Abstract
Field trials were conducted in Ontario in 2013 and 2014 in soybean to determine the efficacy of POST herbicides on common ragweed resistant to group 2 and group 9 herbicides. Glyphosate dose-response experiments were conducted in the field on two resistant common ragweed populations and one susceptible population. None of the POST herbicides evaluated provided 80% control of glyphosate-resistant (GR) common ragweed. The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed. Chlorimuron, cloransulam, imazethapyr, and thifensulfuron provided control similar to glyphosate alone. An application of glyphosate/fomesafen reduced biomass by as much as 95%. Glyphosate plus acifluorfen reduced GR common ragweed biomass by as much as 92%. The remaining POST herbicide tank mixes evaluated reduced GR common ragweed biomass by less than 80%. Glyphosate plus bentazon, glyphosate plus chlorimuron, and glyphosate plus thifensulfuron resulted in soybean yields similar to the weedy control, with yield reductions of 70, 62, and 73%, respectively. An application of glyphosate plus fomesafen or glyphosate/fomesafen had the lowest soybean yield reductions of 29 and 34%, respectively. The resistant biotype required a 2- to 28-fold increase in glyphosate dose compared to the susceptible population to achieve 50% control.
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Claims 12
Claim · model-written summary
No evaluated POST herbicide achieved 80% control of GR common ragweed.
- Taxon
- soybean
Glycine maxt0 - Interactor
- common ragweed
Ambrosia artemisiifoliae0weed - Outcome
- control of glyphosate-resistant (GR) common ragweede0
- Value
- 80%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“None of the POST herbicides evaluated provided 80% control of glyphosate-resistant (GR) common ragweed”
t0“Soybean”
Claim · model-written summary
Glyphosate plus fomesafen provided 68 to 98% control of GR common ragweed.
- Taxon
- soybeanGlycine maxt0
- Treatment
- glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafene1
- Interactor
- common ragweedAmbrosia artemisiifoliae0weed
- Outcome
- control of GR common ragweede0
- Value
- 68 to 98%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which provided 68 to 98% control of GR common ragweed”
t0“Glyphosate-Resistant Common Ragweed (Ambrosia artemisiifolia) Control with Postemergence Herbicides and Glyphosate Dose Response in Soybean”
e1“The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed”
Claim · model-written summary
Chlorimuron, cloransulam, imazethapyr, and thifensulfuron controlled ragweed similarly to glyphosate alone.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Chlorimuron, cloransulam, imazethapyr, and thifensulfurone0
- Interactor
- Common RagweedAmbrosia artemisiifoliat0weed
- Outcome
- controle0
- Direction
- similare0
- Comparator
- glyphosate alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorimuron, cloransulam, imazethapyr, and thifensulfuron provided control similar to glyphosate alone”
t0“Common Ragweed (Ambrosia artemisiifolia) Control with Postemergence Herbicides and Glyphosate Dose Response in Soybean”
e1“The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed”
Claim · model-written summary
Glyphosate/fomesafen reduced ragweed biomass by as much as 95%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- glyphosate/fomesafene0
- Interactor
- Common RagweedAmbrosia artemisiifoliat0weed
- Outcome
- biomasse0
- Direction
- reducede0
- Value
- 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An application of glyphosate/fomesafen reduced biomass by as much as 95%”
t0“Common Ragweed (Ambrosia artemisiifolia) Control with Postemergence Herbicides and Glyphosate Dose Response in Soybean”
e1“The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed”
Claim · model-written summary
Glyphosate plus acifluorfen reduced ragweed biomass by as much as 92%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Glyphosate plus acifluorfene0
- Interactor
- common ragweedAmbrosia artemisiifoliae0weed
- Outcome
- GR common ragweed biomasse0
- Direction
- reducede0
- Value
- 92%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate plus acifluorfen reduced GR common ragweed biomass by as much as 92%”
t0“Soybean”
Claim · model-written summary
Remaining POST herbicide tank mixes reduced ragweed biomass by less than 80%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- POST herbicide tank mixese0
- Interactor
- common ragweedAmbrosia artemisiifoliae0weed
- Outcome
- GR common ragweed biomasse0
- Direction
- reducede0
- Value
- less than 80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The remaining POST herbicide tank mixes evaluated reduced GR common ragweed biomass by less than 80%”
t0“Soybean”
Claim · model-written summary
Glyphosate plus bentazon yielded similarly to the weedy control, with a 70% reduction.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Glyphosate plus bentazone0
- Interactor
- Common RagweedAmbrosia artemisiifoliat0weed
- Outcome
- soybean yieldse0
- Direction
- yield reductionse0
- Value
- 70e0
- Comparator
- weedy controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate plus bentazon, glyphosate plus chlorimuron, and glyphosate plus thifensulfuron resulted in soybean yields similar to the weedy control, with yield reductions of 70, 62, and 73%, respectively”
t0“Common Ragweed”
e1“The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed”
Claim · model-written summary
Glyphosate plus chlorimuron yielded similarly to the weedy control, with a 62% reduction.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate plus chlorimurone0
- Interactor
- Common RagweedAmbrosia artemisiifoliat0weed
- Outcome
- soybean yieldse0
- Direction
- yield reductionse0
- Value
- 62e0
- Comparator
- weedy controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate plus bentazon, glyphosate plus chlorimuron, and glyphosate plus thifensulfuron resulted in soybean yields similar to the weedy control, with yield reductions of 70, 62, and 73%, respectively”
t0“Common Ragweed”
e1“The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed”
Claim · model-written summary
Glyphosate plus thifensulfuron yielded similarly to the weedy control, with a 73% reduction.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate plus thifensulfurone0
- Interactor
- Common RagweedAmbrosia artemisiifoliat0weed
- Outcome
- soybean yieldse0
- Direction
- yield reductionse0
- Value
- 73%e0
- Comparator
- weedy controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate plus bentazon, glyphosate plus chlorimuron, and glyphosate plus thifensulfuron resulted in soybean yields similar to the weedy control, with yield reductions of 70, 62, and 73%, respectively”
t0“Common Ragweed”
e1“The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed”
Claim · model-written summary
Glyphosate plus fomesafen had a 29% soybean yield reduction.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate plus fomesafene0
- Interactor
- Common RagweedAmbrosia artemisiifoliat0weed
- Outcome
- soybean yield reductionse0
- Direction
- reductionse0
- Value
- 29e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An application of glyphosate plus fomesafen or glyphosate/fomesafen had the lowest soybean yield reductions of 29 and 34%, respectively”
t0“Common Ragweed”
e1“The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed”
Claim · model-written summary
Glyphosate/fomesafen had a 34% soybean yield reduction.
- Taxon
- soybeanGlycine maxe0
- Treatment
- glyphosate/fomesafene0
- Interactor
- Common RagweedAmbrosia artemisiifoliat0weed
- Outcome
- soybean yield reductionse0
- Direction
- reductionse0
- Value
- 34%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An application of glyphosate plus fomesafen or glyphosate/fomesafen had the lowest soybean yield reductions of 29 and 34%, respectively”
t0“Common Ragweed”
e1“The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed”
Claim · model-written summary
The resistant ragweed biotype required 2- to 28-fold more glyphosate than the susceptible population for 50% control.
- Taxon
- soybeanGlycine maxt0
- Material
- resistant biotypee0
- Interactor
- Common RagweedAmbrosia artemisiifoliat0weed
- Outcome
- glyphosate dosee0
- Direction
- increasee0
- Value
- 2- to 28-folde0
- Comparator
- susceptible populatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The resistant biotype required a 2- to 28-fold increase in glyphosate dose compared to the susceptible population to achieve 50% control”
t0“Common Ragweed (Ambrosia artemisiifolia) Control with Postemergence Herbicides and Glyphosate Dose Response in Soybean”
e1“The most effective POST herbicide mixture was glyphosate (Monsanto Canada Inc., 67 Scurfield Blvd., Winnipeg, Manitoba, Canada) plus fomesafen(Syngenta Canada Inc., 140 Research Lane, Research Park Guelph, Ontario, Canada), which provided 68 to 98% control of GR common ragweed”
The same questions in other papers
bentazone · Ambrosia artemisiifolia · Glycine max (soybean)Positive and negative results
2 in the opposite direction
- positive
- positive
thifensulfuron · Ambrosia artemisiifolia · Glycine max (soybean)Positive and negative results
2 in the opposite direction
- positive
- positive
chlorimuron · Ambrosia artemisiifolia · Glycine max (soybean)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
glyphosate · Ambrosia artemisiifolia · Glycine max (soybean)Positive and negative results
7 papers in the same direction as this paper · 2 in the opposite direction
- negative
- positive
- positive
6 papers more in this group
See all 10 papers →fomesafen · Ambrosia artemisiifolia · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- positive
acifluorfen · Ambrosia artemisiifolia · Glycine max (soybean)Results agree
3 papers in the same direction as this paper
- positive
- 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.