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Imazethapyr plus Propanil Programs in Imidazolinone-Resistant Rice

  • Tyler P. Carlson (a1), Eric P. Webster (a1), Michael E. Salassi (a2), Justin B. Hensley (a1) and David C. Blouin (a3)...


Field studies were conducted in 2008 and 2009 near Crowley, Louisiana, to evaluate the addition of different propanil formulations in mixture with a standard imazethapyr program of 70 g ai ha−1 early postemergence followed by (fb) 70 g ha−1 late postemergence. Weeds evaluated included red rice, barnyardgrass, Texasweed, and alligatorweed. Control of all species with treatments, including a propanil formulation applied at 3,400 g ai ha−1, was equivalent to, or greater than, the standard imazethapyr program. Rough rice yield and economic returns were maximized when the propanil formulations of Propanil 1 or Propanil 3 were mixed with imazethapyr in the early postemergence applications. The addition of propanil to imazethapyr increased rough rice yield and economic returns because of improved weed control.

En 2008 y 2009, se realizaron estudios de campo cerca de Crowley, Louisiana para evaluar la adición de diferentes formulaciones de propanil en mezcla con un programa estándar de imazethapyr de 70 g ia ha−1 aplicado en post-emergencia temprana y seguido por (fb) 70 g ha−1 en post-emergencia tardía. Las malezas evaluadas incluyeron Oryza sativa (silvestre), Echinochloa crus-galli, Caperonia palustris y Althernanthera philoxeroides. El control de todas las especies con tratamientos incluyendo una formulación de propanil, aplicada a 3400 g ia ha−1, fue equivalente o mayor que el programa estándar de imazethapyr. El rendimiento de arroz en bruto y los ingresos se maximizaron cuando las formulaciones de Propanil 1 o Propanil 3 se mezclaron con imazethapyr en post-emergencia temprana. La adición de propanil al imazethapyr incrementó el rendimiento bruto del arroz y los ingresos, debido al mejoramiento en el control de malezas.


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Ashton, F. M. and Monaco, T. J. 1991. Weed Science: Principles and Practices. 3rd ed. New York: J. Wiley.
Baltazar, A. M. and Smith, R. J. Jr. 1994. Propanil-resistant barnyardgrass (Echinochloa crus-galli) control in rice (Oryza sativa). Weed Technol 8:575581.
Braverman, M. P. 1995. Weed control in rice (Oryza sativa) with quinclorac and bensulfuron coating of granular herbicides and fertilizer. Weed Technol 9:494498.
Carmer, S. G., Nyuist, W. E., and Walker, W. M. 1989. Least significant differences for combined analysis of experiments with two of three-factor treatment designs. Agron. J. 81:665672.
Craigmiles, J. P. 1978. Introduction. Pages 56. In Eastin, E. F. ed. Red Rice Research and Control. Texas Agricultural Experiment Station Bull. 1270.
Croughan, T. P. 1994. Application of tissue culture techniques to development of herbicide resistant rice. La. Agric 37:2526.
Gianessi, L. P. 2005. Economic and herbicide use impacts of glyphosate-resistant crops. Pest Manag. Sci 61:241245.
Hager, A. G., Wax, L. M., Bollero, G. A., and Stroller, E. W. 2003. Influence of diphenylether herbicide application rate and timing on common waterhemp (Amaranthus rudis) control in soybean (Glycine max). Weed Technol 17:1420.
Hydrick, D. E. and Shaw, D. R. 1994. Effects of tank-mix combinations of non-selective foliar and selective soil-applied herbicides on three weed species. Weed Technol 8:129133.
Judd, W. S., Campbell, C. S., Kellogg, E. A., and Stevens, P. F. 1999. Plant Systematics: A Phylogenetic Approach. Sunderland, MA: Sinauer Associates. Pp. 283288.
Khodayari, K., Smith, R. J. Jr., and Black, H. L. 1987. Red rice (Oryza sativa) control with herbicide treatments in soybeans (Glycine max). Weed Sci 35:127129.
Klingaman, T. E., King, C. A., and Oliver, L. R. 1992. Effect of application rate, weed species and weed stage of growth on imazethapyr activity. Weed Sci 40:227232.
Lorenzi, H. J. and Jeffery, L. S. 1987. Weeds of the United States and their Control. New York: Van Nostrand Reinhold. 355 p.
Masson, J. A. and Webster, E. P. 2001. Use of imazethapyr in water-seeded imidazolinone-tolerant rice (Oryza sativa). Weed Technol 15:103106.
Masson, J. A., Webster, E. P., and Williams, B. J. 2001. Flood depth, application timing, and imazethapyr activity in imidazolinone tolerant rice (Oryza sativa). Weed Technol 15:315319.
Pellerin, K. J., Webster, E. P., Zhang, W., and Blouin, D. C. 2003. Herbicide mixtures in water-seeded imidazolinone-resistant rice (Oryza sativa). Weed Technol 17:836841.
Pellerin, K. J., Webster, E. P., Zhang, W., and Blouin, D. C. 2004. Potential use of imazethapyr mixtures in drill-seeded imidazolinone-resistant rice. Weed Technol 18:10371042.
Richard, E. P. Jr. and Street, J. E. 1984. Herbicide performance in rice (Oryza sativa) under three flooding conditions. Weed Sci 32:157162.
Richburg, J. S. III, Wilcut, J. W., and Wiley, G. L. 1995. AC 263,222 and imazethapyr rates and mixtures for weed management in peanut (Arachis hypogaea). Weed Technol 9:801806.
SAS 2003. Version 9.1. Cary, NC: SAS Institute.
Senseman, S. A. ed. 2007. Herbicide Handbook. 9th ed. Lawrence, KS: Weed Science Society of America. Pp. 169171.
Smith, R. J. Jr. 1961. 3,4-Dichloropropionanilide for control of barnyardgrass in rice. Weeds 9:318322.
Smith, R. J. Jr. 1965. Propanil and mixtures with propanil for weed control in rice. Weeds 13:236238.
Smith, R. J. Jr. 1974. Responses of rice to postemergence treatments of propanil. Weed Sci 22:563568.
Smith, R. J. Jr. 1981. Control of red rice (Oryza sativa) in water-seeded rice (O. sativa). Weed Sci 29:663666.
Smith, R. J. Jr. and Hill, J. E. 1990. Weed control technology in U.S. rice. Pages 314327. In Grayson, B. T., Green, M. B., and Copping, L. G. eds. Pest Management in Rice. United Kingdom: Elsevier Science.
Smith, R. J. Jr. and Khodayari, K. 1985. Herbicide treatments for control of weeds in dry-seeded rice (Oryza sativa). Weed Sci 33:686692.
Stidham, M. A. and Singh, B. K. 1991. Imidazolinone-acetohydroxyacid synthase interactions. In Shaner, D. L. and O'Conner, S. L. eds. The Imidazolinone Herbicides. Boca Raton, FL: CRC. Pages. 7190.
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 38:6773.
[USDA] U.S. Department of Agriculture 2009. World Agricultural Supply and Demand Estimates (WASDE). Accessed: October 21, 2009.
Webster, E. P. and Levy, R. 2009. Weed Management. Pages 4671. In Saichuk, J. ed. Louisiana Rice Production Handbook. Pub. 2321. Baton Rouge, LA: Louisiana State University Agricultural Center.
Webster, E. P. and Masson, J. A. 2001. Acetolactate synthase–inhibiting herbicides on imidazolinone-tolerant rice. Weed Sci 49:652657.
Webster, T. M. 2004. Weed survey—southern states. Proc. South. Weed Sci. Soc 57:404426.
Zhang, W., Webster, E. P., and Selim, H. M. 2001. Effect of soil moisture on efficacy of imazethapyr in greenhouse. Weed Technol 15:355359.


Imazethapyr plus Propanil Programs in Imidazolinone-Resistant Rice

  • Tyler P. Carlson (a1), Eric P. Webster (a1), Michael E. Salassi (a2), Justin B. Hensley (a1) and David C. Blouin (a3)...


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