Hostname: page-component-848d4c4894-nr4z6 Total loading time: 0 Render date: 2024-05-18T05:16:09.640Z Has data issue: false hasContentIssue false

Integrated management of glyphosate-resistant horseweed (Erigeron canadensis) with tillage and herbicides in soybean

Published online by Cambridge University Press:  30 August 2019

Parminder S. Chahal
Postdoctoral Research Scientist, Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, USA
Amit J. Jhala*
Associate Professor, Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, USA
Author for correspondence: Amit J. Jhala, Associate Professor, Department of Agronomy and Horticulture, University of Nebraska-Lincoln, 279 Plant Science Hall, PO Box 830915, Lincoln, NE 68583. Email:


Glyphosate-resistant (GR) horseweed is one of the most common and troublesome weeds in soybean production fields in several states in the United States, including Nebraska. The evolution of horseweed resistant to several herbicide sites of action has prioritized an integrated approach, including tillage, for effective management of this problem weed. The objectives of this study were to evaluate the effect of tillage or herbicide applied in fall or spring followed by a PRE, POST, and PRE followed by a POST herbicide program for GR horseweed control as well as GR soybean injury and yield in Nebraska. Field studies were established in the fall 2014–2015 and 2015–2016 growing seasons using a factorial randomized complete block design with shallow tillage or herbicide applied at different timings as two factors. Shallow tillage was accomplished using a 50-cm-wide rototiller operated at a depth of 10 cm. At soybean harvest, tillage applied the previous year in fall or spring without any follow-up herbicide treatment provided 79% to 88% horseweed control compared with 27% and 56% control with 2,4-D plus carfentrazone applied in fall and spring, respectively. Tillage or herbicide applied in fall or spring followed by a PRE, POST, or PRE and POST herbicide provided 82% to 99% GR horseweed control at soybean harvest. Soybean yield in this study was similar in most treatments. Tillage or herbicide applied in fall or spring provided similar horseweed control and soybean yield when followed by a PRE, POST, or PRE and POST herbicide; therefore, fall- or spring-applied herbicides can be rotated with shallow tillage for integrated season-long horseweed management.

Research Article
© Weed Science Society of America, 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)


Bhowmik, PC, Bekech, MM (1993) Horseweed (Conyza canadensis) seed production, emergence, and distribution in no-tillage and conventional-tillage corn (Zea mays). Agron Trends Agric Sci 1:6771 Google Scholar
Brown, SM, Whitwell, T (1988) Influence of tillage on horseweed, Conyza canadensis . Weed Technol 2:269270 CrossRefGoogle Scholar
Bruce, JA, Kells, JJ (1990) Horseweed (Conyza canadensis) control in no-tillage soybeans (Glycine max) with preplant and preemergence herbicides. Weed Technol 4:642647 CrossRefGoogle Scholar
Buhler, DD (1992) Population dynamics and control of annual weeds in corn (Zea mays) as influenced by tillage systems. Weed Sci 40:241248 CrossRefGoogle Scholar
Buhler, DD, Owen, MDK (1997) Emergence and survival of horseweed (Conyza canadensis). Weed Sci 45:98101 CrossRefGoogle Scholar
Byker, HP, Soltani, N, Robinson, DE, Tardif, FJ, Lawton, MB, Sikkema, PH (2013a) Control of glyphosate-resistant horseweed (Conyza canadensis) with dicamba applied preplant and postemergence in dicamba-resistant soybean. Weed Technol 27:492496 CrossRefGoogle Scholar
Byker, HP, Soltani, N, Robinson, DE, Tardif, FJ, Lawton, MB, Sikkema, PH (2013b) Occurrence of glyphosate and cloransulam resistant Canada fleabane (Conyza canadensis L. Cronq.) in Ontario. Can J Plant Sci 93:851855 CrossRefGoogle Scholar
Chahal, PS, Jhala, AJ (2015) Herbicide programs for control of glyphosate-resistant volunteer corn in glufosinate-resistant soybean. Weed Technol 29:431443 CrossRefGoogle Scholar
Chahal, PS, Jhala, AJ (2018) Economics of management of photosystem II- and HPPD-inhibitor-resistant Palmer amaranth in corn. Agron J 110:19051914 CrossRefGoogle Scholar
Chahal, PS, Irmak, S, Gaines, T, Amundsen, K, Jugulam, M, Jha, P, Travlos, IS, Jhala, AJ (2018) Control of photosystem II– and 4-hydroxyphenylpyruvate dioxygenase inhibitor–resistant Palmer amaranth (Amaranthus palmeri) in conventional corn. Weed Technol 32:326335 CrossRefGoogle Scholar
Comes, RD, Bruns, VF, Kelley, AD (1978) Longevity of certain weed and crop seeds in fresh water. Weed Sci 26:336344 CrossRefGoogle Scholar
Davis, VM, Johnson, WG (2008) Glyphosate-resistant horseweed (Conyza canadensis) emergence, survival, and fecundity in no-till soybean. Weed Sci 56:231236 CrossRefGoogle Scholar
Davis, VM, Gibson, KD, Bauman, TT, Weller, SC, Johnson, WG (2009) Influence of weed management practices and crop rotation on glyphosate-resistant horseweed (Conyza canadensis) population dynamics and crop yield-years III and IV. Weed Sci 57:417426 CrossRefGoogle Scholar
Davis, VM, Kruger, GR, Young, BG, Johnson, WG (2010) Fall and spring preplant herbicide applications influence spring emergence of glyphosate-resistant horseweed (Conyza canadensis). Weed Technol 24:1119 CrossRefGoogle Scholar
Eubank, TW, Poston, DH, Nandula, VK, Koger, CH, Shaw, DR, Reynolds, DB (2008) Glyphosate-resistant horseweed (Conyza canadensis) control using glyphosate-, paraquat-, and glufosinate-based herbicide programs. Weed Technol 22:1621 CrossRefGoogle Scholar
Fulton, JP, Wells, LG, Shearer, SA, Barnhisel, RI (1996) Spatial variation of soil physical properties: a precursor to precision tillage. Presented at American Society of Agricultural Engineers International Meeting, Phoenix, AZ, July 14–18, 1996. Paper no. 96-1002Google Scholar
Ganie, ZA, Jhala, AJ (2017) Glyphosate-resistant common ragweed (Ambrosia artemisiifolia) in Nebraska: confirmation and response to postemergence corn and soybean herbicides. Weed Technol 31:225237 CrossRefGoogle Scholar
Gianessi, LP (2005) Economic and herbicide use impacts of glyphosate-resistant crops. Pest Manag Sci 61:241245 CrossRefGoogle ScholarPubMed
Gilley, JE, Doran, JW (1997) Tillage effects on soil erosion potential and soil quality of a former conservation reserve program site. J Soil Water Conserv 52:184188 Google Scholar
Heap, I (2019) Herbicide resistant weeds by species and site of action. *****HRAC Group Codes*****. Accessed: August 13, 2019Google Scholar
Kapusta, G (1979) Seedbed tillage and herbicide influence on soybean [Glycine max (L.) Merr.] weed control and yield. Weed Sci 27:520526.CrossRefGoogle Scholar
Knezevic, SZ (2007) Glyphosate resistance worldwide and in Nebraska. CropWatch, Lincoln, NE: University of Nebraska–Lincoln. Accessed: July 18, 2019Google Scholar
Knezevic, SZ, Creech, CF, Jhala, AJ, Klein, RN, Kruger, GR, Proctor, CA, Shea, PJ, Ogg, CL, Thompson, C, Lawrence, N, Werle, R (2015) 2015 Guide for Weed, Disease, and Insect Management in Nebraska. Lincoln, NE: University of Nebraska–Lincoln.Google Scholar
Kruger, GR, Davis, VM, Weller, SC, Johnson, WG (2010) Control of horseweed (Conyza canadensis) with growth regulator herbicides. Weed Technol 24:425429 CrossRefGoogle Scholar
Loux, M, Stachler, J, Johnson, B, Nice, G, Davis, V, Nordby, D (2006) Biology and Management of Horseweed. Purdue Extension Publication GWC-9. West Lafayette, IN: Purdue Extension. Pp. 111 Google Scholar
Nandula, VK, Eubank, TW, Poston, DH, Koger, CH, Reddy, KN (2006) Factors affecting germination of horseweed (Conyza canadensis). Weed Sci 54:898902 CrossRefGoogle Scholar
Owen, LN, Steckel, LE, Koger, CH, Main, CL, Mueller, TC (2009) Evaluation of spring and fall burndown application timings on control of glyphosate-resistant horseweed (Conyza canadensis) in no-till cotton. Weed Technol 23:335339 CrossRefGoogle Scholar
Raper, RL, Reeves, DW, Burmester, CH, Schwab, EB (2000) Tillage depth, tillage timing, and cover crop effects on cotton yield, soil strength, and tillage energy requirements. Appl Eng Agric 16:379385 CrossRefGoogle Scholar
Regehr, DL, Bazzaz, FA (1979) The population dynamics of horseweed, a successional winter annual. J Ecol 67:923933 CrossRefGoogle Scholar
Sarangi, D, Jhala, AJ (2018). A statewide survey of stakeholders to assess the problem weeds and weed management practices in Nebraska. Weed Technol 32:642655 CrossRefGoogle Scholar
Scott, R, Shaw, DR, Barrentine, WL (1998) Glyphosate tank mixtures with SAN 582 for burndown or postemergence applications in glyphosate-tolerant soybean (Glycine max). Weed Technol 12:2326 CrossRefGoogle Scholar
Scott, BA, VanGessel, MJ (2007) Delaware soybean grower survey on glyphosate-resistant horseweed (Conyza canadensis). Weed Technol 21:270274 CrossRefGoogle Scholar
Thompson, MA, Steckel, LE, Ellis, AT, Mueller, TC (2007) Soybean tolerance to early preplant applications of 2,4-D ester, 2,4-D amine, and dicamba. Weed Technol 21:882885 CrossRefGoogle Scholar
Trainer, GD, Loux, MM, Harrison, SK, Regnier, E (2005) Response of horseweed biotypes to foliar applications of cloransulam-methyl and glyphosate. Weed Technol 19:231236 CrossRefGoogle Scholar
VanGessel, MJ, Scott, BA, Johnson, QR, White-Hansen, SE (2009) Influence of glyphosate-resistant horseweed (Conyza canadensis) growth stage on response to glyphosate applications. Weed Technol 23:4953 CrossRefGoogle Scholar
Van Wychen, L (2016) 2016 survey of the most common and troublesome weeds in broadleaf crops, fruits, and vegetables in the United States and Canada. Weed Science Society of America National Weed Survey Dataset. Accessed: February 19, 2019Google Scholar
Wilson, HP, Hines, TE, Bellinder, RR, Grande, JA (1985) Comparisons of HOE-39866, SC-0224, paraquat and glyphosate in no-till corn (Zea mays). Weed Sci 33:531536 CrossRefGoogle Scholar
Wilson, JS, Worsham, AD (1988) Combinations of nonselective herbicides for difficult to control weeds in no-till corn (Zea mays) and soybeans (Glycine max). Weed Sci 36:648652 CrossRefGoogle Scholar