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1 January 2012 Economic Evaluations of Imazethapyr Rates and Timings on Rice
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Abstract

Field studies were conducted in Crowley, LA, and Stoneville, MS, in drill-seeded rice to evaluate economical returns of weed control with imazethapyr. Red rice and barnyardgrass control was evaluated with imazethapyr alone at various rates and application timings. Imazethapyr, averaged across rate, controlled red rice 89% and barnyardgrass 90% when the initial application of imazethapyr was applied at emergence followed by a second application of imazethapyr 2 wk later. No difference in red rice and barnyardgrass control was observed with imazethapyr, averaged across timing. Yield and economical returns were maximized when the initial application of imazethapyr was applied at rice emergence followed by a second application of imazethapyr 2 wk later.

Nomenclature: Imazethapyr; barnyardgrass, Echinochloa crus-galli (L.) Beauv.; red rice, Oryza sativa L.; rice, Oryza sativa L.

Weed Science Society of America
Tyler P. Carlson, Eric P. Webster, Michael E. Salassi, Jason A. Bond, Justin B. Hensley, and David C. Blouin "Economic Evaluations of Imazethapyr Rates and Timings on Rice," Weed Technology 26(1), 24-28, (1 January 2012). https://doi.org/10.1614/WT-D-11-00019.1
Received: 16 February 2011; Accepted: 1 September 2011; Published: 1 January 2012
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