Abstract
Traditional two-pass weed management strategies need to be compared with new strategies in glyphosate/dicamba-resistant soybean. Weed control, soybean yield, partial profitability and environmental impact (EI) were evaluated in glyphosate/dicamba-resistant soybean using dicamba applied alone or in a tank-mix with dimethenamid-P applied preemergence (PRE). Trials were conducted at three locations during 2014 and 2015. Several PRE herbicides provided excellent control of broadleaf and grass weeds. Dicamba provided > 91% control of broadleaf weeds, and the addition of dimethenamid-P improved grass control. All weed species at the trial locations were controlled > 94% following a postemergence (POST) application of glyphosate. Weed interference reduced soybean seed yield 33% where no herbicide was applied. A single POST application of glyphosate had the lowest EI. Several treatments improved early-season weed control and reduced early-season weed density and biomass compared to glyphosate and had similar EI values. In this study, there was no benefit to yield or partial profit by including a PRE herbicide for weed management; however, the inclusion of multiple modes-of-action in a herbicide program may reduce the selection for herbicide-resistant weeds.
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Claims 11
Claim · model-written summary
Several preemergence herbicides gave excellent broadleaf and grass weed control.
- Taxon
- soybean
Glycine maxt0 - Treatment
- Several PRE herbicidese0
- Outcome
- control of broadleaf and grass weedse0
- Direction
- excellente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several PRE herbicides provided excellent control of broadleaf and grass weeds.”
t0“Soybean”
Claim · model-written summary
Dicamba controlled more than 91% of broadleaf weeds.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Dicambae0
- Interactor
- broadleaf weedse0weed
- Outcome
- control of broadleaf weedse0
- Value
- > 91%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dicamba provided > 91% control of broadleaf weeds”
t0“Soybean”
Claim · model-written summary
Adding dimethenamid-P improved grass weed control.
- Taxon
- soybeanGlycine maxt0
- Treatment
- dimethenamid-Pe0
- Interactor
- grasse0weed
- Outcome
- grass controle0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of dimethenamid-P improved grass control”
t0“Soybean”
Claim · model-written summary
Postemergence glyphosate controlled all trial weed species by more than 94%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- postemergence (POST) application of glyphosatee0
- Interactor
- weed speciese0weed
- Outcome
- weed speciese0
- Direction
- controllede0
- Value
- > 94%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All weed species at the trial locations were controlled > 94% following a postemergence (POST) application of glyphosate.”
t0“Soybean”
Claim · model-written summary
Weed interference reduced soybean seed yield by 33% without herbicide.
- Taxon
- soybeanGlycine maxe0
- Interactor
- Weede0weed
- Outcome
- soybean seed yielde0
- Direction
- reducede0
- Value
- 33%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed interference reduced soybean seed yield 33% where no herbicide was applied.”
Claim · model-written summary
A single postemergence glyphosate application had the lowest environmental impact.
- Taxon
- soybeanGlycine maxt0
- Treatment
- A single POST application of glyphosatee0
- Outcome
- EIe0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single POST application of glyphosate had the lowest EI.”
t0“Soybean”
Claim · model-written summary
Several treatments improved early season weed control versus glyphosate.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Several treatmentse0
- Outcome
- early-season weed controle0
- Direction
- improvede0
- Comparator
- glyphosatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several treatments improved early-season weed control and reduced early-season weed density and biomass compared to glyphosate and had similar EI values.”
t0“Soybean”
Claim · model-written summary
Several treatments reduced early season weed density and biomass versus glyphosate.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Several treatmentse0
- Outcome
- early-season weed density and biomasse0
- Direction
- reducede0
- Comparator
- glyphosatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several treatments improved early-season weed control and reduced early-season weed density and biomass compared to glyphosate and had similar EI values.”
t0“Soybean”
Claim · model-written summary
Several treatments had environmental impacts similar to glyphosate.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Several treatmentse0
- Outcome
- EI valuese0
- Direction
- similare0
- Comparator
- glyphosatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several treatments improved early-season weed control and reduced early-season weed density and biomass compared to glyphosate and had similar EI values.”
t0“Soybean”
Claim · model-written summary
Including a preemergence herbicide did not benefit soybean yield or partial profit.
- Taxon
- soybeanGlycine maxt0
- Treatment
- including a PRE herbicidee0
- Outcome
- yield or partial profite0
- Direction
- no benefite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no benefit to yield or partial profit by including a PRE herbicide for weed management”
t0“Soybean”
Claim · model-written summary
Multiple herbicide modes of action may reduce selection for resistant weeds.
- Taxon
- soybeanGlycine maxt0
- Outcome
- inclusion of multiple modes-of-action in a herbicide programe0
- Qualifier
- may reduce the selection for herbicide-resistant weedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inclusion of multiple modes-of-action in a herbicide program may reduce the selection for herbicide-resistant weeds.”
t0“Soybean”
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See all 460 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.