Control of acetolactate synthase–resistant Palmer amaranth in dry edible bean

Beiermann Clint W.; Creech Cody F.; Knezevic Stevan Z.Jhala Amit J.Harveson RobertLawrence Nevin C.

首页> 外文期刊>Weed Technology: A journal of the Weed Science Society of America >Control of acetolactate synthase–resistant Palmer amaranth in dry edible bean

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Control of acetolactate synthase–resistant Palmer amaranth in dry edible bean

机译：Control of acetolactate synthase–resistant Palmer amaranth in dry edible bean

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Abstract Herbicide-resistant Palmer amaranth is a troublesome weed in several agronomic crops and is a relatively new challenge to dry bean production in western Nebraska. Objectives were to evaluate preemergence (PRE) and postemergence (POST) herbicides for control of acetolactate synthase–resistant Palmer amaranth and their effect on Palmer amaranth density and biomass as well as dry bean injury and yield in western Nebraska. Field experiments were conducted in 2017 and 2019 near Scottsbluff, NE. The experiments were arranged as a two-factor strip-plot design. The strip-plot factor consisted of no-PRE or pendimethalin (1,070 g ai ha–1) + dimethenamid-P (790 g ai h–1) applied PRE. The main-plot factor was POST herbicides, which consisted of various mixtures of imazamox, bentazon, or fomesafen applied in a single or sequential application at labeled rates, and reduced rates of imazamox (9 g ai ha–1) + bentazon (314 g ai ha–1) + fomesafen (70 g ai ha–1) applied in single or sequential (two or three) applications. PRE herbicides reduced Palmer amaranth density and biomass during both years and increased dry bean yield in 2017. POST treatments containing fomesafen improved Palmer amaranth control compared with treatments containing imazamox and bentazon only. The sequential-application reduced-rate POST system did not improve Palmer amaranth control compared to one POST application containing fomesafen at a labeled rate in either year. Using pendimethalin + dimethenamid-P PRE followed by POST treatments containing imazamox + bentazon + fomesafen at a labeled rate provided 86 and 99 Palmer amaranth control in 2017 and 2019, respectively.

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《Weed Technology: A journal of the Weed Science Society of America》 |2022年第5期|685-691|共7页
作者
Beiermann Clint W.; Creech Cody F.; Knezevic Stevan Z.Jhala Amit J.Harveson RobertLawrence Nevin C.;
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作者单位

University of Nebraska–Lincoln;

Montana State University;

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正文语种英语
中图分类植物保护;
关键词
bentazon; dimethenamid-P; fomesafen; imazamox; pendimethalin; Palmer amaranth; Amaranthus palmeri S. Watson; dry bean; Phaseolus vulgaris L.; Biomass; crop injury; density; PRE followed by POST; sequential applications;

Control of acetolactate synthase–resistant Palmer amaranth in dry edible bean

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