Weed Control and Crop Response to Glufosinate Applied to 'PHY 485 WRF' Cotton

Culpepper A. Stanley; York Alan C.; Roberts PhillipWhitaker Jared R.

首页> 外文期刊>Weed Technology: A journal of the Weed Science Society of America >Weed Control and Crop Response to Glufosinate Applied to 'PHY 485 WRF' Cotton

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Weed Control and Crop Response to Glufosinate Applied to 'PHY 485 WRF' Cotton

机译：Weed Control and Crop Response to Glufosinate Applied to 'PHY 485 WRF' Cotton

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Field experiments were conducted in Georgia to evaluate weed control and crop tolerance with glufosinate applied to 'PHY 485 WRF (R)' cotton. This glyphosate-resistant cotton also contains a gene, used as a selectable marker, for glufosinate resistance. Three experiments were maintained weed-free and focused on crop tolerance; a fourth experiment focused on control of pitted morningglory and glyphosate-resistant Palmer amaranth. In two experiments, PHY 485 WRF cotton was visibly injured 15 and 20% or less by glufosinate ammonium salt at 430 and 860 g ae/ha, respectively, applied POST two or three times. In a third experiment, glufosinate at 550 g/ha injured cotton up to 36%. Pyrithiobac or glyphosate mixed with glufosinate did not increase injury compared to glufosinate applied alone; S-metolachlor mixed with glufosinate increased injury by six to seven percentage points. Cotton injury was not detectable 14 to 21 d after glufosinate application, and cotton yields were not reduced by glufosinate or glufosinate mixtures. A program of pendimethalin PRE, glyphosate applied POST twice, and diuron plus MSMA POST-directed controlled glyphosate-resistant Palmer amaranth only 17% late in the season. S-metolachlor included with the initial glyphosate application did not increase control, and pyrithiobac increased late-season control by only 13 percentage points. Palmer amaranth was controlled 90% or more when glufosinate replaced glyphosate in the aforementioned system. Pitted morningglory was controlled 99% by all glufosinate programs and mixtures of glyphosate plus pyrithiobac. Seed cotton yields with glufosinate-based systems were at least 3.3 times greater than yields with glyphosate-based systems because of differences in control of glyphosate-resistant Palmer amaranth.

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《Weed Technology: A journal of the Weed Science Society of America》 |2009年第3期|356-362|共7页
作者
Culpepper A. Stanley; York Alan C.; Roberts PhillipWhitaker Jared R.;
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作者单位

Department of Crop and Soil Sciences, University of Georgia, P.O. Box 748, Tifton, GA 31794;

Department of Crop Science, North Carolina State University, P.O. Box 7620, Raleigh, NC 27695;

Department of Entomology, University of Georgia, P.O. Box 748, Tifton, GA 31794;

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正文语种英语
中图分类植物保护;
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Agronomy: Agriculture; Pesticides; Pest Assessment Control and Management;

Weed Control and Crop Response to Glufosinate Applied to 'PHY 485 WRF' Cotton

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