Evaluation of 2,4-D–based Herbicide Mixtures for Control of Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri)

Benjamin H. Lawrence; Jason A. Bond; Thomas W. Eubank

首页> 外文期刊>Weed Technology: A journal of the Weed Science Society of America >Evaluation of 2,4-D–based Herbicide Mixtures for Control of Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri)

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Evaluation of 2,4-D–based Herbicide Mixtures for Control of Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri)

机译：Evaluation of 2,4-D–based Herbicide Mixtures for Control of Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri)

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Understanding control of glyphosate-resistant (GR) Palmer amaranth with multiple herbicide sites of action, including synthetic auxins, is crucial for growers to minimize GR Palmer amaranth interference with crops. Field studies in 2013 and 2014 and agreenhouse study in 2014 were conducted in Stoneville, MS, to evaluate POST control of GR Palmer amaranth with 2,4-D alone and in mixtures with glyphosate and/or glufosinate. In the greenhouse study, control of 5- and 10-cm GR Palmer amaranth was 87% with 2,4-D at 0.84 kg ae ha~(-1). Dry weight reduction of GR Palmer amaranth was ≥81% with 2,4-D at 0.84 kg ha~(-1). In field studies, mixtures of glufosinate at 0.59 kg ai ha~(-1) and 2,4-D at 0.56 or 1.12 kg ae ha~(-1) controlled 5- to 10-cm GR Palmer amaranth 87% at 28 d after treatment (DAT). Averaged across glyphosate treatments, glufosinate applied alone applied to 5- to 10-cm GR Palmer amaranth reduced dry weight at 28 DAT to 20 g m~(-2) from 82 g m~(-2) and was comparable with that following 2,4-D applied alone at 1.12 kg ae ha~(-1) and mixtures of glufosinate plus 2,4-D at 0.56 and 1.12 kg ae ha~(-1). Mixtures of 2,4-D plus glufosinate provided ≥92% control of 15- to 20-cm GR Palmer amaranth at 28 DAT. When applied to 15- to 20-cm plants, mixtures of 2,4-D plus glufosinate reduced GR Palmer amaranth density to ≤5 plants m~(-2) compared with 65 plants m~(-2) where no 2,4-D or glufosinate was applied. Glufosinate and 2,4-D are viable control options for 5- to 10-cm or 15- to 20-cm GR Palmer amaranth. However, 2,4-D did not improve GR Palmer amaranth control when added to any herbicide mixture except glyphosate and glufosinate applied to 15- to 20-cm plants at the 28 DAT evaluation.

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《Weed Technology: A journal of the Weed Science Society of America》 |2019年第2期|263-271|共9页
作者
Benjamin H. Lawrence; Jason A. Bond; Thomas W. Eubank;
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作者单位

Research Associate II, Department of Plant and Soil Sciences, Mississippi State University, Delta Research and Extension Center, Stoneville, MS, USA;

Research/Extension Professor, Department of Plant and Soil Sciences, Mississippi State University, Delta Research and Extension Center, Stoneville, MS, USA;

Former Assistant Extension/Research Professor, Department of Plant and Soil Sciences, Mississippi State University, Delta Research and Extension Center, Stoneville, MS, USA;

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正文语种英语
中图分类植物保护;
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David Johnson; Pioneer/DuPontr; 2 4-D; glyphosate; glufosinate; Palmer amaranth Amaranthus palmeri (S.) Watson AMAPA; Greenhouse; herbicide interactions; herbicide rate;

Evaluation of 2,4-D–based Herbicide Mixtures for Control of Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri)

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