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Influence of Glyphosate/Dicamba Application Rate and Timing on the Control of Glyphosate-Resistant Horseweed in Glyphosate/Dicamba-Resistant Soybean

Published online by Cambridge University Press:  04 December 2018

Brittany K. Hedges ,
Nader Soltani ,
David C. Hooker ,
Darren E. Robinson  and
Peter H. Sikkema
Brittany K. Hedges
Affiliation:
Graduate Student, Department of Plant Agriculture, University of Guelph, Ridgetown, ON, Canada
Nader Soltani*
Affiliation:
Adjunct Professor, Department of Plant Agriculture, University of Guelph, Ridgetown, ON, Canada
David C. Hooker
Affiliation:
Associate Professor, Department of Plant Agriculture, University of Guelph, Ridgetown, ON, Canada
Darren E. Robinson
Affiliation:
Associate Professor, Department of Plant Agriculture, University of Guelph, Ridgetown, ON, Canada
Peter H. Sikkema
Affiliation:
Professor, Department of Plant Agriculture, University of Guelph, Ridgetown, ON, Canada
*
Author for correspondence: Nader Soltani, Department of Plant Agriculture, University of Guelph Ridgetown Campus, Ridgetown, ON N0P 2C0, Canada. (Email: [email protected])
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Abstract

Dicamba may be an efficacious option for the control of glyphosate-resistant (GR) horseweed in glyphosate/dicamba-resistant soybean; research is needed to optimize the application rate based on horseweed height at the time of application. The purpose of this study was to determine the effect of glyphosate/dicamba rate and application timing for the control of GR horseweed. Glyphosate/dicamba was applied at three rates (900, 1,350, and 1,800 g ae ha−1) at three horseweed application timings (5, 15, and 25 cm) in a factorial design. There was no interaction between glyphosate/dicamba rate and timing for GR horseweed control or soybean yield; however, there was an interaction for GR horseweed density and biomass. At 2 and 4 wk after application (WAA), there was a decrease in GR horseweed control as the height at the time application increased. At 4 WAA, the application of glyphosate/dicamba to GR horseweed that was 5-, 15-, and 25-cm tall provided 87%, 76%, and 62% control, respectively. There was no impact of glyphosate/dicamba application timing on soybean yield. At 2, 4, and 8 WAA, there was an increase in GR horseweed control as the rate of glyphosate/dicamba was increased. At 8 WAA, glyphosate/dicamba applied at 900, 1,350, and 1,800 g ae ha−1 controlled GR horseweed 76%, 87%, and 92%, respectively. Earlier application timings and higher rates of glyphosate/dicamba caused the greatest reduction in GR horseweed density and biomass. Reduced GR horseweed competition resulted in a 100% to 144% increase in soybean yield, but there was no difference in soybean yield among glyphosate/dicamba rates tested.

Keywords

William Johnson, Purdue UniversityDicambaglyphosatehorseweed, Erigeron canadensis L. Cronq.soybean, Glycine max (L.) Merr.Canada fleabaneglyphosate resistanceheightrate
Type
Research Article
Information
Weed Technology , Volume 32 , Issue 6 , December 2018 , pp. 678 - 682
Copyright
© Weed Science Society of America, 2018. 

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References

Bruce, JA, Kells, JJ (1990) Horseweed (Conyza canadensis) control in no-tillage soybeans (Glycine max) with pre-plant and preemergence herbicides. Weed Technol 4:642–647 Google Scholar
Budd, CM (2016) Improving the Consistency of Glyphosate-Resistant Canada Fleabane (Conyza canadensis) Control with Saflufenacil: Distribution and Control in Soybean (Glycine max). M.Sc thesis, University of Guelph, Guelph, ON, Canada. 51 pGoogle Scholar
Budd, CM, Soltani, N, Robinson, DE, Hooker, DC, Miller, RT, Sikkema, PH (2016) Control of glyphosate resistant Canada fleabane with saflufenacil plus tankmix partners in soybean. Can J Plant Sci 96:989–994 Google Scholar
Burnside, OC, Lavy, TL (1966) Dissipation of dicamba. Weed Sci 14:211–214 Google Scholar
Byker, HP, Soltani, N, Robinson, DE, Tardif, FJ, Lawton, MB, Sikkema, PH (2013) Occurrence of glyphosate and cloransulam resistant Canada fleabane (Conyza canadensis L. Cronq.) in Ontario. Can J Plant Sci 93:851–855 Google Scholar
Cobb, AH, Reade, JP (2010) Herbicides and Plant Physiology. 2nd ed. Hoboken, NJ: Wiley. 296 pGoogle Scholar
Dauer, JT, Mortensen, DA, Humston, R (2006) Controlled experiments to predict horseweed (Conyza canadensis) dispersal distances. Weed Sci 54:484–489 Google Scholar
Dill, GM (2005) Glyphosate-resistant crops: history, status and future. Pest Manag Sci 61:219–224 Google Scholar
Duke, SO, Powles, SB (2008) Glyphosate: a once-in-a-century herbicide. Pest Manag Sci 64:319–325 Google Scholar
Franz, JE, Mao, MK, Sikorski, JA (1997) Glyphosate: A Unique Global Herbicide (ACS Monograph 189). Washington, DC: American Chemical Society. 653 pGoogle Scholar
Hartzler, RG, Singer, JW, Kohler, KA, Buhler, DD (2006) Effect of repeated glyphosate use on weed communities in a soybean–corn rotation. Crop Manag, 10.1094/CM-2006-0308-01-RS Google Scholar
Heap, I (2018) The International Survey of Herbicide Resistant Weeds. www.weedscience.org. Accessed: February 16, 2018 Google Scholar
Kruger, GR, Davis, VM, Weller, SC, Johnson, WG (2010) Control of horseweed (Conyza canadensis) with growth regulator herbicides. Weed Technol 24:425–429 Google Scholar
Loux, M, Stachler, J, Johnson, B, Nice, G, Davis, V, Nordby, D (2006) Biology and Management of Horseweed. Purdue University Extension. https://www.extension.purdue.edu/extmedia/gwc/gwc-9-w.pdf. Accessed: February 16, 2018 Google Scholar
Main, CL, Steckel, LE, Hayes, RM, Mueller, TC (2006) Biotic and abiotic factors influence horseweed emergence. Weed Sci 54:1101–1105 Google Scholar
Mellendorf, TG, Young, JM, Matthews, JL, Young, BG (2013) Influence of plant height and glyphosate on saflufenacil efficacy on glyphosate-resistant horseweed (Conyza canadensis). Weed Technol 27:463–467 Google Scholar
Nandula, VK, Eubank, TW, Poston, DH, Koger, CH, Reddy, KN (2006) Factors affecting germination of horseweed (Conyza canadensis). Weed Sci 54:898–902 Google Scholar
Shaner, DL (2014) Dicamba. Herbicide Handbook. 10th ed. Lawrence, KS: Weed Science Society of America. pp 139–141 Google Scholar
Smith, AE (1973) Degradation of dicamba in prairie soils. Weed Res 13:373–378 Google Scholar
Tozzi, E, Beckie, H, Weiss, R, Gonzalez-Andujar, JL, Storkey, J, Cici, SZH, Van Acker, RC (2014) Seed germination response to temperature for a range of international populations of Conyza canadensis . Weed Res 54:178–185 Google Scholar
Tozzi, E, Van Acker, RC (2014) Effects of seedling emergence timing on the population dynamics of horseweed (Conyza canadensis var. canadensis). Weed Sci 62:451–456 Google Scholar
Van Acker, RC, Swanton, CJ, Weise, SF (1993) The critical period of weed control in soybean [Glycine max (L.) Merr.]. Weed Sci 41:194–200 Google Scholar
VanGessel, MJ (2001) Glyphosate-resistant horseweed from Delaware. Weed Sci 49:703–705 Google Scholar