Effect of Row Spacing, Seeding Rate, and Herbicide Program in Glufosinate-Resistant Soybean on Palmer Amaranth Management

Bell, Holden D.; Norsworthy, Jason K.; Scott, Robert C.; Popp, Michael P.

doi:10.1614/wt-d-14-00156.1

Cited by 13 publications

(16 citation statements)

References 42 publications

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“…Growers can better utilize canopy closure by decreasing row spacing and/or increasing seeding rate, which promotes early canopy closure by increasing leaf area index Bertram and Pederson 2004;Burnside and Colville 1964;Harder et al 2007;Yelverton and Coble 1991). In midsouthern U.S. production systems, soybean is primarily grown on rows spaced 97 cm apart, resulting in soybean taking 50 to 80 d after planting to reach full canopy formation under irrigated conditions (Bell et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Impact of postemergence herbicides on soybean injury and canopy formation

et al. 2020

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Abstract Field studies were conducted in 2017 and 2018 in Arkansas to evaluate the injury caused by herbicides on soybean canopy formation and yield. Fomesafen, acifluorfen, S-metolachlor + fomesafen, and S-metolachlor + fomesafen + chlorimuron alone and in combination with glufosinate were applied to glufosinate-resistant soybean at the V2 growth stage. Soybean injury resulting from these labeled herbicide treatments ranged from 9% to 25% at 2 wk after application. This level of injury resulted in a 4-, 5-, 6-, and 6-d delay in soybean reaching 80% groundcover following fomesafen, acifluorfen, S-metolachlor + fomesafen, and S-metolachlor + fomesafen + chlorimuron, respectively. There was a 2-d delay in soybean reaching a canopy volume of 15,000 cm3 following each of the four herbicide treatments. The addition of glufosinate to the herbicide applications resulted in longer delays in canopy formation with every herbicide treatment except glufosinate + fomesafen. Fomesafen, acifluorfen, S-metolachlor + fomesafen, and S-metolachlor + fomesafen + chlorimuron, each applied with glufosinate, delayed soybean from reaching 80% groundcover by 2, 7, 8, and 9 d, respectively, and delayed the number of days for soybean to reach a canopy volume of 15,000 cm3 by 2, 3, 2, and 2 d, respectively. No yield loss occurred with any herbicide application. A delay in percent groundcover in soybean allows sunlight to reach the soil surface for longer periods throughout the growing season, possibly promoting late-season weed germination and the need for an additional POST herbicide application.

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Section: Introductionmentioning

confidence: 99%

Impact of postemergence herbicides on soybean injury and canopy formation

et al. 2020

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“…Full-season control of glyphosate-resistant Palmer amaranth exceeded 80% only for herbicide programs where an effective PRE herbicide treatment was followed with a POST fomesafen application (Miller and Norsworthy 2016). Bell, Norsworthy, Scott, and Popp (2015) also determined that programs containing both PRE and POST herbicides provided better Palmer amaranth control than a POST-only program, and had much greater influence on control than did soybean row spacing or seeding rate.…”

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confidence: 99%

“…These characteristics, and widespread herbicide resistance, drive the need to use multiple applications and incorporate multiple–site-of-action herbicides for effective control of Palmer amaranth and common waterhemp (Anonymous 2013, 2016). The more effective herbicide programs include residual herbicides applied at the time of soybean planting followed by a POST herbicide applied to small weeds in combination with a residual herbicide (Bell, Norsworthy, Scott, and Popp 2015). Including herbicides with residual activity in POST treatments can minimize the need for a subsequent application.…”

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Influence of Cover Crops on Management of Amaranthus Species in Glyphosate- and Glufosinate-Resistant Soybean

et al. 2017

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A field study was conducted for the 2014 and 2015 growing season in Arkansas, Indiana, Illinois, Missouri, Ohio, and Tennessee to determine the effect of cereal rye and either oats, radish, or annual ryegrass on the control of Amaranthus spp. when integrated with comprehensive herbicide programs in glyphosate-resistant and glufosinate-resistant soybean. Amaranthus species included redroot pigweed, waterhemp, and Palmer amaranth. The two herbicide programs included were: a PRE residual herbicide followed by POST application of foliar and residual herbicide (PRE/POST); or PRE residual herbicide followed by POST application of foliar and residual herbicide, followed by another POST application of residual herbicide (PRE/POST/POST). Control was not affected by type of soybean resistance trait. At the end of the season, herbicides controlled 100 and 96% of the redroot pigweed and Palmer amaranth, respectively, versus 49 and 29% in the absence of herbicides, averaged over sites and other factors. The PRE/POST and PRE/POST/POST herbicide treatments controlled 83 and 90% of waterhemp at the end of the season, respectively, versus 14% without herbicide. Cover crop treatments affected control of waterhemp and Palmer amaranth and soybean yield, only in the absence of herbicides. The rye cover crop consistently reduced Amaranthus spp. density in the absence of herbicides compared to no cover treatment.

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“…However, linear regressions highlighting the 0.25 m spacing between rows of soybeans in Arapoti (PR-Brazil), diverge from Bell et al [11]. At two densities in the 2012 and 2013 (Arkansas-USA) crops, the authors state that the best yields were reached 0.45 m row spacing.…”

Section: Resultsmentioning

confidence: 79%

“…Testing the spacing between soybean rows of 0.19, 0.45 and 0.90 m at two densities in the 2012 and 2013 (Arkansas-USA) crops, Bell et al [11] argue that the best yields reached 0.45 m row spacing, in the two crop seasons. As in all soybean production areas, in Brazil we have been observing an important role of spacing between rows on crop yield.…”

Section: Introductionmentioning

confidence: 99%

Spacing between Soybean Rows

Garcia¹,

Frare²,

Inagaki³

et al. 2018

AJPS

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The soybean crop has great economical importance in Brazil and in the world. In order to make the crop production profitable, several factors must be considered. The objective of this study was to evaluate the impact of spacing between soybean crop rows (Glycine max). The experiment was installed in the Mutuca farm (Arapoti-PR, southern Brazil), in the crop seasons of 2012/2013 (four seeding seasons) and 2013/2014 (two seeding seasons), in a completely randomized blocks design. We used four treatments and six replicates. The treatments were the spacing between rows as follow: 0.25, 0.50, 0.75 and 1.00 m. The variables evaluated were: initial and final plant population, plant height, number of internodes, viable internodes, pods per plant, grains per pod, mass of thousand grains and crop productivity. We concluded that the reduction of the spacing between rows significantly increased, in most part of the crop seasons, the number of pods per plants and the crop productivity.

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Effect of Row Spacing, Seeding Rate, and Herbicide Program in Glufosinate-Resistant Soybean on Palmer Amaranth Management

Cited by 13 publications

References 42 publications

Impact of postemergence herbicides on soybean injury and canopy formation

Impact of postemergence herbicides on soybean injury and canopy formation

Influence of Cover Crops on Management of Amaranthus Species in Glyphosate- and Glufosinate-Resistant Soybean

Spacing between Soybean Rows

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