Hostname: page-component-7479d7b7d-t6hkb Total loading time: 0 Render date: 2024-07-11T16:17:08.675Z Has data issue: false hasContentIssue false
  • English
  • Français

Adsorption and relative mobility of flumetsulam

Published online by Cambridge University Press:  12 June 2017

David R. Shaw  and
Glen P. Murphy
Glen P. Murphy
Affiliation:
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762
Get access Rights & Permissions [Opens in a new window]

Abstract

Laboratory studies were conducted to evaluate flumetsulam adsorption and mobility in seven Mississippi soils of different organic matter content, pH, and texture. Adsorption isotherms were determined for all soils using a 1:1 (soil: water) technique. In six of seven soils, Freundlich n constants were close to unity, suggesting a partitioning-like adsorption mechanism for flumetsulam. Mobility was examined using packed soil columns. 14C-flumetsulam recoveries in leachate ranged from 1 to 70% and were influenced by both organic matter content and soil pH. However, the effects of organic matter content and soil pH were not independent. Consequently, clear relationships between flumetsulam mobility and either organic matter content or soil pH were not established across all soils. However, among soils of similar pH (7.5 ± 0.3), mobility decreased linearly (R2 = 0.75) as organic matter content increased from 0.7 to 3.6%. Across soils with similar organic matter content (3.9 ± 0.3%), mobility increased linearly (R2 = 0.98) as soil pH increased from 5.3 to 7.2. Net adsorption constants (Kd) provided a more accurate assessment of flumetsulam mobility across all soils than Koc.

Keywords

Flumetsulam, N-(2,6-difluorophenyl)-5-methyl[1,2,4]triazolo[1,5a] pyrimidine-2-sulfonamideLeachingsoil organic mattersoil pHsoil texture
Type
Soil, Air, and Water
Information
Weed Science , Volume 45 , Issue 4 , August 1997 , pp. 573 - 578
Copyright
Copyright © 1997 by the 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

Beyer, E. M., Duffy, M. J., Hay, J. V., and Schlueter, D. D. 1987. Sulfonylureas. in Kearney, P. C. and Kaufman, D. D., eds. Herbicide Chemistry. Degradation and Mode of Action. Volume 3. New York: Marcel-Dekker, pp. 117–189.Google Scholar
Bohn, H. L., McNeal, B. L., and O'Connor, G. A. 1985. In Soil Chemistry. 2nd ed. New York: J. Wiley, pp. 209–220.Google Scholar
Fontaine, D. D., Lehmann, R. G., and Miller, J. R. 1991. Soil adsorption of neutral and anionic forms of a sulfonamide herbicide, flumetsulam. J. Environ. Qual. 20: 759–762.Google Scholar
Frear, D. S., Swanson, H. R., and Tanaka, F. S. 1993. Metabolism of flumetsulam (DE-498) in wheat, corn, barley. Pestic. Biochem. Phy. 45: 178–192.Google Scholar
Gerwick, B. C. and Kleschick, W. A. 1991. DE-498: a new broadspectrum herbicide for soybean and other crops. Weed Sci. Soc. Am. Abstr. 31: 10.Google Scholar
Hamaker, J. W. 1975. The interpretation of soil leaching experiments. in Haque, R. and Freed, V. H., eds. Environmental Dynamics of Pesticides. New York: Plenum Press, pp. 115–133.Google Scholar
Kleschnick, W. A., Gerwick, B. C., Carson, C. M., Monte, W. T., and Sanders, S. W. 1992. DE-498, a new acetolactate synthase inhibiting herbicide with multicrop selectivity. J. Agric. Food Chem. 40: 1083–1085.Google Scholar
Lehmann, R. G., Miller, J. R., Fontaine, D. D., Laskowski, D. A., Hunter, J. H., and Cordes, R. C. 1992. Degradation of a sulfonamide herbicide as a function of soil sorption. Weed Res. 32: 197–205.Google Scholar
Murphy, G. P. and Shaw, D. R. 1997. Field mobility of flumetsulam in three Mississippi soils. Weed Sci. 45: 564–567.Google Scholar
Stougaard, R. N., Shea, P. J., and Martin, A. R. 1990. Effect of soil type and pH on adsorption, mobility, and efficacy of imazaquin and imazethapyr. Weed Sci. 38: 67–73.Google Scholar
Weber, J. B. and Swain, L. R. 1986. Herbicide mobility in soil leaching columns. in Camper, N. D., ed. Research Methods in Weed Science. 3rd ed. Champaign, IL: Southern Weed Science Society, pp. 190–200.Google Scholar
Weber, J. B. and Whitacre, D. M. 1982. Mobility of herbicides in soil columns under saturated- and unsaturated-flow conditions. Weed Sci. 30: 579–584.Google Scholar
Wolt, J. D., Schwake, J. D., Batzer, F. R., et al. 1992. Anaerobic aquatic degradation of flumetsulam [N-(2,6-difluorophenyl)-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine-2-sulfonamide]. J. Agric. Food Chem. 40: 2302–2308.CrossRefGoogle Scholar