Auxin‐based herbicide program for weed control in auxin resistant soybean

Abstract Soybean [Glycine max (L.) Merr.] cultivars resistant to synthetic auxin herbicides have provided another mode of action for the postemergence broadleaf weed control. This field study was conducted at three South Dakota locations [Northeast, NERF; east‐central, ARF; and Southeast, SERF) in 2...

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Main Authors: Joy Amajioyi, Thandiwe Nleya, Graig Reicks, Janet Moriles‐Miller, David Clay, Sharon Clay
Format: Article
Language:English
Published: Wiley 2022-01-01
Series:Agrosystems, Geosciences & Environment
Online Access:https://doi.org/10.1002/agg2.20299
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author Joy Amajioyi
Thandiwe Nleya
Graig Reicks
Janet Moriles‐Miller
David Clay
Sharon Clay
author_facet Joy Amajioyi
Thandiwe Nleya
Graig Reicks
Janet Moriles‐Miller
David Clay
Sharon Clay
author_sort Joy Amajioyi
collection DOAJ
description Abstract Soybean [Glycine max (L.) Merr.] cultivars resistant to synthetic auxin herbicides have provided another mode of action for the postemergence broadleaf weed control. This field study was conducted at three South Dakota locations [Northeast, NERF; east‐central, ARF; and Southeast, SERF) in 2019 and two locations (ARF and SERF) in 2020. The Enlist E3 and Roundup Ready 2 Xtend cultivars were planted at three dates (early, mid‐, and late season) to examine weed control, agronomic characteristics, nodulation, and yield. Preemergence (PRE) treatment was flumioxazin + metribuzin + S‐metolachlor + glyphosate + pendimethalin. Two postemergence (POST) treatments, based on cultivar, were compared with PRE‐only. The PRE‐only treatment had numerous grasses {including green foxtail [Setaria viridis (L.) P. Beauv.] and yellow foxtail [S. pumila (Poir.) Roem. & Schult.], volunteer corn (Zea mays L.), barnyard grass [Echinochola crus‐galli (L.) Beauv.], large crabgrass [Digitaria sanguinalis (L.) Scop.], woolly cupgrass [Eriochloa villosa (Thunb.) Kunth]} and broadleaf weeds (including redroot pigweed [Amaranthus retroflexus L.], common lambsquarters [Chenopodium album L.], waterhemp [Amaranthus rudis Sauer]) with high density and biomass. POST treatments controlled most of the broadleaf species, although some grasses remained. Yields were similar within a location and year, although differences occurred among planting dates. In 2019, planting date did not influence final yield at ARF (average yield 3,084 kg ha−1). Yield was greatest for the early (NERF) and mid‐planting dates (NERF and SERF) compared with late‐season planting. In 2020, dry conditions occurred, and yields at ARF and SERF were lowest for the late‐season plantings (ranging from 37 to 73% lower depending on cultivar) compared with the early season planting. In 2020, dicamba + glyphosate treatment of the Xtend cultivar had 10% (ARF) and 20% (SERF) greater yield than the acifluorfen + clethodim treatment.
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spelling doaj.art-f56312334dbc493080fdcf44983613df2022-12-22T04:41:27ZengWileyAgrosystems, Geosciences & Environment2639-66962022-01-0154n/an/a10.1002/agg2.20299Auxin‐based herbicide program for weed control in auxin resistant soybeanJoy Amajioyi0Thandiwe Nleya1Graig Reicks2Janet Moriles‐Miller3David Clay4Sharon Clay5Dep. of Agronomy, Horticulture, and Plant Science South Dakota State Univ. Brookings SD 57006 USADep. of Agronomy, Horticulture, and Plant Science South Dakota State Univ. Brookings SD 57006 USADep. of Agronomy, Horticulture, and Plant Science South Dakota State Univ. Brookings SD 57006 USADep. of Agronomy, Horticulture, and Plant Science South Dakota State Univ. Brookings SD 57006 USADep. of Agronomy, Horticulture, and Plant Science South Dakota State Univ. Brookings SD 57006 USADep. of Agronomy, Horticulture, and Plant Science South Dakota State Univ. Brookings SD 57006 USAAbstract Soybean [Glycine max (L.) Merr.] cultivars resistant to synthetic auxin herbicides have provided another mode of action for the postemergence broadleaf weed control. This field study was conducted at three South Dakota locations [Northeast, NERF; east‐central, ARF; and Southeast, SERF) in 2019 and two locations (ARF and SERF) in 2020. The Enlist E3 and Roundup Ready 2 Xtend cultivars were planted at three dates (early, mid‐, and late season) to examine weed control, agronomic characteristics, nodulation, and yield. Preemergence (PRE) treatment was flumioxazin + metribuzin + S‐metolachlor + glyphosate + pendimethalin. Two postemergence (POST) treatments, based on cultivar, were compared with PRE‐only. The PRE‐only treatment had numerous grasses {including green foxtail [Setaria viridis (L.) P. Beauv.] and yellow foxtail [S. pumila (Poir.) Roem. & Schult.], volunteer corn (Zea mays L.), barnyard grass [Echinochola crus‐galli (L.) Beauv.], large crabgrass [Digitaria sanguinalis (L.) Scop.], woolly cupgrass [Eriochloa villosa (Thunb.) Kunth]} and broadleaf weeds (including redroot pigweed [Amaranthus retroflexus L.], common lambsquarters [Chenopodium album L.], waterhemp [Amaranthus rudis Sauer]) with high density and biomass. POST treatments controlled most of the broadleaf species, although some grasses remained. Yields were similar within a location and year, although differences occurred among planting dates. In 2019, planting date did not influence final yield at ARF (average yield 3,084 kg ha−1). Yield was greatest for the early (NERF) and mid‐planting dates (NERF and SERF) compared with late‐season planting. In 2020, dry conditions occurred, and yields at ARF and SERF were lowest for the late‐season plantings (ranging from 37 to 73% lower depending on cultivar) compared with the early season planting. In 2020, dicamba + glyphosate treatment of the Xtend cultivar had 10% (ARF) and 20% (SERF) greater yield than the acifluorfen + clethodim treatment.https://doi.org/10.1002/agg2.20299
spellingShingle Joy Amajioyi
Thandiwe Nleya
Graig Reicks
Janet Moriles‐Miller
David Clay
Sharon Clay
Auxin‐based herbicide program for weed control in auxin resistant soybean
Agrosystems, Geosciences & Environment
title Auxin‐based herbicide program for weed control in auxin resistant soybean
title_full Auxin‐based herbicide program for weed control in auxin resistant soybean
title_fullStr Auxin‐based herbicide program for weed control in auxin resistant soybean
title_full_unstemmed Auxin‐based herbicide program for weed control in auxin resistant soybean
title_short Auxin‐based herbicide program for weed control in auxin resistant soybean
title_sort auxin based herbicide program for weed control in auxin resistant soybean
url https://doi.org/10.1002/agg2.20299
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AT davidclay auxinbasedherbicideprogramforweedcontrolinauxinresistantsoybean
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