Skip to main content
×
Home
    • Aa
    • Aa

Imidazolinone-Tolerant Rice Response to Imazethapyr Application

  • Ronald J. Levy (a1), Jason A. Bond (a2), Eric P. Webster (a3), James L. Griffin (a3), Wei P. Zhang (a3) and Steven D. Linscombe (a4)...
Abstract

Greenhouse research was conducted to evaluate shoot and root growth response of imidazolinone-tolerant (IT) rice cultivars to imazethapyr applied postemergence at various rates and application timings. Imazethapyr was applied at 70, 140, and 280 g ai/ha to IT cultivars ‘CL 121’ and ‘CL 161’ in the one- to two-leaf and three- to four-leaf growth stages. Imazethapyr applied to one- to two-leaf or three- to four-leaf rice at 70, 140, and 280 g/ha was more injurious to CL 121 than to CL 161. At 3 wk after treatment (WAT), CL 121 was injured 23 to 38% regardless of application timing. In contrast, CL 161 was injured no more than 11% at 3 WAT. Shoot:root ratio for CL 161 was not affected by imazethapyr application. For CL 121, shoot:root ratio was lower following imazethapyr at 280 g/ha than at 70 or 140 g/ha. Based on shoot fresh weight following imazethapyr at 70 g/ha, CL 161 was 1.8 times more tolerant than CL 121 at 2 WAT and 1.3 times more tolerant at 3 WAT. The IT rice cultivar CL 161 is inherently more tolerant to imazethapyr than is CL 121 based on visual injury and shoot and root growth.

Copyright
Corresponding author
Corresponding author's E-mail: JBond@agcenter.lsu.edu
Footnotes
Hide All
1 Published with the approval of the Director of the Agricultural Experiment Station, Louisiana State University AgCenter, manuscript 05-61-0493.
Footnotes
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

S. G. Carmer , W. E. Nyquist , and W. M. Walker 1989. Least significant difference for combined analysis of experiments with two- or three-factor treatment designs. Agron. J. 81:665672.

A. G. Hager , L. M. Wax , G. A. Bolero , and E. W. Stoller 2003. Influence of diphenylether herbicide application rate and timing on common waterhemp (Amaranthus rudis) control in soybean (Glycine max). Weed Technol. 17:1420.

J. A. Masson and E. P. Webster 2001. Use of imazethapyr in water-seeded imidazolinone-tolerant rice (Oryza sativa). Weed Technol. 15:103106.

K. J. Pellerin , E. P. Webster , W. Zhang , and D. C. Blouin 2003. Herbicide mixtures in water-seeded imidazolinone-resistant rice (Oryza sativa). Weed Technol. 17:836841.

K. J. Pellerin , E. P. Webster , W. Zhang , and D. C. Blouin 2004. Potential use of imazethapyr mixtures in drill-seeded imidazolinone-resistant rice (Oryza sativa) production. Weed Technol. 18:10371042.

E. P. Webster and J. A. Masson 2001. Acetolactate synthase-inhibiting herbicides on imidazolinone-tolerant rice. Weed Sci. 49:652657.

W. Zhang and E. P. Webster 2002. Shoot and root growth of rice (Oryza sativa) in response to V-10029. Weed Technol. 16:768772.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Weed Technology
  • ISSN: 0890-037X
  • EISSN: 1550-2740
  • URL: /core/journals/weed-technology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords:

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 4 *
Loading metrics...

Abstract views

Total abstract views: 27 *
Loading metrics...

* Views captured on Cambridge Core between 20th January 2017 - 22nd July 2017. This data will be updated every 24 hours.