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Sweetpotato Tolerance and Palmer Amaranth Control with Metribuzin and Oryzalin

Published online by Cambridge University Press:  14 September 2017

Stephen L. Meyers ,
Katherine M. Jennings  and
David W. Monks
Stephen L. Meyers*
Affiliation:
Graduate Research Assistant, Assistant Professor, and Professor, Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695.
Katherine M. Jennings
Affiliation:
Graduate Research Assistant, Assistant Professor, and Professor, Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695.
David W. Monks
Affiliation:
Graduate Research Assistant, Assistant Professor, and Professor, Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695.
*
*Corresponding author’s E-mail: [email protected]
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Abstract

Field studies were conducted in Clinton, NC in 2007 and 2009 to determine sweetpotato crop response and Palmer amaranth control with metribuzin and oryzalin. Treatments consisted of 140 and 202 g ai ha−1 metribuzin applied immediately after transplanting [0 wk after transplanting (WAP)] or 2 WAP, 560 and 1121 g ha−1 oryzalin 0 WAP, and tank mixes of metribuzin (140 or 202 g ha−1) and oryzalin (560 or 1,121 g ha−1) 0 WAP. At 2 WAP, metribuzin alone applied 0 WAP resulted in greater crop injury (33%) than oryzalin alone (1%), and the tank mix of metribuzin plus oryzalin resulted in greater crop injury (49%) than either herbicide applied alone. Greater crop injury occurred when metribuzin was applied at 202 g ha−1 (54%) than 140 g ha−1 (34%). Levels of injury were similar at 4 WAP (34, 8, and 52% for metribuzin, oryzalin, and the tank mix, respectively). At 4 WAP, injury from metribuzin was greater when it was applied 0 WAP (34%) compared to 2 WAP (18%). By 10 WAP, injury from metribuzin applied at 2 WAP was only 4%. At 4 WAP, Palmer amaranth control was excellent for all treatments and ≥98%. At 10 WAP, control among treatments ranged from 77% to 85%. Palmer amaranth control provided by metribuzin was similar for applications made 0 WAP (78%) and 2 WAP (77%). Oryzalin alone provided similar control (85%) to metribuzin alone 0 WAP, but greater control than the tank mix (77%). Neither metribuzin nor oryzalin rate differed in weed control provided at 10 WAP. Oryzalin 0 WAP and metribuzin 2 WAP provided no. 1 sweetpotato yields equivalent to the hand-weeded check. No. 1 yields of all other treatments were less than the hand-weeded check but greater than the weedy check.

Keywords

MetribuzinoryzalinPalmer amaranth, Amaranthus palmeri S. Wats.sweetpotato, Ipomoea batatas L. Lam. ‘Beauregard’ and ‘Covington’Herbicide toleranceweed control
Type
Weed Management-Other Crops/Areas
Information
Weed Technology , Volume 31 , Issue 6 , December 2017 , pp. 903 - 907
Copyright
© Weed Science Society of America, 2017 

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Footnotes

a

Current address of first author: Assistant Professor, North Missisisppi Research and Extension Center–Pontotoc Ridge–Flatwoods Branch Experiment Station, Mississippi State University, Pontotoc, MS 38863.

Associate Editor for this paper: Peter J. Dittmar, University of Florida.

References

Literature Cited

Anonymous. (2014) Surflan AS herbicide product label. King of Prussia, PA: United Phosphorus, Inc. 8 pGoogle Scholar
Barkley, SL, Chaudhari, S, Jennings, KM, Schultheis, JR, Meyers, SL, Monks, DW (2016) Fomesafen programs for Palmer amaranth (Amaranthus palmeri) control in sweetpotato. Weed Technol 30:506–515 Google Scholar
Frans, RE, Talbert, R, Marx, D, Crowley, H (1986) Experimental design and techniques for measuring and analyzing plant responses to weed control practices. Pages 29–46 in Camper ND ed. Research Methods in Weed Science. Champaign, IL: South Weed Sci Soc Google Scholar
Freitas, SP, Sediyama, T, Sediyama, MAN, Ferreira, FA, Sediyama, CS (1998) Efeitos de dejeto de suinos na incidencia de plantas daninhas e na eficiencia do herbicida metribuzin na cutlura da batata-doce. Planta Daninha 16:85–96 Google Scholar
Glaze, NC, Hall, MR (1990) Cultivation and herbicides for weed control in sweet potato (Ipomoea batatas). Weed Technol 4:518–523 Google Scholar
Gossett, BJ, Murdock, EC, Toler, JE (1992) Resistance of Palmer amaranth (Amaranthus palmeri) to the dinitroaniline herbicides. Weed Technol 6:587–591 Google Scholar
Harrison, HF Jr, Jones, A, Dukes, PD (1985) Differential response of six sweet potato (Ipomoea batatas) cultivars to metribuzin. Weed Sci 33:730–733 Google Scholar
Meyers, SL, Jennings, KM, Schultheis, JR, Monks, DW (2010) Evaluation of flumioxazin and S-metolachlor rate and timing for Palmer amaranth (Amaranthus palmeri) control in sweetpotato. Weed Technol 24:495–503 Google Scholar
Meyers, SL, Jennings, KM, Monks, DW (2012) Response of sweetpotato cultivars to S-metolachlor rate and application time. Weed Technol 26:474–479 Google Scholar
Meyers, SL, Jennings, KM, Monks, DW (2013a) Herbicide-based weed management programs for Palmer amaranth (Amaranthus palmeri) in sweetpotato. Weed Technol 27:331–340 Google Scholar
Meyers, SL, Jennings, KM, Monks, DW, Miller, DK, Shankle, MW (2013b) Rate and application timing effects on tolerance of ‘Covington’ sweetpotato to S-metolachlor. Weed Technol 27:729–734 Google Scholar
Monks, DW, Shankle, MW, Jennings, KM, Meyers, SL (2013) Herbicide injury. Pages 118–119 in Clark CA, Ferrin DM, Smith TP & Holmes GJ eds. Compendium of Sweetpotato Diseases, Pests, and Disorders 2nd edn. St. Paul, MN: The American Phytopathological Society Google Scholar
Motsenbocker, CE, Monaco, TJ (1993) Differential tolerance of sweet potato (Ipomoea batatas) clones to metribuzin. Weed Technol 7:349–354 Google Scholar
[NCDA and CS] North Carolina Department of Agriculture & Consumer Services. (2016) North Carolina Agricultural Statistics 2015. Raleigh, NC: NC Department of Agriculture Google Scholar
Seem, JE, Creamer, NG, Monks, DW (2003) Critical weed-free period for ‘Beauregard’ sweetpotato (Ipomoea batatas). Weed Technol 17:686–695 Google Scholar
Shaner, DL ed. (2014) Herbicide Handbook. 10th edn. Lawrence, KS: Weed Science Society of America. Pp 308–310:327–328 Google Scholar
[USDA] U.S. Department of Agriculture. (2005) United States Standards for Grades of Sweet Potatoes. Washington, DC: U.S. Department of Agriculture Google Scholar