Skip to main content Accessibility help

Evaluation of Glyphosate-Resistant Hard Red Spring Wheat (Triticum aestivum)

  • Kirk A. Howatt (a1), Gregory J. Endres (a2), Paul E. Hendrickson (a2), Ezra Z. Aberle (a2), John R. Lukach (a3), Brian M. Jenks (a4), Neil R. Riveland (a5), Stephen A. Valenti (a6) and Craig M. Rystedt (a6)...


The potential for future commercialization of glyphosate-resistant wheat necessitates evaluation of agronomic merits of this technology. Experiments were established to evaluate glyphosate-resistant wheat and weed responses to glyphosate rate, application timing, and tank mixtures. Glyphosate at 1,680 g/ha did not injure wheat. Wheat response to glyphosate applied to one- to three- or three- to five-leaf wheat was not different from that of untreated wheat. Wheat was injured more from glyphosate plus thifensulfuron or glyphosate plus dicamba than from individual herbicides at one of six locations, but grain yield was not affected by glyphosate tank mixtures. Glyphosate application timing did not affect control of wild oat or common lambsquarters 56 d after treatment. Glyphosate when applied to one- to three-leaf wheat provided better control of wild buckwheat than later glyphosate application, whereas glyphosate applied to three- to five-leaf wheat provided the best control of green and yellow foxtail, redroot pigweed, and Canada thistle. Weed control with glyphosate tended to be better than with conventional herbicides, and wheat treated with glyphosate produced approximately 10% more grain than wheat treated with conventional herbicide tank mixes.


Corresponding author

Corresponding author's E-mail:


Hide All
Blackshaw, E. B. and Harker, K. N. 2002. Selective weed control with glyphosate in glyphosate-resistant spring wheat (Triticum aestivum). Weed Technol. 16:885892.
Burnside, O. C. 1992. Rationale for developing herbicide resistant crops. Weed Technol. 6:621625.
Clayton, G. W., Harker, K. N., O'Donovan, J. T., Baig, M. N., and Kidnie, M. J. 2002. Glyphosate timing and tillage effects on glyphosate-resistant canola (Brassica napus). Weed Technol. 16:124130.
Dernoeden, P. H. and Fidanza, M. A. 1994. Fenoxaprop-P activity influenced by auxin-like herbicide application timing. Hortscience 29:15181519.
Donald, W. W. and Khan, M. 1996. Canada thistle (Cirsium arvense) effects on yield components of spring wheat (Triticum aestivum). Weed Sci. 44:114121.
Durgan, B. R., Yenish, J. P., Daml, R. J., and Miller, D. W. 1997. Broadleaf weed control in hard red spring wheat (Triticum aestivum) with F8426. Weed Technol. 11:489495.
Harker, K. N., Blackshaw, R. E., and Kirkland, K. J. 1995. Ethametsulfuron interactions with grass herbicides on canola (Brassica napus, B. rapa). Weed Technol. 9:9198.
Holm, F. A., Kirkland, K. J., and Stevenson, F. C. 2000. Defining optimum herbicide rates and timing for wild oat (Avena fatua) control in spring wheat (Triticum aestivum). Weed Technol. 14:167175.
Johnson, W. G., Bradley, P. R., Hart, S. E., Buesinger, M. L., and Massey, R. E. 2000. Efficacy and economics of weed management in glyphosate-resistant corn (Zea mays). Weed Technol. 14:5765.
Kirkland, K. J. 1993. Spring wheat (Triticum aestivum) growth and yield as influenced by duration of wild oat (Avena fatua) competition. Weed Technol. 7:890893.
LeBaron, H. M. 1990. Weed science in the 1990s: will it be forward or in reverse. Weed Technol. 4:671689.
Lich, J. M., Renner, K. A., and Penner, D. 1997. Interaction of glyphosate with postemergence soybean (Glycine max) herbicides. Weed Sci. 45:1221.
Lockhart, S. J. and Howatt, K. A. 2004. Split applications of herbicides at reduced rates can effectively control wild oat (Avena fatua) in wheat (Triticum aestivum). Weed Technol. 18:369374.
Padgette, S. R., Kolacz, K. H., Delannay, X., Re, D. B., LaVallee, B. J., Tinius, C. N., Rhodes, W. K., Otero, Y. I., Barry, G. F., and Eichholtz, D. A. 1995. Development, identification, and characterization of a glyphosate-tolerant soybean line. Crop Sci. 35:14511461.
Powles, S. B., Lorraine-Colwill, D. F., Dellow, J. J., and Preston, C. 1998. Evolved resistance to glyphosate in rigid ryegrass (Lolium rigidum) in Australia. Weed Sci. 46:604607.
Ramsdale, B. K. and Messersmith, C. G. 2002. Low-rate split-applied herbicide treatments for wild oat (Avena fatua) control in wheat (Triticum aestivum). Weed Technol. 16:149155.
Shaner, D. L. 2000. The impact of glyphosate-tolerant crops on the use of other herbicides and on resistance management. Pest Manage. Sci. 56:320326.
Spandl, E., Durgan, B. R., and Forcella, F. 1999. Foxtail (Setaria spp.) seedling dynamics in spring wheat (Triticum aestivum) are influenced by seeding date and tillage time. Weed Sci. 47:156160.
Stahlman, P. W., Currie, R. S., and El-Hamid, M. A. 1997. Nitrogen carrier and surfactant increase foliar herbicide injury in winter wheat (Triticum aestivum). Weed Technol. 11:712.
Tal, A., Romano, M. L., Stephenson, G. R., Schwan, A. L., and Hall, J. C. 1993. Glutathione conjugation: a detoxification pathway for fenoxaprop-P-ethyl in barley, crabgrass, oat, and wheat. Pestic. Biochem. Physiol. 46:190199.
VanGessel, M. J. 2001. Glyphosate-resistant horseweed from Delaware. Weed Sci. 49:703705.
Zhang, J., Hamill, A. S., and Weaver, S. E. 1995. Antagonism and synergism between herbicides: trends from previous studies. Weed Technol. 9:8690.


Related content

Powered by UNSILO

Evaluation of Glyphosate-Resistant Hard Red Spring Wheat (Triticum aestivum)

  • Kirk A. Howatt (a1), Gregory J. Endres (a2), Paul E. Hendrickson (a2), Ezra Z. Aberle (a2), John R. Lukach (a3), Brian M. Jenks (a4), Neil R. Riveland (a5), Stephen A. Valenti (a6) and Craig M. Rystedt (a6)...


Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.