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Imazethapyr at Different Rates and Timings in Drill- and Water-Seeded Imidazolinone-Tolerant Rice

  • Kristie J. Pellerin (a1) and Eric P. Webster (a1)

Abstract

Imazethapyr applied to the soil at 0, 35, 53, 70, 87, 105, and 140 g ai/ha followed by (fb) early-postemergence (EPOST) or late-postemergence (LPOST) applications at 140, 105, 87, 70, 53, 35, and 0 g ai/ha, respectively, was evaluated for weed control, crop tolerance, and grain yield in imidazolinone-tolerant rice. In drill- and water-seeded rice, imazethapyr effectively controlled barnyardgrass 91 to 97% with a soil fb EPOST or LPOST application except when applied at 105 fb 35 g/ha EPOST at 49 d after late-postemergence treatment. Rice yields were 5,920 and 3,920 kg/ ha in the drill-seeded study with a single application of imazethapyr at 140 g/ha EPOST in 2000 and 2001, respectively. These yields were greater than or equal to those from treatments with two imazethapyr applications.

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Corresponding author

Corresponding author's E-mail: ewebster@agcenter.lsu.edu

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∗ Published with the approval of the Director of the Agricultural Experiment Station, Louisiana State University AgCenter, Baton Rouge, LA 70803.

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References

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Baltazar, A. M. and Smith, R. J. Jr. 1994. Propanil-resistant barnyardgrass (Echinochloa crus-galli) control in rice (Oryza sativa). Weed Technol. 8:575581.
Cantwell, J. R., Libel, R. A., and Slife, F. W. 1989. Imazethapyr for weed control in soybean (Glycine max). Weed Technol. 3:596601.
Carey, V. F. III, Hoagland, R. E., and Talbert, R. E. 1995. Verification and distribution of propanil-resistant barnyardgrass (Echinochloa crus-galli) in Arkansas. Weed Technol. 9:366372.
Croughan, T. P. 1994. Application of tissue culture techniques to the development of herbicide resistant rice. La. Agric. 3:2526.
Dillon, T. L., Baldwin, F. L., and Talbert, R. E. 1999. Control of red rice and other difficult weeds in imidazolinone tolerant rice. Proc. South. Weed Sci. Soc. 52:15.
Dillon, T. L., Baldwin, F. L., and Talbert, R. E. 2001. Weed control programs in imidazolinone tolerant rice. Proc. South. Weed Sci. Soc. 54:43.
Grichar, W. J. 1994. Spiny amaranth (Amaranthus spinosus L.) control in peanut (Arachis hypogaea L). Weed Technol. 8:199202.
Hackworth, H. M., Sarokin, L. P., and White, R. H. 1998. 1997 field evaluation of imidazolinone tolerant rice. Proc. South. Weed Sci. Soc. 51:221.
Harrison, M. P., Rhodes, G. N. Jr., Krueger, W. A., and Hayes, R. M. 1989. Activity of imazethapyr in soybeans. Proc. South. Weed Sci. Soc. 42:57.
Hart, R. G., Lignowski, E. M., and Taylor, F. R. 1991. Imazethapyr herbicide. in Shaner, D. L. and O'Conner, S. L., eds. The Imidazolinone Herbicides. Boca Raton, FL: CRC. Pp. 247256.
Kendig, J. A., Ohmes, G. A., Ezell, P. M., and Barham, R. L. 2000. Performance of imazethapyr in non-flushed, drill-seeded rice. Proc. South. Weed Sci. Soc. 53:37.
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.
Liscano, J. F., Williams, B. J., and Croughan, T. P. 1999. Barnyardgrass (Echinochloa crus-galli) control in dry-seeded imidazolinone tolerant rice. Proc. South. Weed Sci. Soc. 52:13.
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.
Masson, J. A., Webster, E. P., Zhang, W., Lanclos, D. Y., and Morris, S. N. 2000. Evaluation of weed control and crop response to imazethapyr application timings in a water-seeded culture. Proc. Rice Tech. Work. Group. 28:150151.
Ohmes, G. A., Kendig, J. A., Barham, R. L., and Ezell, P. M. 2001. Clearfield vs. Liberty: a comparison of two rice technologies that offer selectve red rice control. Proc. South. Weed Sci. Soc. 54:182.
Ottis, B. V., O'Barr, J. H., McCauley, G. N., and Chandler, J. M. 2002. Clearfield rice tolerance and red rice control with imazethapyr on coarse soils in Texas. Proc. South. Weed Sci. Soc. 55:20.
Richburg, J. S. III, Wilcut, J. W., and Wehtje, G. R. 1993. Toxicity of imazethapyr to purple (Cyperus rotundus) and yellow nutsedges (Cyperus esculentus). Weed Technol. 7:900905.
Scherder, E. F., Talbert, R. E., Lovelace, M. L., and Buehring, N. W. 2001. Weed control programs in herbicide-tolerant rice. Proc. South. Weed Sci. Soc. 54:3940.
Smith, R. J. Jr. 1974. Responses of rice to postemergence treatments of propanil. Weed Sci. 22:563568.
Smith, R. J. Jr. 1988. Weed thresholds in southern U.S. rice, Oryza sativa . Weed Technol. 2:232241.
Stauber, L. G., Smith, R. J. Jr., and Talbert, R. E. 1991. Density and spatial interference of barnyardgrass (Echinochloa crus-galli) with rice (Oryza sativa). Weed Sci. 39:163168.
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. Pp. 7190.
Webster, E. P. and Masson, J. A. 2001. Acetolactate synthase-inhibiting herbicides on imidazolinone-tolerant rice. Weed Sci. 49:652657.
Wepplo, P. J. 1991. Chemical and physical properties of the imidazolinones. in Shaner, D. L. and O'Conner, S. L., eds. The Imidazolinone Herbicides. Boca Raton, FL: CRC. Pp. 1529.

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