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Weed Management in Glyphosate- and Glufosinate-Resistant Sugar Beet

  • Nathan J. Kemp (a1), Erin C. Taylor (a1) and Karen A. Renner (a1)


Field experiments were conducted to determine the critical period of weed interference in glyphosate- and glufosinate-resistant sugar beet, and to determine if PRE herbicides increased weed control or sugar beet root yield when glufosinate, glyphosate, or conventional POST herbicides were applied. Glyphosate- and glufosinate-resistant sugar beet root yields were reduced by up to 66 and 67%, respectively, when weeds remained all season in the weedy control treatment compared with yields when weed removal occurred as soon as the weeds were 2.5 cm tall, approximately 2 to 3 wk after planting (WAP). A critical period of weed interference did not occur in this research. The critical time of weed removal was approximately 8 WAP in 1998 and beyond 11 WAP in 1999. Weeds averaged 20 cm in height at 8 WAP and weed densities were greater in 1998 compared with 1999. The critical weed-free period for glyphosate- and glufosinate-resistant sugar beet was 4.5 to 5 WAP in 1998. In 1999, the critical weed-free period at the Michigan Sugar location was 1.5 WAP in glyphosate-resistant sugar beet, and 6.5 WAP in glufosinate-resistant sugar beet for the Michigan Sugar site. Glyphosate or glufosinate POST provided better weed control and resulted in greater sugar beet root yield compared with conventional POST herbicides when data were combined over PRE herbicide treatments. PRE herbicides improved the control of common lambsquarters and Amaranthus species in some of the site-years when data were combined over POST treatments, but sugar beet yield did not increase. Our research suggests that PRE herbicides will not be necessary in glyphosate- or glufosinate-resistant sugar beet. To avoid sugar beet yield loss, multiple POST applications of glyphosate or glufosinate will be needed until 6 to 9 WAP to prohibit yield loss from weeds emerging after the last POST application.


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Alford, C. M., Miller, S. D., and Cecil, J. T. 2004. Using row spacing to increase crop competition with weeds. In Fischer, T., et al New directions for a diverse planet: Proceedings for the 4th International Crop Science Congress, Brisbane, Australia. Accessed: May 19, 2008.
Clayton, G. W., Harker, K. N., O'Donovan, J. T., Baig, M. N., and Kidnie, M. J. 2002. Glyphosate timing and tillage system effects on glyphosate-resistant canola (Brassica napus). Weed Technol 16:124130.
Dale, T. M. and Renner, K. A. 2005. Timing of micro-rate applications based on growing degree days in sugarbeet. J. Sugar Beet Res 42:87102.
Dale, T. M., Renner, K. A., and Kravchenko, A. N. 2006. Effect of herbicides on weed control and sugarbeet (Beta vulgaris) yield and quality. Weed Technol 20:150156.
Dalley, C. D., Kells, J. J., and Renner, K. A. 2004. Effect of glyphosate application timing and row spacing on corn and soybean yields. Weed Technol 18:165176.
Dexter, A. G. and Luecke, J. L. 1998. Special survey on micro-rate, 1998. Sugarbeet Res. Ext. Rep 29:6475.
Dill, G. M. 2005. Glyphosate-resistant crops: history, status, and future. Pest Manag. Sci 61:219224.
Evans, S. P., Knezevic, S. Z., Lindquist, J. L., Shapiro, C. A., and Blankenship, E. E. 2003. Nitrogen application influences the critical period for weed control in corn. Weed Sci 51:408417.
Everman, W. J., Clewis, S. B., Thomas, W. E., Burke, I. C., and Wilcut, J. W. 2008. Critical period of weed interference in peanut. Weed Technol 22:6367.
Gower, S. A., Loux, M. M., Cardina, J., Harrison, S. K., Sprankle, P. L., Probst, N. J., Bauman, T. T., Bugg, W., Curran, W. S., Currie, R. S., Harvey, R. G., Johnson, W. G., Kells, J. J., Owen, M. D. K., Regehr, D. L., Slack, C. H., Spaur, M., Sprague, C. L., Vangessel, M., and Young, B. G. 2003. Effect of postemergence glyphosate application timing on weed control and grain yield in glyphosate-resistant corn: results of a 2-yr multistate study. Weed Technol 17:821828.
Guza, C. J., Ransom, C. V., and Mallory-Smith, C. 2002. Weed control in glyphosate-resistant sugarbeet (Beta vulgaris L.). J. Sugar Beet Res 39:109123.
Hall, M. R., Swanton, C. J., and Anderson, G. W. 1992. The critical period of weed control in grain corn (Zea mays). Weed Sci 40:441447.
Hewson, R. T. and Roberts, H. A. 1973. Effects of weed competition for different periods on the growth and yield of red beet. J. Hortic. Sci 48:281292.
Knezevic, S. Z., Evans, S. P., Blankenship, E. E., Van Acker, R. C., and Lindquist, J. L. 2002. Critical period for weed control: the concept and data analysis. Weed Sci 50:773786.
Kniss, A. R., Wilson, R. G., Martin, A. R., Burgener, P. A., and Feuz, D. M. 2004. Economic evaluation of glyphosate-resistant and conventional sugar beet. Weed Technol 18:388396.
Lindquist, J. L., Mortensen, D. A., Clay, S. A., Schmenk, R., Kells, J. J., Howatt, K., and Westra, P. 1996. Stability of corn (Zea mays)–velvetleaf (Abutilon theophrasti) interference relationships. Weed Sci 44:309313.
Mesbah, A., Miller, S. D., Fornstrom, K. J., and Legg, D. E. 1994. Kochia (Kochia scoparia) and green foxtail (Setaria viridis) interference in sugarbeets (Beta vulgaris). Weed Technol 8:754759.
Mesbah, A., Miller, S. D., Fornstrom, K. J., and Legg, D. E. 1995. Wild mustard (Brassica kaber) and wild oat (Avena fatua) interference in sugarbeets (Beta vulgaris). Weed Technol 9:4952.
Mulgata, D. and Boerboom, C. 2000. Critical time of weed removal in glyphosate-resistant Glycine max . Weed Sci 48:3542.
Nelson, K. A. and Renner, K. A. 1999. Cost-effective weed management in wide- and narrow-row glyphosate resistant soybean. J. Prod. Agric 12:460465.
Pline-Smic, W. 2005. Technical performance of some commercial glyphosate-resistant crops. Pest Manag. Sci 61:225234.
Schweizer, E. E. 1981. Broadleaf interference in sugarbeets (Beta vulgaris). Weed Sci 29:128133.
Schweizer, E. E. 1983. Common lambsquarters (Chenopodium album) interference in sugarbeets (Beta vulgaris). Weed Sci 31:58.
Schweizer, E. E. and Lauridson, T. C. 1985. Powell amaranth (Amaranth powellii) interference in sugarbeets (Beta vulgaris). Weed Sci 33:518520.
Van Acker, R. C., Swanton, C. J., and Weise, S. F. 1993. The critical period of weed control in soybean [Glycine max (L.) Merr.]. Weed Sci 41:194200.
Wilson, R. G., Yonts, C. D., and Smith, J. A. 2002. Influence of glyphosate and glufosinate on weed control and sugarbeet (Beta vulgaris) yield in herbicide-tolerant sugarbeet. Weed Technol 16:6673.
Zimdahl, R. L. 2004. Weed–crop competition: A review. Ames, IA: Blackwell Publishing Professional. 220.


Weed Management in Glyphosate- and Glufosinate-Resistant Sugar Beet

  • Nathan J. Kemp (a1), Erin C. Taylor (a1) and Karen A. Renner (a1)


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