Abstract
A population of common ragweed in Ontario was confirmed to be resistant to glyphosate in 2011. Group 2 [acetolactate synthase (ALS) inhibitors] resistant common ragweed was first confirmed in Ontario in 2000. Previously, glyphosate provided excellent control of common ragweed in glyphosate resistant soybean but with the confirmation of glyphosate resistant (GR) common ragweed, alternative herbicides need to be evaluated. Eight field trials with preplant herbicides were completed over two years (2013 and 2014) in fields with confirmed GR common ragweed. Tank-mixes of glyphosate and linuron or metribuzin provided 88% - 99% and 86% - 98% control 4 weeks after application (WAA) and 80% - 92% and 80% - 95% control 8 WAA, respectively. However, these herbicides also had among the highest environmental impact of the herbicides tested. Based on the results of these studies, GR common ragweed can be controlled with residual herbicides when applied preemergence in soybean. Currently, there are no post emergence herbicides that provide adequate control of GR common ragweed, therefore, preemergence herbicides with residual are essential for full season control.
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Claims 7
Claim · model-written summary
Glyphosate plus linuron controlled resistant ragweed by 88% - 99% at four weeks.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- glyphosate and linurone0
- Interactor
- Common Ragweed (Ambrosia artemisiifolia L.)
Ambrosia artemisiifoliat0weed - Outcome
- controle0
- Value
- 88% - 99%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tank-mixes of glyphosate and linuron or metribuzin provided 88% - 99% and 86% - 98% control 4 weeks after application (WAA)”
t0“Common Ragweed (Ambrosia artemisiifolia L.) in Soybean”
Claim · model-written summary
Glyphosate plus metribuzin controlled resistant ragweed by 86% - 98% at four weeks.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- glyphosate and linuron or metribuzine0
- Interactor
- Common Ragweed (Ambrosia artemisiifolia L.)Ambrosia artemisiifoliat0weed
- Outcome
- controle0
- Value
- 86% - 98%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tank-mixes of glyphosate and linuron or metribuzin provided 88% - 99% and 86% - 98% control 4 weeks after application (WAA)”
t0“Common Ragweed (Ambrosia artemisiifolia L.) in Soybean”
Claim · model-written summary
Glyphosate plus linuron gave 80% - 92% control at eight weeks.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- glyphosate and linurone1
- Interactor
- Common Ragweed (Ambrosia artemisiifolia L.)Ambrosia artemisiifoliat0weed
- Outcome
- controle0
- Value
- 80% - 92%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“80% - 92% and 80% - 95% control 8 WAA”
e1“glyphosate and linuron”
t0“Common Ragweed (Ambrosia artemisiifolia L.) in Soybean”
Claim · model-written summary
Glyphosate plus metribuzin gave 80% - 95% control at eight weeks.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- metribuzine1
- Interactor
- Common Ragweed (Ambrosia artemisiifolia L.)Ambrosia artemisiifoliat0weed
- Outcome
- controle0
- Value
- 80% - 95%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“80% - 92% and 80% - 95% control 8 WAA”
e1“metribuzin”
t0“Common Ragweed (Ambrosia artemisiifolia L.) in Soybean”
Claim · model-written summary
These herbicides had among the highest environmental impacts tested.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- environmental impacte0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these herbicides also had among the highest environmental impact of the herbicides tested”
t0“Soybean”
Claim · model-written summary
Residual preemergence herbicides can control resistant ragweed in soybean.
- Taxon
- soybeanGlycine maxe0
- Outcome
- controlled with residual herbicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GR common ragweed can be controlled with residual herbicides when applied preemergence in soybean”
t0“Common Ragweed (Ambrosia artemisiifolia L.)”
Claim · model-written summary
Residual preemergence herbicides are considered essential for full-season control.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- preemergence herbicides with residual are essential for full season controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“preemergence herbicides with residual are essential for full season control”
t0“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 →metribuzin · Ambrosia artemisiifolia · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- positive
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.