Skip to main content Accessibility help

Herbicide Options for Controlling Glyphosate-Tolerant Corn in a Corn Replant Situation

  • Lawrence E. Steckel (a1), M. Angela Thompson (a1) and Robert M. Hayes (a1)


In the spring of 2007, a widespread freeze occurred that led to the replanting of about 81,000 hectares of corn in Tennessee. Limited research was available on effective herbicide options to control failed stands of glyphosate-tolerant corn where replanting to corn was desired. Therefore, in 2007 on three failed freeze-damaged corn stands (27,000 plants/ha) and in 2008 on two non–freeze-damaged corn stands (81,000 plants/ha), studies were initiated to determine how to control the failed stand while not harming subsequent replant corn. The results from this research clearly show that producers have several effective options to manage undesirable glyphosate-tolerant corn before replanting to corn. Clethodim at 0.14 kg/ha, paraquat at 0.84 kg/ha, or paraquat at 0.70 kg/ha plus a photosystem II (PSII) inhibitor provided very good control of the original corn stand without affecting the yield of the replanted corn. Moreover, the addition of a PSII inhibitor could provide residual weed control in the replanted corn. Paraquat should be applied at rates of 0.70 kg/ha or greater to obtain consistent control of an undesirable corn stand.


Corresponding author

Corresponding author's E-mail:


Hide All
Andrade, F. H. and Abbate, P. E. 2005. Response of maize and soybean to variability in stand uniformity. Agron. J. 97:12631269.
Anonymous, , 2006. Yield effect of uneven corn heights. Accessed: September 11, 2008.
Anonymous, , 2008a. Roundup PowerMax herbicide product label. St. Louis, MO: Monsanto. P. 2.
Anonymous, , 2008b. Ignite herbicide product label. Research Triangle Park, NC: Bayer CropScience. P. 3.
Anonymous, , 2008c. Select Max herbicide 2EE product label. Walnut Creek, CA: Valent U.S.A. P. 2.
Anonymous, , 2008d. Aatrex herbicide produce label. Greensboro, NC: Syngenta Crop Protection. P. 8.
Anonymous, , 2008e. Princep herbicide product label. Greensboro, NC: Syngenta Crop Protection. P. 24.
Carmer, S. G., Nyquist, W. E., and Walker, W. M. 1989. Least significant differences for combined analysis of experiments with two or three-factor treatment designs. Agron. J. 81:655672.
Carter, P. R., Nafziger, E. D., and Hicks, D. R. 1992. Effects of Uneven Seedling Emergence in Corn. Accessed: September 11, 2008.
Hager, A. and Sprague, C. 2002. Corn Replanting and Herbicide Considerations. Accessed: September 11, 2008.
Liu, W., Tollenaar, M., Stewart, G., and Deen, W. 2004. Response of corn grain yield to spatial and temporal variablity in emergence. Crop Sci 44:847854.
Nafziger, E. D., Carter, P. R., and Graham, E. E. 1991. Response of corn to uneven emergence. Crop Sci 31:811815.
Nielsen, R. L., Thomison, P. R., Brown, G. A., Halter, A. L., Wells, J., and Wuethrich, K. L. 2002. Delayed planting effects on flowering and grain maturation of dent corn. Agron. J. 94:549558.
Owen, M. D. K. and Zelaya, I. A. 2005. Herbicide-resistant crops and weed resistance to herbicides. Pest Manag. Sci 61:301311.
Pommel, B., Mouraux, D., Cappellen, O., and Ledent, J. F. 2002. Influence of delayed emergence and canopy skips on growth and development of maize plants: a plant scale approach with CERES-Maize. Eur. J. Agron 16:263277.
[SAS] Statistical Analysis Systems 2008. Statistical Analysis Software. Version 9.1. Cary, NC: Statistical Analysis Systems Institute.
Steckel, L. E., Craig, C. C., and Hayes, R. M. 2006. Glyphosate-resistant horseweed (Conyza canadensis) control with glufosinate prior to planting no-till cotton. Weed Technol 20:10471051.
[USDA-NASS] US Department of Agriculture–National Agricultural Statistics Service 2008. Acreage 2007. Accessed: September 11, 2008.



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