Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-30T19:13:27.607Z Has data issue: false hasContentIssue false
  • English
  • Français

Interaction of Glyphosate and Pelargonic Acid in Ready-to-Use Weed Control Products

Published online by Cambridge University Press:  20 January 2017

Glenn Wehtje ,
James E. Altland  and
Charles H. Gilliam
Glenn Wehtje*
Affiliation:
Auburn University, Auburn AL 36849
James E. Altland
Affiliation:
USDA-ARS. Applications Technology Research Unit, 208 Agricultural Engineering Building, 1680 Madison Ave., Wooster, OH 44691
Charles H. Gilliam
Affiliation:
Auburn University, Auburn AL 36849
*
Corresponding author's E-mail: wehtjgr@auburn.edu.
Get access Rights & Permissions [Opens in a new window]

Abstract

Glyphosate-based, ready-to-use weed control products often contain pelargonic acid (PA) at a concentration equivalent to that of the glyphosate. It remains unclear what benefit, if any, this combination provides. Greenhouse experiments using large crabgrass, yellow nutsedge, longstalked phyllanthus, and prostrate spurge were conducted to determine whether the addition of PA improved weed control efficacy compared to glyphosate alone. Glyphosate was applied at a series of rates, ranging from 0.11 to 1.12 kg ae/ha, either alone or with an equal rate of PA. Addition of PA to glyphosate was synergistic only in longstalked phyllanthus and yellow nutsedge, and this synergism was manifested only as an increase in the amount of early (i.e., 5 to 7 d after treatment) visual injury. Conversely, longer-term control and control of regrowth was either not affected or reduced by the addition of PA. We conclude that the addition of PA to glyphosate in ready-to-use weed control products is neither warranted nor justified. However, we also note that the increase in early injury that was observed in only two of the four species evaluated could be an important attribute for the consumers for which these products are targeted.

Keywords

Glyphosatepelargonic acidlarge crabgrass, Digitaria sanguinalis (L.) Scoop DIGSAlongstalked phyllanthus, Phyllanthus tenellus Roxbprostrate spurge, Chamaesyce masculata (L.) Small EPHPTyellow nutsedge, Cyperus esculentus L. CYPESHerbicide efficacylinear regressionnonlinear regressionsynergism and antagonism
Type
Research Article
Information
Weed Technology , Volume 23 , Issue 4 , December 2009 , pp. 544 - 549
Copyright
Copyright © Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

Bradley, K. W. and Hagood, E. S. Jr. 2002. Evaluations of selected herbicides and rates for long term mugwort (Artemsia vulgaris) control. Weed Technol 16:164–170.CrossRefGoogle Scholar
Chachalis, D. and Reddy, K. N. 2004. Pelargonic acid and rainfall effects on glyphosate activity in trumpertcreeper (Campis radicans). Weed Technol 18:66–72.CrossRefGoogle Scholar
Coleman, R. and Penner, D. 2006. Desiccant activity of short chain fatty acids. Weed Technol 20:410–415.CrossRefGoogle Scholar
Currier, H. B. and Peoples, S. A. 1954. Phytotoxicity of hydrocarbons. Hilgardia 23:155–173.CrossRefGoogle Scholar
DeMan, J. M. 1990. Principles of Food Chemistry. 2nd ed. New York, NY: Chapman and Hall. 36–88.Google Scholar
Hatzios, K. K. and Penner, D. 1985. Interaction of herbicides with other agrochemicals in higher plants. Rev. Weed Sci 1:1–63.Google Scholar
Jaworski, E. G. 1972. The mode of action of N-(phosphonomethyl)glycine: inhibition of aromatic amino acid biosynthesis. J. Agric. Food Chem 20:1195–1198.CrossRefGoogle Scholar
Morse, P. A. 1978. Some comments on the assessment of joint action on herbicide mixtures. Weed Sci 26:58–71.CrossRefGoogle Scholar
Pline, W. A., Hatzios, K. K., and Hagood, E. S. 2000. Weed and herbicide-resistant soybean response to glufosinate and glyphosate plus ammonium sulfate and pelargonic acid. Weed Technol 14:667–674.CrossRefGoogle Scholar
Pline, W. A., Wu, J., and Hatzios, K. K. 1999. Absorption, translocation and metabolism of glufosinate in five weed species as influenced by ammonium sulfate and pelargonic acid. Weed Sci 47:636–643.CrossRefGoogle Scholar
Seefeldt, S. S., Jensen, J. E., and Fuerst, E. P. 1995. Log-logistic analysis of herbicide dose–response relationships. Weed Technol 9:218–227.CrossRefGoogle Scholar
Senseman, S. A. 2007a. Herbicide Handbook. 9th ed. Lawrence, KS: Weed Science Society of America. 186–187.Google Scholar
Senseman, S. A. 2007b. Herbicide Handbook. 9th ed. Lawrence, KS: Weed Science Society of America. 379–381.Google Scholar
Steinrücken, H. C. and Amrhein, P. 1980. The herbicide glyphosate is a potent inhibitor of 5-enolpyruvylshikimic acid-3-phosphate synthase. Biochem. Biophys. Res. Comm 94:1207–1212.CrossRefGoogle Scholar
Streibig, J. C. and Jensen, J. E. 2000. Actions of herbicides in mixtures. Pages 153–180. in Cobb, A. H. and Kirkwood, R. C. Herbicides and their Mechanisms of Action. Boca Raton, FL: CRC.Google Scholar