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Imazethapyr Application Methods and Sequences for Imidazolinone-Tolerant Rice (Oryza sativa)

Published online by Cambridge University Press:  20 January 2017

Brian V. Ottis ,
James M. Chandler  and
Garry N. McCauley
Brian V. Ottis*
Affiliation:
Department of Soil and Crop Science, Texas A&M University, College Station, TX 77843-2474
James M. Chandler
Affiliation:
Department of Soil and Crop Science, Texas A&M University, College Station, TX 77843-2474
Garry N. McCauley
Affiliation:
Texas A&M Agricultural Research and Extension Center, Eagle Lake, TX 77434
*
Corresponding author's E-mail: bottis@uark.edu
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Abstract

Experiments were conducted at two locations in Texas during 2000 and 2001 to compare barnyardgrass, broadleaf signalgrass, and red rice control; rice tolerance; and grain yield after single and sequential applications of imazethapyr in imidazolinone-tolerant rice. Red rice and barnyardgrass control on a clay soil at Beaumont was at least 94% with imazethapyr at 70, 90, and 100 g ai/ha applied preplant incorporated (PPI) or preemergence (PRE) followed by (fb) at least 40 g/ha of imazethapyr applied early postemergence (EPOST). Broadleaf signalgrass control on a very fine sandy loam soil at Eagle Lake was at least 86% when imazethapyr was applied PPI or PRE fb EPOST applications of imazethapyr. Sequential postemergence applications at Beaumont resulted in at least 95% red rice and barnyardgrass control when 40 g/ha applied late postemergence followed any EPOST application. Sequential postemergence applications at Eagle Lake controlled broadleaf signalgrass 98% during both years. Imazethapyr applied postemergence injured rice 0 to 34% up to 12 d after treatment. Rice yield reductions were correlated to weed control and most likely were not associated with early-season rice injury.

Keywords

Imazethapyrimidazolinonebarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHCGbroadleaf signalgrass, Brachiaria platyphylla (Griseb.) Nash # BRAPPred rice, Oryza sativa L. # ORYSArice, Oryza sativa L. # ORYSACLEARFIELD∗ riceNewpathEPOST, early postemergencefb, followed byLPOST, late postemergencePD, panicle differentiationPPI, preplant incorporatedPRE, preemergence
Type
Research
Information
Weed Technology , Volume 17 , Issue 3 , September 2003 , pp. 526 - 533
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Current address: Altheimer Laboratory, University of Arkansas, 1366 W. Altheimer Drive, Fayetteville, AR 72704.

References

Literature Cited

Burgos, N. R., Norman, R. J., and Gealy, D. R. 2000. Comparative N uptake between red rice and rice. Proc. South. Weed Sci. Soc. 53:149.Google Scholar
Che, M., Loux, M. M., Traina, S. J., and Logan, T. J. 1992. Effect of pH on sorption and desorption of imazaquin and imazethapyr on clays and humic acid. J. Environ. Qual. 21:698–703.Google Scholar
Diarra, A., Smith, R. J. Jr., and Talbert, R. E. 1985a. Growth and morphological characteristics of red rice (Oryza sativa) biotypes. Weed Sci. 33:310–314.CrossRefGoogle Scholar
Diarra, A., Smith, R. J. Jr., and Talbert, R. E. 1985b. Red rice (Oryza sativa) control in drill-seeded rice (O. sativa). Weed Sci. 33:703–707.CrossRefGoogle Scholar
Dillon, T. L., Baldwin, F. L., Talbert, R. E., Estorninos, L. E. Jr., and Gealy, D. R. 2002. Outcrossing between CLEARFIELD* rice and red rice. Proc. South. Weed Sci. Soc. 55:201.Google Scholar
Dillon, T. L., Baldwin, F. L., and Webster, E. P. 1998. Weed control in imi-tolerant rice. Proc. South. Weed Sci. Soc. 51:268.Google Scholar
Dunand, R. T., Baker, J. B., Sonnier, E. A., and Dilly, R. R. 1985. Cultural management for red rice control in rice. La. Agric. 29/2:20–21.Google Scholar
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.Google Scholar
Jourdan, S. W., Majek, B. A., and Ayeni, A. O. 1998. Imazethapyr bioactivity and movement in soil. Weed Sci. 46:608–613.CrossRefGoogle Scholar
Kwon, S. L., Smith, R. J. Jr., and Talbert, R. E. 1991. Red rice (Oryza sativa) control and suppression in rice (O. sativa). Weed Technol. 5:811–816.Google Scholar
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. 15:315–319.Google Scholar
McGregor, J. T. Jr., Smith, R. J. Jr., and Talbert, R. E. 1988. Broadleaf signalgrass (Brachiaria platyphylla) duration of interference in rice (Oryza sativa). Weed Sci. 36:747–750.CrossRefGoogle Scholar
Sanders, D. E., Strahan, R. E., Linscombe, S. D., and Croughan, T. P. 1998. Control of red rice (Oryza sativa) in imidazolinone tolerant rice. Proc. South. Weed Sci. Soc. 51:36–37.Google Scholar
Smith, R. J. Jr. 1981. Control of red rice (Oryza sativa) in water-seeded rice (O. sativa). Weed Sci. 29:663–666.CrossRefGoogle Scholar
Smith, R. J. Jr. 1988. Weed thresholds in southern U.S. rice, Oryza sativa . Weed Technol. 2:232–241.Google Scholar
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. 39:163–168.Google Scholar
Steele, G. L., Chandler, J. M., McCauley, G. N., and Tingle, C. H. 2000. Red rice (Oryza sativa L.) control with varying rates and application timings of imazethapyr. Proc. South. Weed Sci. Soc. 53:19.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.CrossRefGoogle Scholar
Webster, T. M. 2000. The southern states 10 most common and troublesome weeds in rice. Proc. South. Weed Sci. Soc. 53:247–274.Google Scholar
White, R. H. and Hackworth, H. M. 1999. Weed control with imidazolinone tolerant rice. Proc. South. Weed Sci. Soc. 52:185.Google Scholar