Abstract
Field experiments were conducted in 1998 and 1999 at two locations in Mississippi to determine weed control efficacy of postemergence soybean herbicides alone or following pendimethalin imazaquin preemergence in glufosinate-tolerant soybean planted in 38- or 76-cm rows. Glufosinate applications controlled pitted morningglory better than conventional herbicide treatments, regardless of row spacing. Pendimethalin imazaquin did not increase the efficacy of glufosinate on pitted morningglory. Pitted morningglory control was increased in narrow rows when compared to wide rows with all treatments. Sicklepod control ranged from 90 to 100% in narrow rows with glufosinate, regardless of rate. Residual herbicides alone controlled sicklepod 54%, regardless of row spacing. With grass species, two applications of 420 g ai/ha glufosinate controlled weeds 82 to 100%. Residual herbicides followed by 420 g/ha glufosinate controlled grass species 80% or more, regardless of row spacing. Hemp sesbania control ranged from 80 to 92% in 76- and 38-cm rows with one application of 560 g/ha glufosinate. Glufosinate at 420 g/ha used as sequential applications controlled hemp sesbania better than the conventional treatment in 76-cm rows. Residual herbicides in combination with glufosinate did not increase hemp sesbania control. There were no differences in yield due to row spacing at Stoneville in either year due to extremely dry growing conditions during pod set. At Starkville, two applications of 420 g/ha glufosinate resulted in higher yields than pendimethalin imazaquin followed by 420 g/ha glufosinate in both years. Pendimethalin imazaquin followed by 420 g/ha glufosinate increased yield in narrow rows compared to wide rows at Starkville in 1998.Nomenclature: Glufosinate; imazaquin; pendimethalin; hemp sesbania, Sesbania exaltata (Raf.) Rydb. ex. A. W. Hill #3 SEBEX; pitted morningglory, Ipomoea lacunosa L. # IPOLA; sicklepod, Senna obtusifolia (L.) Irwin and Barnaby # CASOB; soybean, Glycine max (L.) Merr.Additional index words: Glufosinate-tolerant soybean.Abbreviations: POST, postemergence; POST-3, POST application 3 wk after planting; POST-5, POST application 5 wk after planting; PRE, preemergence; WAP, weeks after planting.
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Claims 13
Claim · model-written summary
Glufosinate controlled pitted morningglory better than conventional herbicides across row spacings.
- Taxon
- soybean (Glycine max)
Glycine maxt0 - Treatment
- Glufosinate applicationse0
- Interactor
- pitted morningglorye0weed
- Outcome
- pitted morningglorye0
- Direction
- bettere0
- Comparator
- conventional herbicide treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Glufosinate applications controlled pitted morningglory better than conventional herbicide treatments, regardless of row spacing”
Claim · model-written summary
Pendimethalin imazaquin did not increase glufosinate control of pitted morningglory.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- Pendimethalin imazaquine0
- Interactor
- pitted morningglorye0weed
- Outcome
- efficacy of glufosinate on pitted morningglorye0
- Direction
- did not increasee0
- Comparator
- glufosinatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Pendimethalin imazaquin did not increase the efficacy of glufosinate on pitted morningglory”
Claim · model-written summary
Narrow rows improved pitted morningglory control relative to wide rows under all treatments.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- narrow rowse0
- Interactor
- Pitted morningglorye0weed
- Outcome
- Pitted morningglory controle0
- Direction
- increasede0
- Comparator
- wide rowse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Pitted morningglory control was increased in narrow rows when compared to wide rows with all treatments”
Claim · model-written summary
Glufosinate controlled sicklepod 90 to 100% in narrow rows.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- glufosinatee0
- Interactor
- Sicklepode0weed
- Outcome
- Sicklepod controle0
- Value
- 90 to 100%e0
- Setting
- narrow rowse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Sicklepod control ranged from 90 to 100% in narrow rows with glufosinate, regardless of rate”
Claim · model-written summary
Residual herbicides alone controlled sicklepod by 54%.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- Residual herbicides alonee0
- Interactor
- sicklepode0weed
- Outcome
- controlled sicklepode0
- Value
- 54%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Residual herbicides alone controlled sicklepod 54%, regardless of row spacing”
Claim · model-written summary
Two 420 g ai/ha glufosinate applications controlled grass weeds 82 to 100%.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- two applications of 420 g ai/ha glufosinatee0
- Interactor
- grass speciese0weed
- Outcome
- controlled weedse0
- Value
- 82 to 100%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“With grass species, two applications of 420 g ai/ha glufosinate controlled weeds 82 to 100%”
Claim · model-written summary
Residual herbicides followed by 420 g/ha glufosinate controlled grass species at least 80%.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- Residual herbicides followed by 420 g/ha glufosinatee0
- Interactor
- grass speciese0weed
- Outcome
- controlled grass speciese0
- Value
- 80% or moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Residual herbicides followed by 420 g/ha glufosinate controlled grass species 80% or more, regardless of row spacing”
Claim · model-written summary
One 560 g/ha glufosinate application controlled hemp sesbania by 80 to 92% in both row widths.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- one application of 560 g/ha glufosinatee0
- Interactor
- Hemp sesbaniae0weed
- Outcome
- Hemp sesbania controle0
- Value
- 80 to 92%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Hemp sesbania control ranged from 80 to 92% in 76- and 38-cm rows with one application of 560 g/ha glufosinate”
Claim · model-written summary
Sequential 420 g/ha glufosinate controlled hemp sesbania better than conventional treatment in 76-cm rows.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- Glufosinate at 420 g/ha used as sequential applicationse0
- Interactor
- hemp sesbaniae0weed
- Outcome
- controlled hemp sesbaniae0
- Direction
- bettere0
- Comparator
- conventional treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Glufosinate at 420 g/ha used as sequential applications controlled hemp sesbania better than the conventional treatment in 76-cm rows”
Claim · model-written summary
Combining residual herbicides with glufosinate did not increase hemp sesbania control.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- Residual herbicides in combination with glufosinatee0
- Interactor
- hemp sesbaniae0weed
- Outcome
- hemp sesbania controle0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Residual herbicides in combination with glufosinate did not increase hemp sesbania control”
Claim · model-written summary
Row spacing did not produce yield differences at Stoneville in either year under very dry pod-set conditions.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- row spacinge0
- Outcome
- yielde0
- Direction
- no differencese0
- Qualifier
- extremely dry growing conditions during pod sete0
- Setting
- Stonevillee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“There were no differences in yield due to row spacing at Stoneville in either year due to extremely dry growing conditions during pod set”
Claim · model-written summary
Two 420 g/ha glufosinate applications yielded more than pendimethalin imazaquin followed by 420 g/ha glufosinate at Starkville in both years.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- two applications of 420 g/ha glufosinatee0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- pendimethalin imazaquin followed by 420 g/ha glufosinatee0
- Setting
- Starkvillee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“At Starkville, two applications of 420 g/ha glufosinate resulted in higher yields than pendimethalin imazaquin followed by 420 g/ha glufosinate in both years”
Claim · model-written summary
Pendimethalin imazaquin followed by glufosinate increased soybean yield in narrow relative to wide rows at Starkville in 1998.
- Taxon
- soybean (Glycine max)Glycine maxt0
- Treatment
- Pendimethalin imazaquin followed by 420 g/ha glufosinatee0
- Outcome
- yielde0
- Direction
- increasede0
- Comparator
- wide rowse0
- Setting
- Starkvillee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean (Glycine max)”
e0“Pendimethalin imazaquin followed by 420 g/ha glufosinate increased yield in narrow rows compared to wide rows at Starkville in 1998”
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