Abstract
Field studies were conducted in 2006 and 2007 to evaluate strategies for management of four glyphosate-tolerant common lambsquarters populations in glyphosate-resistant soybeans. Treatments consisted of several different preplant herbicide combinations followed by one or two postemergence applications of 0.84 to 3.36 kg ae/ha of glyphosate. Preplant application of a combination of glyphosate, 2,4-D ester and residual herbicides resulted in the most effective control of all populations, and allowed use of a single postemergence glyphosate application at the lowest rate. Late-season control of common lambsquarters ranged from 66 to 95% where no preplant herbicides were applied, 72 to 97% for preplant application of glyphosate and 2,4-D, and 96 to 100% for the combination of glyphosate, 2,4-D, flumioxazin, and cloransulam-methyl. Individual plants survived and produced seed following single postemergence glyphosate applications of 3.36 kg ae/ha, and multiple glyphosate applications totaling 2.5 kg ae/ha. Multiple postemergence treatments were more effective than single postemergence treatments for reduction of common lambsquarters population density and seed production. The progeny of plants that survived high rates of glyphosate in the field were screened for their response to glyphosate in the greenhouse. Progeny from one of three populations exhibited increased glyphosate tolerance from 1 yr of selection pressure.
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Claims 10
Claim · model-written summary
The preplant glyphosate, 2,4-D ester and residual herbicide combination gave the most effective control of all lambsquarters populations.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- combination of glyphosate, 2,4-D ester and residual herbicidese0
- Interactor
- Common Lambsquarters
Chenopodium albumt1weed - Outcome
- control of all populationse0
- Direction
- most effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preplant application of a combination of glyphosate, 2,4-D ester and residual herbicides resulted in the most effective control of all populations”
t0“Soybean”
t1“Common Lambsquarters (Chenopodium album)”
Claim · model-written summary
That preplant combination allowed a single postemergence glyphosate application at the lowest rate.
- Taxon
- SoybeanGlycine maxt0
- Interactor
- Common LambsquartersChenopodium albumt1weed
- Outcome
- single postemergence glyphosate application at the lowest ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“allowed use of a single postemergence glyphosate application at the lowest rate”
t0“Soybean”
t1“Common Lambsquarters”
Claim · model-written summary
Without preplant herbicides, late-season lambsquarters control ranged from 66 to 95%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- no preplant herbicidese0
- Interactor
- common lambsquartersChenopodium albume0weed
- Outcome
- control of common lambsquarterse0
- Value
- 66 to 95%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late-season control of common lambsquarters ranged from 66 to 95% where no preplant herbicides were applied”
t0“Soybean”
Claim · model-written summary
Preplant glyphosate and 2,4-D produced 72 to 97% late-season lambsquarters control.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- preplant application of glyphosate and 2,4-De0
- Interactor
- common lambsquartersChenopodium albume1weed
- Outcome
- control of common lambsquarterse1
- Value
- 72 to 97%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“72 to 97% for preplant application of glyphosate and 2,4-D”
e1“Late-season control of common lambsquarters”
t0“Soybean”
Claim · model-written summary
Preplant glyphosate, 2,4-D, flumioxazin and cloransulam-methyl produced 96 to 100% late-season lambsquarters control.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- combination of glyphosate, 2,4-D, flumioxazin, and cloransulam-methyle0
- Interactor
- common lambsquartersChenopodium albume1weed
- Outcome
- control of common lambsquarterse1
- Value
- 96 to 100%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“96 to 100% for the combination of glyphosate, 2,4-D, flumioxazin, and cloransulam-methyl”
e1“Late-season control of common lambsquarters”
t0“Soybean”
Claim · model-written summary
Some lambsquarters plants survived and produced seed after one 3.36 kg ae/ha postemergence glyphosate application.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- single postemergence glyphosate applications of 3.36 kg ae/hae0
- Interactor
- Common LambsquartersChenopodium albumt1weed
- Outcome
- Individual plants survived and produced seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Individual plants survived and produced seed following single postemergence glyphosate applications of 3.36 kg ae/ha”
t0“Soybean”
t1“Common Lambsquarters”
Claim · model-written summary
Some lambsquarters plants survived and produced seed after multiple glyphosate applications totaling 2.5 kg ae/ha.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- multiple glyphosate applications totaling 2.5 kg ae/hae0
- Interactor
- Common LambsquartersChenopodium albumt1weed
- Outcome
- Individual plants survived and produced seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Individual plants survived and produced seed following single postemergence glyphosate applications of 3.36 kg ae/ha, and multiple glyphosate applications totaling 2.5 kg ae/ha”
t0“Soybean”
t1“Common Lambsquarters”
Claim · model-written summary
Multiple postemergence treatments reduced lambsquarters density more effectively than single treatments.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Multiple postemergence treatmentse0
- Interactor
- common lambsquartersChenopodium albume0weed
- Outcome
- common lambsquarters population densitye0
- Direction
- reductione0
- Comparator
- single postemergence treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiple postemergence treatments were more effective than single postemergence treatments for reduction of common lambsquarters population density and seed production”
t0“Soybean”
Claim · model-written summary
Multiple postemergence treatments reduced lambsquarters seed production more effectively than single treatments.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Multiple postemergence treatmentse0
- Interactor
- common lambsquartersChenopodium albume0weed
- Outcome
- seed productione0
- Direction
- reductione0
- Comparator
- single postemergence treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiple postemergence treatments were more effective than single postemergence treatments for reduction of common lambsquarters population density and seed production”
t0“Soybean”
Claim · model-written summary
Progeny from one of three surviving lambsquarters populations had increased glyphosate tolerance after one year of selection.
- Taxon
- SoybeanGlycine maxt0
- Interactor
- Common LambsquartersChenopodium albumt1weed
- Outcome
- glyphosate tolerancee0
- Direction
- increasede0
- Qualifier
- 1 yr of selection pressuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Progeny from one of three populations exhibited increased glyphosate tolerance from 1 yr of selection pressure”
t0“Soybean”
t1“Common Lambsquarters”
The same questions in other papers
glyphosate · Chenopodium album · Glycine max (soybean)Positive and negative results
8 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
6 papers more in this group
See all 10 papers →2,4-D · Chenopodium album · Glycine max (soybean)Results agree
2 papers in the same direction as this paper
- positive
- positive
herbicide · Chenopodium album · Glycine max (soybean)Positive and negative results
7 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- negative
- no effect
9 papers more in this group
See all 13 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.