern United States cotton, rice, and soybean. Weed Technol 27:788797
Vencill, WK (2002) Herbicide Handbook. 8th edition. Lawrence, KS: Weed Science Society of America, Allen Press
Walker, A, Welch, SJ (1991) Enhanced degradation of some soil-applied herbicides. Weed Res 31:4957
Zhang, W, Webster, EP, Braverman, MP (2002) Rice (Oryza sativa) response to rotational crop and rice herbicide combinations. Weed Technol 16:340345



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