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In-Crop and Autumn-Applied Glyphosate Reduced Purple Nutsedge (Cyperus rotundus) Density in No-Till Glyphosate-Resistant Corn and Soybean

  • Krishna N. Reddy (a1) and Charles T. Bryson (a1)

Abstract

A 3-yr field study was conducted from 2005 to 2007 at Stoneville, MS, to determine efficacy of in-crop and autumn-applied glyphosate on purple nutsedge density and yield of no-till glyphosate-resistant (GR) corn and GR soybean. Separate experiments were conducted in GR corn and GR soybean in areas maintained under a no-tillage system after the autumn of 2004. Each experiment was conducted in a split-plot arrangement of treatments in a randomized complete-block design with and without autumn application of glyphosate at 1.68 kg ae/ha as main plots and in-crop herbicide application (glyphosate- and nonglyphosate-based programs) as subplots with three replications. In GR corn, glyphosate applied in the autumn reduced purple nutsedge density by 40 to 67% compared with no glyphosate during 3 yr. In GR corn, glyphosate applied in-crop reduced purple nutsedge shoot density by 48% in 2005, 92% in 2006, and 100% in 2007 compared with no herbicide. However, GR corn yields were unaffected by either in-crop or autumn-applied glyphosate. In GR soybean, glyphosate applied in the autumn reduced purple nutsedge shoot density by 64 to 83% compared with no glyphosate during 3 yr. Glyphosate applied in-crop in GR soybean reduced purple nutsedge density by 81% in 2005 and by 100% in 2006 and 2007 compared with no herbicide. GR soybean yields were similar in 2005, but yields were 34 and 18% higher in 2006 and 2007, respectively, with autumn-applied glyphosate compared with no glyphosate. GR soybean yields were higher with glyphosate applied in-crop compared with no herbicide in 2 of 3 yr. These results indicate that purple nutsedge density could be reduced with glyphosate applied in-crop in no-till GR corn and GR soybean. In addition, autumn-applied glyphosate was effective in reducing purple nutsedge populations following harvest of crops and could be an effective purple nutsedge management strategy regardless of GR trait.

Copyright

Corresponding author

Corresponding author's E-mail: krishna.reddy@ars.usda.gov.

References

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Akin, D. S. and Shaw, D. R. 2001. Purple nutsedge (Cyperus rotundus) and yellow nutsedge (Cyperus esculentus) control in glyphosate-tolerant soybean (Glycine max). Weed Technol 15:564570.
Anonymous 2009. Dual II Magnum® herbicide product label. Syngenta Crop Protection Publication No. SCP 818A-L1M 0204. Greensboro, NC: Syngenta. 36. http://www.syngentacropprotection.com/pdf/labels/SCP818AL1M0204n.pdf. Accessed: January 28, 2009.
Anonymous 2008. Permit® herbicide label. Gowan Company Publication No. 01-R0806EPA. Yuma, AZ: Gowan. 18. http://www.gowanco.com/ProductInfopid75Permit20.aspx. Accessed: November 6, 2008.
Bariuan, J. V., Reddy, K. N., and Wills, G. D. 1999. Glyphosate injury, rainfastness, absorption, and translocation in purple nutsedge (Cyperus rotundus). Weed Technol 13:112119.
Bendixen, L. E. and Nandihalli, U. B. 1987. Worldwide distribution of purple and yellow nutsedge (Cyperus rotundus and C. esculentus). Weed Technol 1:6165.
Bryson, C. T. and Carter, R. 2008. The significance of Cyperaceae as weeds. Pages 15101. In Naczi, R. F. C. and Ford, B. A. Sedges: Uses, Diversity, and Systematics of the Cyperaceae. Monogr. Syst. Bot. Missouri Bot. Gard. 108.
Bryson, C. T., Reddy, K. N., and Molin, W. T. 2003. Purple nutsedge (Cyperus rotundus) population dynamics in narrow row transgenic cotton (Gossypium hirsutum) and soybean (Glycine max) rotation. Weed Technol 17:805810.
Edenfield, M. W., Brecke, B. J., Colvin, D. L., Dusky, J. A., and Shilling, D. G. 2005. Purple nutsedge (Cyperus rotundus) control with glyphosate in soybean and cotton. Weed Technol 19:947953.
Elliott, S. 1821. A Sketch of the Botany of South Carolina and Georgia. Volume 1. Charleston, SC: J.R. Schenck. 606.
Hammerton, J. L. 1974. Experiments with Cyperus rotundus L., I: growth and development and effects of 2,4-D and paraquat. Weed Res 14:365369.
Holm, L. G., Plucknett, D. L., Pancho, J. V., and Herberger, J. P. 1977. The World's Worst Weeds: Distribution and Biology. Honolulu: University Press of Hawaii. 609.
Keeley, P. E. 1987. Interference and interaction of purple and yellow nutsedges (Cyperus rotundus and C. esculentus) with crops. Weed Technol 1:7481.
Keeley, P. E. and Thullen, R. J. 1971. Control of nutsedge with organic arsenical herbicides. Weed Sci 19:601606.
Miles, J. E., Nishimoto, R. K., and Kawabata, O. 1996. Diurnally altering temperatures stimulate sprouting of purple nutsedge (Cyperus rotundus) tubers. Weed Sci 44:122125.
Norsworthy, J. H., Schroeder, J., Thomas, S. H., and Murray, L. W. 2007. Purple nutsedge (Cyperus rotundus) management in direct-seeded chile pepper using halosulfuron and cultivation. Weed Technol 21:636641.
Patterson, D. T. 1982. Shading responses of purple and yellow nutsedges (Cyperus esculentus and C. rotundus). Weed Sci 30:2530.
Pereira, W., Crabtree, G., and William, R. D. 1987. Herbicide action on purple and yellow nutsedge (Cyperus rotundus and C. esculentus). Weed Technol 1:9298.
Rankins, A. Jr., Byrd, J. D. Jr., Mask, D. B., Barnett, J. W., and Gerard, P. D. 2005. Survey of soybean weeds in Mississippi. Weed Technol 19:492498.
Rao, A. S. and Reddy, K. N. 1999. Purple nutsedge (Cyperus rotundus) and sicklepod (Senna obtusifolia) response to glyphosate mixtures with ALS-inhibiting herbicides. Weed Technol 13:361366.
Reddy, K. N. 2005. Deep tillage and glyphosate reduced redvine (Brunnichia ovata) and trumpetcreeper (Campsis radicans) populations in glyphosate-resistant soybean. Weed Technol 19:713718.
Reddy, K. N. and Bendixen, L. E. 1988. Toxicity, absorption, translocation, and metabolism of foliar-applied chlorimuron in yellow and purple nutsedge (Cyperus esculentus and C. rotundus). Weed Sci 36:707712.
Thullen, R. J. and Keeley, P. E. 1979. Seed production and germination in Cyperus esculentus and C. rotundus . Weed Sci 27:502505.
Tucker, G. C., Marcks, B. G., and Carter, J. R. 2002. Cyperus . Pages 141191. In Ball, P. W., Gandhi, K., Kiger, R. W., Murray, D., Zarucchi, J. L., Reznicek, A. A., and Strother, J. L. Flora of North America. Volume 23. New York: Oxford University Press.
Webster, T. M. 2005. Weed survey—southern states. Proc. South. Weed Sci. Soc 58:291306.
Webster, T. M. 2008. Weed survey—southern states. Proc. South. Weed Sci. Soc 61:224243.
Webster, T. M., Grey, T. L., Davis, J. W., and Culpepper, A. S. 2008. Glyphosate hinders purple nutsedge (Cyperus rotundus) and yellow nutsedge (Cyperus esculentus) tuber production. Weed Sci 56:735742.
Wills, G. D. 1987. Description of purple and yellow nutsedge (Cyperus rotundus and C. esculentus). Weed Technol 1:29.
Zandstra, B. H. and Nishimoto, R. K. 1977. Movement and activity of glyphosate in purple nutsedge. Weed Sci 25:268274.

Keywords

In-Crop and Autumn-Applied Glyphosate Reduced Purple Nutsedge (Cyperus rotundus) Density in No-Till Glyphosate-Resistant Corn and Soybean

  • Krishna N. Reddy (a1) and Charles T. Bryson (a1)

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