Abstract
Field trials were conducted in 1998 and 1999 to determine the effect of delayed burndown timings on weed control and yield of no-tillage glyphosate-resistant corn planted into soybean residue and into a wheat cover crop. Burndown treatments containing glyphosate were applied to both trials when the corn was planted (PRE), when the corn began to emerge (SPIKE), or when the corn had three visible leaves (3-LEAF). As burndown timing was delayed, velvetleaf control increased in corn planted into soybean residue. Glyphosate applied at 0.84 kg ae/ha at the SPIKE or 3-LEAF timing followed by a sequential application of glyphosate at 0.84 kg/ha controlled velvetleaf 91% and corn yields were similar to the weed-free plots. Corn yields among the burndown treatments were directly related to velvetleaf control. In the wheat cover crop trial, wheat treated at the PRE timing was completely controlled and corn yields were similar to the weed-free plots. As burndown timings were delayed, corn emergence and yields were severely reduced. Glyphosate applied at 0.84 kg/ha to 25-cm-wide strips over the corn row at planting and followed with delayed burndown timings increased corn emergence and yield.Nomenclature: Glyphosate, N-(phosphonomethyl)glycine; corn, Zea mays L. DK 493RR; velvetleaf, Abutilon theophrasti Medicus #3 ABUTH; winter wheat, Triticum aestivum L.Additional index words: Herbicide-tolerant crops, living mulch, residual herbicides.Abbreviations: PRE, preemergence; SPIKE, at corn emergence; 3-LEAF, corn with three visible leaves.
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Claims 8
Claim · model-written summary
As burndown timing was delayed, velvetleaf control increased in corn planted into soybean residue.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- burndown timinge1
- Interactor
- velvetleaf
Abutilon theophrastie1weed - Outcome
- velvetleaf controle1
- Direction
- increasede1
- Setting
- soybean residuee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“As burndown timing was delayed, velvetleaf control increased in corn planted into soybean residue”
Claim · model-written summary
Glyphosate applied at 0.84 kg ae/ha at SPIKE or 3-LEAF timing with a sequential application controlled velvetleaf 91%.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Glyphosate applied at 0.84 kg ae/ha at the SPIKE or 3-LEAF timing followed by a sequential application of glyphosate at 0.84 kg/hae1
- Interactor
- velvetleafAbutilon theophrastie1weed
- Outcome
- velvetleaf controle2
- Direction
- increasee2
- Value
- 91%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Glyphosate applied at 0.84 kg ae/ha at the SPIKE or 3-LEAF timing followed by a sequential application of glyphosate at 0.84 kg/ha controlled velvetleaf 91% and corn yields were similar to the weed-free plots”
e2“As burndown timing was delayed, velvetleaf control increased in corn planted into soybean residue”
Claim · model-written summary
Corn yields after the glyphosate treatment at SPIKE or 3-LEAF timing were similar to the weed-free plots.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Glyphosate applied at 0.84 kg ae/ha at the SPIKE or 3-LEAF timing followed by a sequential application of glyphosate at 0.84 kg/hae1
- Outcome
- corn yieldse1
- Direction
- similare1
- Comparator
- weed-free plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Glyphosate applied at 0.84 kg ae/ha at the SPIKE or 3-LEAF timing followed by a sequential application of glyphosate at 0.84 kg/ha controlled velvetleaf 91% and corn yields were similar to the weed-free plots”
Claim · model-written summary
Corn yields among the burndown treatments were directly related to velvetleaf control.
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- burndown treatmentse1
- Interactor
- velvetleafAbutilon theophrastie1weed
- Outcome
- corn yieldse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Corn yields among the burndown treatments were directly related to velvetleaf control”
Claim · model-written summary
In the wheat cover crop trial, wheat treated at the PRE timing was completely controlled.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- PRE timinge1
- Outcome
- wheat treated at the PRE timinge1
- Qualifier
- completely controllede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In the wheat cover crop trial, wheat treated at the PRE timing was completely controlled”
Claim · model-written summary
In the wheat cover crop trial, corn yields after PRE timing were similar to the weed-free plots.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- PRE timinge1
- Outcome
- corn yieldse1
- Direction
- similare1
- Comparator
- weed-free plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In the wheat cover crop trial, wheat treated at the PRE timing was completely controlled and corn yields were similar to the weed-free plots”
Claim · model-written summary
As burndown timings were delayed, corn emergence and yields were reduced.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- burndown timingse1
- Outcome
- corn emergence and yieldse1
- Direction
- reducede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“As burndown timings were delayed, corn emergence and yields were severely reduced”
Claim · model-written summary
Glyphosate applied at 0.84 kg/ha to 25-cm-wide strips over the corn row at planting, followed by delayed burndown timings, increased corn emergence and yield.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Glyphosate applied at 0.84 kg/ha to 25-cm-wide strips over the corn row at plantinge1
- Outcome
- corn emergence and yielde1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Glyphosate applied at 0.84 kg/ha to 25-cm-wide strips over the corn row at planting and followed with delayed burndown timings increased corn emergence and yield”
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See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.