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Glyphosate-Resistant Horseweed (Conyza canadensis) in Mississippi

Published online by Cambridge University Press:  20 January 2017

Clifford H. Koger ,
Daniel H. Poston ,
Robert M. Hayes  and
Robert F. Montgomery
Clifford H. Koger*
Affiliation:
USDA-ARS Southern Weed Science Research Unit, 141 Experiment Station Road, P.O. Box 350, Stoneville, MS 38776
Daniel H. Poston
Affiliation:
Delta Research and Extension Center, Mississippi State University, Stoneville, MS
Robert M. Hayes
Affiliation:
Department of Plant Sciences, University of Tennessee, Knoxville
Robert F. Montgomery
Affiliation:
Monsanto Company, Union City, TN
*
Corresponding author's E-mail: [email protected]
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Abstract

Survival of horseweed in several glyphosate-tolerant cotton and soybean fields treated with glyphosate at recommended rates preplant and postemergence was observed in Mississippi and Tennessee in 2001 and 2002. Plants originating from seed collected from fields where horseweed escapes occurred in 2002 were grown in the greenhouse to the 5-leaf, 13- to 15-leaf, and 25- to 30-leaf growth stages and treated with the isopropylamine salt of glyphosate at 0, 0.025, 0.05, 0.1, 0.21, 0.42, 0.84, 1.68, 3.36, 6.72, and 13.44 kg ae/ha to determine if resistance to glyphosate existed in any biotype. All biotypes exhibited an 8- to 12-fold level of resistance to glyphosate when compared with a susceptible biotype. One resistant biotype from Mississippi was two- to fourfold more resistant than other resistant biotypes. Growth stage had little effect on level of glyphosate resistance. The glyphosate rate required to reduce biomass of glyphosate-resistant horseweed by 50% (GR50) increased from 0.14 to 2.2 kg/ha as plant size increased from the 5-leaf to 25- to 30-leaf growth stage. The GR50 rate for the susceptible biotype increased from 0.02 to 0.2 kg/ha glyphosate. These results demonstrate that the difficult-to-control biotypes were resistant to glyphosate, that resistant biotypes could survive glyphosate rates of up to 6.72 kg/ha, and that plant size affected both resistant and susceptible biotypes in a similar manner.

Keywords

Glyphosatehorseweed, Conyza canadensis (L.) Cronq. # ERICAcotton, Gossypium hirsutum L.soybean, Glycine max (L.) MerrBiomass reductionglyphosate resistanceherbicide resistanceherbicide toleranceweed resistanceDAT, day after treatmentPOST, postemergenceWAT, week after treatment
Type
Research
Information
Weed Technology , Volume 18 , Issue 3 , September 2004 , pp. 820 - 825
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

Askew, S. D. and Wilcut, J. W. 1999. Cost and weed management with herbicide programs in glyphosate-resistant cotton (Gossypium hirsutum). Weed Technol. 13:308–313.Google Scholar
Ateh, C. M. and Harvey, R. G. 1999. Annual weed control by glyphosate in glyphosate-resistant soybean (Glycine max). Weed Technol. 13:394–398.Google Scholar
Evers, G. W. 2002. Herbicides for desiccating dallisgrass (Paspalum dilatatum)-bermudagrass (Cynodon dactylon) pasture sod prior to overseeding with annual ryegrass (Lolium multiflorum). Weed Technol. 16:235–238.Google Scholar
Faircloth, W. H., Patterson, M. G., Monks, C. D., and Goodman, W. R. 2001. Weed management programs for glyphosate-tolerant cotton (Gossypium hirsutum). Weed Technol. 15:544–551.Google Scholar
Feng, P. C. C., Pratley, J. E., and Bohn, J. A. 1999. Resistance to glyphosate in Lolium rigidum. II. Uptake, translocation, and metabolism. Weed Sci. 47:412–415.Google Scholar
Gadamski, G., Ciarka, D., Gressel, J., and Gawronski, S. W. 2000. Negative cross-resistance in triazine-resistant biotypes of Echinochloa crus-galli and Conyza canadensis . Weed Sci. 48:176–180.Google Scholar
Gianessi, L. P., Silvers, C. S., Sankula, S., and Carpenter, J. E. 2003. Plant Biotechnology: Current and Potential Impact for Improving Pest Management in U.S. Agriculture, An Analysis of 40 Case Studies. Washington, DC: National Center for Food and Agricultural Policy: Web page: http://ncfap.org/40CaseStudies.htm. Accessed: August 11, 2003.Google Scholar
Heap, I. 2003. Herbicide Resistant Weeds. Weed Science Society of America: Web page: http://www.weedscience.org/. Accessed: August 11, 2003.Google Scholar
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. 14:57–65.Google Scholar
Lee, L. J. and Ngim, J. 2000. A first report of glyphosate-resistant goosegrass [Eleusine indica (L.) Gaertn] in Malaysia. Pest Manage. Sci 56:336–339.Google Scholar
McCarty, L. B., Colvin, D. L., and Higgins, J. M. 1996. Highbush blackberry (Rubus argutus) control in bahiagrass (Paspalum notatum). Weed Technol. 10:754–761.Google Scholar
Mueller, T. C., Massey, J. H., Hayes, R. M., Main, C. L., and Stewart, C. N. Jr. 2003. Shikimate accumulation in both glyphosate-sensitive and glyphosate-resistant horseweed (Conyza canadensis L. Cronq). J. Agric. Food Chem. 51:680–684.Google Scholar
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. 16:604–607.CrossRefGoogle Scholar
Pratley, J., Urwin, N., Stanton, R., Baines, P., Broster, J., Cullis, K., Schafer, D., Bohn, J., and Kruger, R. 1999. Resistance to glyphosate in Lolium rigidum. I. Bioevaluation. Weed Sci 47:405–411.CrossRefGoogle Scholar
Reddy, K. N. and Whiting, K. 2000. Weed control and economic comparisons of glyphosate-resistant, sulfonylurea-tolerant, and conventional soybean (Glycine max) systems. Weed Technol. 14:204–211.Google Scholar
Seber, G. A. F. and Wild, C. J. 1989. Nonlinear Regression. New York: J. Wiley. 768 p.Google Scholar
Smisek, A., Doucet, C., Jones, M., and Weaver, S. 1998. Paraquat resistance in horseweed (Conyza canadensis) and Virginina pepperweed (Lepidium virginicum) from Essex County, Ontario. Weed Sci. 46:200–204.CrossRefGoogle Scholar
[SWSS] Southern Weed Science Society. 2003. Weed Identification Guide. Champaign, IL: Southern Weed Science Society.Google Scholar
VanGessel, M. J. 2001. Glyphosate-resistant horseweed from Delaware. Weed Sci. 49:703–705.Google Scholar
Vencill, W. K. and Banks, P. A. 1994. Effects of tillage systems and weed management on weed populations in grain sorghum (Sorghum bicolor). Weed Sci. 42:541–547.CrossRefGoogle Scholar
Westwood, J. H., Yerkes, C. N., DeGennaro, F. P., and Weller, S. C. 1997. Absorption and translocation of glyphosate in tolerant and susceptible biotypes of field bindweed (Convolvulus arvensis). Weed Sci. 45:658–663.CrossRefGoogle Scholar