Abstract
Confirmation of glyphosate-resistant (GR) weeds in southwestern Ontario has led to a change in weed management practices, particularly in soybean. Registered soil-applied herbicides have been identified that have activity on GR common ragweed; however, due to the long emergence period of common ragweed, additional postemergence options are required. The recent development of glyphosate- and dicamba-resistant soybean (Roundup Ready Xtend soybean) allows for the preplant and postemergence application of dicamba. Three field studies were conducted in Ontario, Canada, in a field with confirmed GR common ragweed. Glyphosate-resistant common ragweed interference resulted in 75% yield loss in soybean compared with the weed-free check. At 4 wk after application, dicamba tank-mixed with glyphosate applied preplant only, postemergence only, or preplant followed by postemergence controlled GR common ragweed up to 94%, 87%, and 99%, respectively. The availability of dicamba for use in glyphosate- and dicamba-resistant soybean will provide an additional mode of action for weed management in soybean.
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Claims 5
Claim · model-written summary
Glyphosate-resistant ragweed interference caused 75% soybean yield loss.
- Taxon
- soybean
Glycine maxe0 - Interactor
- common ragweed
Ambrosia artemisiifoliae0weed - Outcome
- yield losse0
- Direction
- losse0
- Value
- 75%e0
- Comparator
- weed-free checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate-resistant common ragweed interference resulted in 75% yield loss in soybean compared with the weed-free check.”
Claim · model-written summary
Preplant dicamba plus glyphosate controlled ragweed up to 94%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- dicamba tank-mixed with glyphosate applied preplant onlye0
- Interactor
- common ragweedAmbrosia artemisiifoliae0weed
- Outcome
- controlled GR common ragweede0
- Direction
- controllede0
- Value
- 94%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dicamba tank-mixed with glyphosate applied preplant only, postemergence only, or preplant followed by postemergence controlled GR common ragweed up to 94%, 87%, and 99%, respectively.”
t0“soybean”
Claim · model-written summary
Postemergence dicamba plus glyphosate controlled ragweed up to 87%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- postemergence onlye0
- Interactor
- common ragweedAmbrosia artemisiifoliae0weed
- Outcome
- controlled GR common ragweede0
- Direction
- controllede0
- Value
- 87%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dicamba tank-mixed with glyphosate applied preplant only, postemergence only, or preplant followed by postemergence controlled GR common ragweed up to 94%, 87%, and 99%, respectively.”
t0“soybean”
Claim · model-written summary
Sequential preplant then postemergence dicamba plus glyphosate controlled ragweed up to 99%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- preplant followed by postemergencee0
- Interactor
- common ragweedAmbrosia artemisiifoliae0weed
- Outcome
- controlled GR common ragweede0
- Direction
- controllede0
- Value
- 99%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dicamba tank-mixed with glyphosate applied preplant only, postemergence only, or preplant followed by postemergence controlled GR common ragweed up to 94%, 87%, and 99%, respectively.”
t0“soybean”
Claim · model-written summary
Dicamba availability provides an additional weed-management mode of action in soybean.
- Taxon
- soybeanGlycine maxe0
- Outcome
- additional mode of action for weed management in soybeane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The availability of dicamba for use in glyphosate- and dicamba-resistant soybean will provide an additional mode of action for weed management in soybean.”
The same questions in other papers
glyphosate · Ambrosia artemisiifolia · Glycine max (soybean)Positive and negative results
7 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
6 papers more in this group
See all 10 papers →dicamba · Ambrosia artemisiifolia · Glycine max (soybean)Results agree
2 papers in the same direction as this paper
- positive
- positive
herbicide · Ambrosia artemisiifolia · Glycine max (soybean)Results agree
9 papers in the same direction as this paper
- positive
- positive
- positive
6 papers more in this group
See all 10 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.