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Virginia Buttonweed (Diodia virginiana) Control with Pyridine Herbicides1

Published online by Cambridge University Press:  20 January 2017

Steven T. Kelly
Louisiana State University Agricultural Center, Cooperative Extension Service, Winnsboro, LA 71295
G. Euel Coats
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762


Field experiments were conducted to evaluate pyridine herbicides for Virginia buttonweed control and turfgrass tolerance. Treatments included clopyralid and fluroxypyr applied at 35, 70, 140, 280, and 560 g ae/ha, compared to a three-way combination of 2,4-D plus dichlorprop plus dicamba (840 + 840 + 210 g ae/ha, respectively). Fluroxypyr applied at 140 g/ha or greater controlled Virginia buttonweed 80% or greater through 10 wk after treatment. A second experiment evaluated 280 g/ha clopyralid or 140 g/ha fluroxypyr alone or in combination with 0.25 or 0.50% (v/v) nonionic surfactant, compared to 280 g/ha dicamba or 1,120 g/ha 2,4-D alone or in combination with nonionic surfactant. The addition of nonionic surfactant to clopyralid or fluroxypyr did not increase Virginia buttonweed control. Fluroxypyr at 280 g/ha and higher produced 22 to 53% injury to bermudagrasses 2 wk after treatment. Common centipedegrass was injured through 3 wk after treatment with 4,470 g/ha fluroxypyr or greater. Zoysiagrass exhibited injury with 4,470 g/ha fluroxypyr at 2 wk after treatment; however, injury was less than 8% at 3 wk. Common St. Augustinegrass was severely injured with 2,235 g/ha or greater fluroxypyr through 7 wk after treatment. Clopyralid did not cause injury to any turfgrass species.

Research Article
Copyright © Weed Science Society of America 

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Literature Cited

Baldwin, J. L., Coats, G. E., and Kelly, S. T. 1991. Evaluation of Herbicide Combinations for Virginia Buttonweed Control. Mississippi State: Mississippi Agricultural and Forestry Experiment Station, Research Rep. Volume 16, Number 9. 4 p.Google Scholar
Chism, W. J. and Bingham, S. W. 1992. Virginia buttonweed (Diodia virginiana L.) control in tall fescue in Virginia. Weed Sci. Soc. Am. Abstr. 32:31.Google Scholar
Dickens, R. and Turner, D. L. 1985. Virginia buttonweed: an increasing problem in turf. Proc. South Weed Sci. Soc. 38:102.Google Scholar
Duble, R. L., Menn, W. G., Walker, J. R., and Beard, J. B. 1986. An Assessment of Herbicides for the Selective Control of Buttonweed in Texas Common St. Augustine. College Station: Texas Agricultural Experiment Station, Texas Turfgrass Research. 30 p.Google Scholar
Fitsimons, P. J., Barnwell, P., and Cobb, A. H. 1988. A study of auxin-type herbicide action based on dose-response analysis of H+-efflux. In Proceedings of the European Weed Research Society Symposium, Factors Affecting Herbicidal Activity and Selectivity. Wageningen, The Netherlands: European Weed Research Society. pp. 6368.Google Scholar
Heering, D. C., Coats, G. E., Shaw, D. R., and Krans, J. V. 1987. Evaluation of various postemergence herbicides for Virginia buttonweed Control. Mississippi State: Mississippi Agriculture and Forestry Experiment Station, Research Rep. Volume 12, Number 25. 4 p.Google Scholar
Hurto, K. A., Thielen, M. J., and Mahady, M. M. 1984. Postemergence activity of triclopyr for broadleaved weed control in turf. Agron. Abstr. 151.Google Scholar
Jordan, J. H. 1980a. Postemergence control of Virginia buttonweed in bermudagrass turf. . Mississippi State University, Mississippi State, MS. 61 p.Google Scholar
Jordan, J. H. 1980b. Postemergence control of Virginia buttonweed in turf. Proc. South. Weed Sci. Soc. 33:31.Google Scholar
Kidd, F. A. 1988. Clopyralid: new herbicide chemistry for rights-of-way application. Proc. North Cent. Weed Control Conf. 43:121.Google Scholar
Mahady, M. M. 1985. Development of new herbicides for controlling broadleaf weeds: postemergent activity of triclopyr for broadleaf weed control in turf. Proc. Northwest Turf Conf. 39:84.Google Scholar
Radford, A. E., Ahles, H. E., and Bell, C. R. 1968. Manual of Vascular Flora of the Carolinas. Chapel Hill, NC: University of North Carolina Press. p. 979.Google Scholar
Rippee, J. H. 1992. Efficacy, uptake, and translocation of post herbicides for Virginia buttonweed (Diodia virginiana L.). . Mississippi State University, Mississippi State, MS. 59 p.Google Scholar