Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-19T13:27:52.410Z Has data issue: false hasContentIssue false
  • English
  • Français

Competitiveness with Weeds of Soybean Cultivars with Different Maturity and Canopy Width Characteristics

Published online by Cambridge University Press:  20 January 2017

Dawn E. Nordby ,
Dustin L. Alderks  and
Emerson D. Nafziger
Dawn E. Nordby*
Affiliation:
Department of Crop Sciences, University of Illinois, Urbana, IL 61801
Dustin L. Alderks
Affiliation:
Department of Crop Sciences, University of Illinois, Urbana, IL 61801
Emerson D. Nafziger
Affiliation:
Department of Crop Sciences, University of Illinois, Urbana, IL 61801
*
Corresponding author's E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Field studies were conducted in 2005 at five locations throughout Illinois to determine the effect of maturity date and canopy width characteristics of selected glyphosate-resistant soybean cultivars on competitive ability against weeds. Natural weed populations at all sites were allowed to compete with the soybean cultivars until the V1, V3, V5, or V7 growth stage and then removed with an application of glyphosate. Light-interception readings, weed control ratings, and soybean yield were all measured to compare cultivars. Cultivars of later maturities tended to withstand early season weed competition better and attained higher yields when weeds were removed at later timings than those of earlier maturity. Although canopy width differed moderately among cultivars in some cases, canopy width had no effect on the ability of soybeans to compete with weeds. Thus, choosing soybean cultivars of later maturity might provide more flexibility in weed management and might reduce losses due to weeds, but that benefit needs to be balanced with yield potential.

Keywords

Glyphosatemetolachlormetribuzinsoybean, Glycine max (L.) MerrApplication timingweed-free period
Type
Research
Information
Weed Technology , Volume 21 , Issue 4 , December 2007 , pp. 1082 - 1088
Copyright
Copyright © Weed Science Society of America 

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.)

References

Literature Cited

Board, J. E. 2004. Soybean cultivar differences in light interception and leaf area index during seed filling. Agron J. 96:305–310.Google Scholar
Dalley, C. D., Kells, J. J., and Renner, K. A. 2004. Effect of glyphosate application timing and row spacing on corn (Zea mays) and soybean (Glycine max) yields. Weed Technol. 18:165–176.Google Scholar
Delannay, X., Bauman, T. T., and Beighley, D. H. 1995. Yield evaluation of a glyphosate-tolerant soybean line after treatment with glyphosate. Crop Sci. 35:1461–1467.CrossRefGoogle Scholar
Essah, S. Y. C. and Bishnoi, U. R. 2003. Glyphosate application timing effects on seed yield and yield components of glyphosate-resistant soybeans. Crop Res. (Hisar) 26:1–16.Google Scholar
Knezevic, S. Z., Evans, S. P., and Mainz, M. 2003. Row spacing influences the critical timing of weed removal in soybean (Glycine max). Weed Technol. 17:666–673.Google Scholar
Krausz, R. F., Young, B. G., Kaputsa, G., and Matthews, J. L. 2001. Influence of weed competition and herbicides on glyphosate-resistant soybean (Glycine max). Weed Technol. 15:530–534.CrossRefGoogle Scholar
Mulgeta, D. and Boerboom, C. M. 2000. Critical time of weed removal in glyphosate-resistant Glycine max . Weed Sci. 48:35–42.Google Scholar
Padgette, S. R., Kolacz, K. H., and Delannay, X. 1995. Development, identification, and characterization of a glyphosate-tolerant soybean line. Crop Sci. 35:1451–1461.Google Scholar
Pedersen, P. 2004. How a Soybean Plant Develops. Ames, IA Iowa State University, Iowa Cooperative Extension Service PM1945.Google Scholar
Ralston, J. L. and Witt, W. W. 1998. Comparison of postemergence broadleaf herbicides in glyphosate-tolerant and glyphosate-susceptible soybeans. Weed Sci. Soc. Am. Abstr. 38:7. [Abstract].Google Scholar
Ritchie, S. W., Hanway, J. J., Thompson, H. E., and Benson, G. O. 1997. How a Soybean Plant Develops. Ames, IA Iowa State University of Science and Technology Cooperative Extension Service Special Report 53.Google Scholar
Rose, S. J., Burnside, O. C., Specht, J. E., and Swisher, B. A. 1984. Competition and allelopathy between soybeans and weeds. Agron. J. 76:523–528.Google Scholar
SAS 2003. SAS User's Guide. Version 9.1. Cary, NC SAS Institute.Google Scholar
Singer, J. W. 2001. Soybean light interception and yield response to row spacing and biomass removal. Crop Sci. 41:424–429.CrossRefGoogle Scholar
[USDA/NASS] U.S. Department of Agriculture, National Agricultural Statistics Service 2005. Crop Production–Acreage. http://nass.usda.gov. Accessed: February 9, 2006.Google Scholar
VanGessel, M. J., Ayeni, A. O., and Majek, B. A. 2000. Optimum glyphosate timing with and without residual herbicides in glyphosate-resistant soybean (Glycine max) under full season conventional tillage. Weed Technol. 14:140–149.Google Scholar