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Small-Grain Cover Crop Interaction with Glyphosate-Resistant Corn (Zea mays)

Published online by Cambridge University Press:  20 January 2017

Jason K. Norsworthy
Jason K. Norsworthy*
Affiliation:
Department of Crop and Soil Environmental Sciences, Clemson University, 277 Poole Agricultural Center, Clemson, SC 29634-0359
*
Corresponding author's E-mail: [email protected]
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Abstract

A 2-yr field study was conducted in Blackville, SC, to assess the potential for using small-grain cover crops and glyphosate as a means of reducing or eliminating the need for atrazine in irrigated Southeastern corn production. Oats, rye, and wheat were no-till, drill seeded each fall and subsequently desiccated in early spring before corn planting. A bareground conventional tilled treatment also was included. Within each cover crop system, the herbicides evaluated included (1) no herbicide; (2) 1.68 kg ai/ha atrazine plus 1.08 kg ai/ha S-metolachlor at corn planting followed by 0.84 kg ae/ha glyphosate; or (3) two applications of 0.84 kg/ha glyphosate alone, applied sequentially. All systems were compared with conventional tillage without a cover crop with 1.68 kg/ha atrazine plus 1.08 kg/ha S-metolachlor at planting followed by 1.12 kg/ha atrazine. Biomass of rye, oats, and wheat at dessication was 497, 369, and 340 g/m2, respectively. All cover crops delayed early-season corn growth. Detrimental effects on early-season corn growth from the oats cover crop were still apparent 7 wk after emergence (WAE), with corn height and biomass reduced 8 and 19%, respectively. Weed biomass in nontreated plots was reduced 84, 68, and 21% by oats, rye, and wheat, respectively, 3 WAE. Oats were more inhibitory of corn and weed growth than rye, although rye produced greater surface residue, indicating possible allelopathy affects. In the presence and absence of each cover crop, atrazine plus S-metolachlor followed by glyphosate or sequential glyphosate applications alone were effective in providing season-long control of pitted morningglory, entireleaf morningglory, Palmer amaranth, Florida pusley, large crabgrass, and common bermudagrass. Corn yields and gross profit margins in sequential glyphosate–treated plots were equivalent or superior to the standard atrazine-based program, which indicates that effective and economical alternatives to atrazine are available.

Keywords

AtrazineglyphosateS-metolachlorcommon bermudagrass, Cynodon dactylon (L.) Pers. #3 CYNDAentireleaf morningglory, Ipomoea hederacea var. integriuscula Gray # IPOHGFlorida pusley, Richardia scabra L. # RCHSClarge crabgrass, Digitaria sanguinalis (L.) Scop. # DIGSAPalmer amaranth, Amaranthus palmeri S. Wats. # AMAPApitted morningglory, Ipomoea lacunosa L. # IPOLAcorn, Zea mays L. ‘DK662 RR’oats, Avena sativa L. ‘Coker 820’rye, Secale cereale L. ‘Wrenz’wheat, Triticum aestivum L. ‘Pioneer 2684’Allelopathyconservation tillageintegrated weed managementstrip tillagetransgenic cornPOST, postemergenceWAE, weeks after emergence
Type
Research
Information
Weed Technology , Volume 18 , Issue 1 , March 2004 , pp. 52 - 59
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

Anonymous. 1995. Special Review Report: The Facts About Atrazine and Simazine. Greensboro, NC: Ciba Crop Protection. 37 p.Google Scholar
Anonymous. 2000. Crop Protection Reference. New York: C & P. Pp. 1530–1535.Google Scholar
Anonymous. 2002a. Agronomic Crop Enterprise Budgets, South Carolina, 2002 Season:. Web page: http://www.cherokee.agecon.clemson.edu/crop_bud.htm. Accessed: September 2002.Google Scholar
Anonymous. 2002b. Roundup WeatherMax Herbicide:. Web page: http://www.cdms.net/ldat/ld5UJ000.pdf. Accessed: September 2002.Google Scholar
Bauer, P. J. and Reeves, D. W. 1999. A comparison of winter cereal species and planting dates as residue cover for cotton grown with conservation tillage. Crop Sci 39:1824–1830.CrossRefGoogle Scholar
Cassel, D. K., Raczkowski, C. W., and Denton, H. P. 1995. Tillage effects on corn production and soil physical conditions. Soil Sci. Soc. Am. J. 59:1436–1443.CrossRefGoogle Scholar
Fernandez-Cornejo, J. and Jans, S. 1999. Pest Management in U.S. Agriculture. Economic Research Service, USDA. Agricultural Handbook No. 717. Web page: http://www.ers.usda/gov/publications/. Accessed: August 1999.Google Scholar
Ferrari, M. J., Ator, S. W., Blomquist, J. D., and Dysart, J. E. 1997. Pesticides in Surface Waters of the Mid-Atlantic Region. USGS Water-Resources Investigative Rep. 97-4280. Washington, DC: U.S. Department of Agriculture. Pp. 1–16.Google Scholar
Fortin, M. C. and Pierce, F. J. 1991. Timing and nature of mulch retardation of corn vegetative development. Agron. J 83:258–263.CrossRefGoogle Scholar
Haney, R. L., Senseman, S. A., Hons, F. M., and Zuberer, D. A. 2000. Effect of glyphosate on soil microbial activity and biomass. Weed Sci. 48:89–93.CrossRefGoogle Scholar
Hart, R. H., Hughes, R. E., Lewis, C. E., and Monson, W. G. 1970. Effect of nitrogen and shading on yield and quality of grasses grown under young slash pines. Agron. J 62:285–287.Google Scholar
Murdock, E. C. and Sherrick, S. 1998. Florida pusley (Richardia scabra) control in Roundup Ready soybeans. Proc. South. Weed Sci. Soc 52:57–58.Google Scholar
Norsworthy, J. K. and Oliver, L. R. 2002. Effect of irrigation, soybean density, and glyphosate on hemp sesbania (Sesbania exaltata) and pitted morningglory (Ipomoea lacunosa) interference in drill-seeded soybean. Weed Technol. 16:7–17.CrossRefGoogle Scholar
Smeda, R. J. and Weller, S. C. 1996. Potential of rye (Secale cereale) for weed management in transplanted tomatoes (Lycopersicon esculentum). Weed Sci. 44:596–602.CrossRefGoogle Scholar
Teasdale, J. R., Beste, C. E., and Potts, W. E. 1991. Response of weeds to tillage and cover crop residue. Weed Sci. 39:195–199.CrossRefGoogle Scholar
Teasdale, J. R. and Mohler, C. L. 1993. Light transmittance, soil temperature, and soil moisture under residue of hairy vetch and rye. Agron. J 85:673–680.CrossRefGoogle Scholar
Vencill, W. K. ed. 2002. Herbicide Handbook. 8th ed. Lawrence, KS: Weed Science Society of America. 493 p.Google Scholar
Vidal, R. A. and Bauman, T. T. 1996. Surface wheat (Triticum aestivum) residues, giant foxtail (Setaria faberi), and soybean (Glycine max) yield. Weed Sci. 44:939–943.Google Scholar
Wade, H. F., York, A. C., Morey, A. E., Padmore, J. M., and Rudo, K. M. 1998. The impact of pesticide use on groundwater in North Carolina. J. Environ. Qual. 27:1018–1026.CrossRefGoogle Scholar
Webster, T. M. and Coble, H. D. 1997. Changes in the weed species composition of the southern United States: 1974 to 1995. Weed Technol. 11:308–317.CrossRefGoogle Scholar
Williams, M. M. III, Mortensen, D. A., and Doran, J. W. 1998. Assessment of weed and crop fitness in cover crop residues for integrated weed management. Weed Sci. 46:595–603.CrossRefGoogle Scholar
Workman, S. R., Ward, A. D., Fausey, N. R., and Nokes, S. E. 1995. Atrazine and alachlor dissipation rates from field experiments. Trans. ASAE 38:1421–1425.CrossRefGoogle Scholar
Yenish, J. P., Worsham, A. D., and York, A. C. 1996. Cover crops for herbicide replacement in no-tillage corn (Zea mays). Weed Technol. 10:815–821.CrossRefGoogle Scholar
Zasada, I. A., Linker, H. M., and Coble, H. D. 1997. Initial weed densities affect no-tillage weed management with a rye (Secale cereale) cover crop. Weed Technol. 11:473–477.CrossRefGoogle Scholar