Abstract
Waterhemp is a small-seeded, dioecious, broadleaf weed that emerges throughout the growing season. If left uncontrolled, waterhemp interference can reduce soybean yield up to 73%. Glyphosate-resistant (GR) waterhemp was first discovered in one county in Ontario in 2014; as of 2017, it has been found in two other counties. Glyphosate/dicamba-resistant soybean can be sprayed with glyphosate and/or dicamba preplant (PP), preemergence (PRE) and/or postemergence (POST). The objective of this study was to determine the control of GR waterhemp in glyphosate/dicamba-resistant soybean with PRE residual herbicides, glyphosate/dicamba applied POST or a two-pass program of a PRE residual herbicide followed by glyphosate/dicamba applied POST. At 8 weeks after application (WAA), pyroxasulfone (150 g ai ha-1), S-metolachlor/metribuzin (1943 g ai ha-1), pyroxasulfone/sulfentrazone (300 g ai ha-1) and flumioxazin/pyroxasulfone (240 g ai ha-1), applied PRE, resulted in 71%, 85%, 82% and 90% GR waterhemp control, respectively. The same PRE herbicides, followed by glyphosate/dicamba (1800 g ae ha-1) POST, improved control to greater than 96%. This study concludes that a two-pass program of an effective soil applied residual herbicide followed by glyphosate/dicamba POST controlled GR waterhemp in glyphosate/dicamba-resistant soybean.
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Claims 6
Claim · model-written summary
Preemergence pyroxasulfone controlled GR waterhemp by 71% at eight weeks.
- Taxon
- soybean
Glycine maxe1 - Treatment
- pyroxasulfone (150 g ai ha-1)e0
- Interactor
- waterhempe0weed
- Outcome
- GR waterhemp controle0
- Direction
- controle0
- Value
- 71%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 8 weeks after application (WAA), pyroxasulfone (150 g ai ha-1), S-metolachlor/metribuzin (1943 g ai ha-1), pyroxasulfone/sulfentrazone (300 g ai ha-1) and flumioxazin/pyroxasulfone (240 g ai ha-1), applied PRE, resulted in 71%, 85%, 82% and 90% GR waterhemp control, respectively.”
e1“The objective of this study was to determine the control of GR waterhemp in glyphosate/dicamba-resistant soybean with PRE residual herbicides, glyphosate/dicamba applied POST or a two-pass program of a PRE residual herbicide followed by glyphosate/dicamba applied POST.”
Claim · model-written summary
Preemergence S-metolachlor/metribuzin controlled GR waterhemp by 85%.
- Taxon
- soybeanGlycine maxe1
- Treatment
- S-metolachlor/metribuzin (1943 g ai ha-1)e0
- Interactor
- waterhempe0weed
- Outcome
- GR waterhemp controle0
- Direction
- controle0
- Value
- 85%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 8 weeks after application (WAA), pyroxasulfone (150 g ai ha-1), S-metolachlor/metribuzin (1943 g ai ha-1), pyroxasulfone/sulfentrazone (300 g ai ha-1) and flumioxazin/pyroxasulfone (240 g ai ha-1), applied PRE, resulted in 71%, 85%, 82% and 90% GR waterhemp control, respectively.”
e1“The objective of this study was to determine the control of GR waterhemp in glyphosate/dicamba-resistant soybean with PRE residual herbicides, glyphosate/dicamba applied POST or a two-pass program of a PRE residual herbicide followed by glyphosate/dicamba applied POST.”
Claim · model-written summary
Preemergence pyroxasulfone/sulfentrazone controlled GR waterhemp by 82%.
- Taxon
- soybeanGlycine maxe1
- Treatment
- pyroxasulfone/sulfentrazone (300 g ai ha-1)e0
- Interactor
- waterhempe0weed
- Outcome
- GR waterhemp controle0
- Direction
- controle0
- Value
- 82%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 8 weeks after application (WAA), pyroxasulfone (150 g ai ha-1), S-metolachlor/metribuzin (1943 g ai ha-1), pyroxasulfone/sulfentrazone (300 g ai ha-1) and flumioxazin/pyroxasulfone (240 g ai ha-1), applied PRE, resulted in 71%, 85%, 82% and 90% GR waterhemp control, respectively.”
e1“The objective of this study was to determine the control of GR waterhemp in glyphosate/dicamba-resistant soybean with PRE residual herbicides, glyphosate/dicamba applied POST or a two-pass program of a PRE residual herbicide followed by glyphosate/dicamba applied POST.”
Claim · model-written summary
Preemergence flumioxazin/pyroxasulfone controlled GR waterhemp by 90%.
- Taxon
- soybeanGlycine maxe1
- Treatment
- flumioxazin/pyroxasulfone (240 g ai ha-1)e0
- Interactor
- waterhempe0weed
- Outcome
- GR waterhemp controle0
- Direction
- controle0
- Value
- 90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 8 weeks after application (WAA), pyroxasulfone (150 g ai ha-1), S-metolachlor/metribuzin (1943 g ai ha-1), pyroxasulfone/sulfentrazone (300 g ai ha-1) and flumioxazin/pyroxasulfone (240 g ai ha-1), applied PRE, resulted in 71%, 85%, 82% and 90% GR waterhemp control, respectively.”
e1“The objective of this study was to determine the control of GR waterhemp in glyphosate/dicamba-resistant soybean with PRE residual herbicides, glyphosate/dicamba applied POST or a two-pass program of a PRE residual herbicide followed by glyphosate/dicamba applied POST.”
Claim · model-written summary
Following preemergence herbicides with glyphosate/dicamba improved GR waterhemp control above 96%.
- Taxon
- soybeanGlycine maxe1
- Treatment
- glyphosate/dicamba (1800 g ae ha-1) POSTe0
- Interactor
- waterhempe1weed
- Outcome
- controle0
- Direction
- improvede0
- Value
- greater than 96%e0
- Comparator
- same PRE herbicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same PRE herbicides, followed by glyphosate/dicamba (1800 g ae ha-1) POST, improved control to greater than 96%.”
e1“The objective of this study was to determine the control of GR waterhemp in glyphosate/dicamba-resistant soybean with PRE residual herbicides, glyphosate/dicamba applied POST or a two-pass program of a PRE residual herbicide followed by glyphosate/dicamba applied POST.”
Claim · model-written summary
The authors concluded a two-pass residual herbicide followed by glyphosate/dicamba controlled GR waterhemp.
- Taxon
- soybeanGlycine maxe0
- Interactor
- waterhempe0weed
- Outcome
- two-pass program of an effective soil applied residual herbicide followed by glyphosate/dicamba POSTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study concludes that a two-pass program of an effective soil applied residual herbicide followed by glyphosate/dicamba POST controlled GR waterhemp in glyphosate/dicamba-resistant soybean.”
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See all 123 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.