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Suppression of Red Rice (Oryza sativa) Seed Production with Fluazifop and Quizalofop

Published online by Cambridge University Press:  12 June 2017

Frederick P. Salzman ,
Roy J. Smith Jr.  and
Ronald E. Talbert
Frederick P. Salzman
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72701
Roy J. Smith Jr.
Affiliation:
Dep. Agron., Univ. Arkansas, Fayetteville, AR 72701
Ronald E. Talbert
Affiliation:
U.S. Dep. Agric., Stuttgart, AR 72160
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Abstract

Field research was conducted in 1985 and 1986 to compare the efficacy of fluazifop and quizalofop on production of panicles and seeds of red rice. Single and first sequential treatments were applied to red rice in the early-tillering, midtillering, and panicle initiation stages of growth. Sequential treatments were applied 14 days after each earlier application to red rice in the midtillering, late-tillering, and early-heading growth stages, respectively. Both herbicides were applied singly or sequentially at 70, 140, and 280 g/ha. Sequential applications of fluazifop and quizalofop at 280 g/ha caused the greatest reduction of red rice panicle and seed production. Fluazifop at 280 g/ha applied sequentially reduced panicle production 75 to 80% and seed production 80%; 140 g/ha applied sequentially reduced seed production 83%. Quizalofop at 280 g/ha applied sequentially reduced panicle production 75 to 100% and seed production 91%. Sequential applications of either herbicide applied to red rice plants in the panicle initiation and early-heading growth stages were the most effective treatments.

Keywords

Fluazifop, (±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acidquizalofop, (±)-2-[4-[(6-chloro-2-quinoxalinyl)oxy] phenoxy] propanoic acidred rice, Oryza sativa L. # ORYSA ‘Strawhull’ biotypeWeed controlplant growth regulatorsORYSA
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 36 , Issue 6 , November 1988 , pp. 800 - 803
Copyright
Copyright © 1988 by the Weed Science Society of America 

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