Abstract
Abstract Dicamba-resistant soybean was developed and commercialized by Monsanto in 2016, and in recent years, barnyardgrass has become more troublesome for growers who use residual herbicides with dicamba technology. Field studies were conducted from 2019 to 2021 in Stoneville, Mississippi, to evaluate barnyardgrass control after applications of glyphosate or glyphosate + dicamba, when mixed with residual herbicides, and when applied sequentially. In the first field study, glyphosate (1,120 g ae ha −1 ) and glyphosate + dicamba (560 g ae ha −1 ) were applied in combination with common residual herbicides. The second field study included an initial treatment with glyphosate (1,120 g ha −1 ), glyphosate + dicamba (560 g ha −1 ), and glyphosate + dicamba + S -metolachlor (1,064 g ai ha −1 ) followed by a sequential treatment of glyphosate or glyphosate + dicamba at 3 and 7 d after an initial herbicide treatment. Results indicated that glyphosate alone provided greater barnyardgrass control than glyphosate + dicamba. Additionally, at 28 d after treatment, pyroxasulfone, pyroxasulfone + fluthiacet, dimethenamid-P, and S -metolachlor did not affect postemergence control of barnyardgrass after glyphosate + dicamba treatments. Furthermore, sequential herbicide treatments of glyphosate or glyphosate + dicamba led to no difference in barnyardgrass control 28 d after the sequential treatment. These results indicate that options exist for adding residual herbicides to glyphosate + dicamba treatments and that sequential treatments of glyphosate or glyphosate + dicamba are important for optimizing barnyardgrass control.
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Claims 6
Claim · model-written summary
Glyphosate alone gave greater barnyardgrass control than glyphosate + dicamba in soybean.
- Taxon
- soybean
Glycine maxt0 - Treatment
- glyphosate alonee0
- Interactor
- barnyardgrass
Echinochloa crus-gallie0weed - Outcome
- barnyardgrass controle0
- Direction
- greatere0
- Comparator
- glyphosate + dicambae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“dicamba-resistant soybean”
e0“Results indicated that glyphosate alone provided greater barnyardgrass control than glyphosate + dicamba”
Claim · model-written summary
Pyroxasulfone, pyroxasulfone + fluthiacet and dimethenamid-P did not affect postemergence barnyardgrass control 28 d after glyphosate + dicamba treatments.
- Taxon
- soybeanGlycine maxt0
- Treatment
- pyroxasulfone, pyroxasulfone + fluthiacet, dimethenamid-Pe1
- Interactor
- barnyardgrassEchinochloa crus-gallie1weed
- Outcome
- postemergence control of barnyardgrasse1
- Direction
- did not affecte1
- Comparator
- glyphosate + dicamba treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“dicamba-resistant soybean”
e1“pyroxasulfone, pyroxasulfone + fluthiacet, dimethenamid-P, and S -metolachlor did not affect postemergence control of barnyardgrass after glyphosate + dicamba treatments”
Claim · model-written summary
S-metolachlor did not affect postemergence barnyardgrass control after glyphosate + dicamba treatments.
- Taxon
- soybeanGlycine maxt0
- Treatment
- S -metolachlore1
- Interactor
- barnyardgrassEchinochloa crus-gallie1weed
- Outcome
- postemergence control of barnyardgrasse1
- Direction
- did not affecte1
- Comparator
- glyphosate + dicamba treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“dicamba-resistant soybean”
e1“pyroxasulfone, pyroxasulfone + fluthiacet, dimethenamid-P, and S -metolachlor did not affect postemergence control of barnyardgrass after glyphosate + dicamba treatments”
Claim · model-written summary
Sequential herbicide treatments of glyphosate or glyphosate + dicamba gave no difference in barnyardgrass control 28 d after the sequential treatment.
- Taxon
- soybeanGlycine maxt0
- Treatment
- sequential herbicide treatments of glyphosate or glyphosate + dicambae2
- Interactor
- barnyardgrassEchinochloa crus-gallie2weed
- Outcome
- barnyardgrass controle2
- Direction
- no differencee2
- Qualifier
- 28 d after the sequential treatmente2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“dicamba-resistant soybean”
e2“sequential herbicide treatments of glyphosate or glyphosate + dicamba led to no difference in barnyardgrass control 28 d after the sequential treatment”
Claim · model-written summary
Sequential treatments of glyphosate or glyphosate + dicamba are important for optimizing barnyardgrass control in soybean.
- Taxon
- soybeanGlycine maxt0
- Outcome
- optimizing barnyardgrass controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“dicamba-resistant soybean”
e4“sequential treatments of glyphosate or glyphosate + dicamba are important for optimizing barnyardgrass control”
Claim · model-written summary
Residual herbicides can be added to glyphosate + dicamba treatments in soybean.
- Taxon
- soybeanGlycine maxt0
- Outcome
- options exist for adding residual herbicides to glyphosate + dicamba treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“dicamba-resistant soybean”
e3“options exist for adding residual herbicides to glyphosate + dicamba treatments”
The same questions in other papers
metolachlor · Echinochloa crus-galli · Glycine max (soybean)Positive and negative results
1 paper in the same direction as this paper · 2 reporting no difference from an alternative
- positive
- positive
- negative
dicamba · Echinochloa crus-galli · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
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glyphosate · Echinochloa crus-galli · Glycine max (soybean)Positive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
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See all 10 papers →herbicide · Echinochloa crus-galli · Glycine max (soybean)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.