Abstract
Abstract Glyphosate-resistant (GR) horseweed was first confirmed in Ontario in 2010. GR horseweed interference can reduce soybean yield by up to 97%. Bromoxynil is a photosystem II–inhibiting herbicide that is primarily used for annual broadleaf weed control in monocot crops. The objective of this study was to determine the biologically effective dose (BED) of bromoxynil applied alone and when mixed with metribuzin applied preplant for control of GR horseweed in soybean in Ontario. Five field experiments were conducted over a 2-yr period (2019–2020) to determine the predicted dose of bromoxynil with or without metribuzin that would control GR horseweed 50%, 80%, and 95%. No soybean injury was observed. The predicted doses of bromoxynil to achieve 50% and 80% control of GR horseweed were 98 and 277 g ai ha −1 , respectively, at 8 wk after application (WAA). When mixed with metribuzin (400 g ai ha −1 ), the predicted doses of bromoxynil for 50%, 80%, and 95% control of GR horseweed were 10, 25, and 54 g ai ha −1 , respectively. Bromoxynil (280 g ai ha −1 ) plus metribuzin (400 g ai ha −1 ) controlled GR horseweed 97%, a finding that was similar to the industry standards of saflufenacil + metribuzin (99% control) and glyphosate/dicamba + saflufenacil (100% control) at 8 WAA. This study concludes that bromoxynil + metribuzin applied before planting provides excellent control of GR horseweed in soybean.
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Claims 5
Claim · model-written summary
Bromoxynil alone needed 98 and 277 g ai ha −1 to achieve 50% and 80% control of GR horseweed.
- Taxon
- soybean
Glycine maxt0 - Treatment
- bromoxynile1
- Interactor
- GR horseweede1weed
- Outcome
- control of GR horseweede1
- Value
- 98 and 277 g ai ha −1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“control of glyphosate-resistant horseweed in soybean”
e1“The predicted doses of bromoxynil to achieve 50% and 80% control of GR horseweed were 98 and 277 g ai ha −1”
Claim · model-written summary
Bromoxynil mixed with metribuzin needed 10, 25 and 54 g ai ha −1 for 50%, 80% and 95% control of GR horseweed.
- Taxon
- soybeanGlycine maxt0
- Treatment
- mixed with metribuzine2
- Interactor
- GR horseweede2weed
- Outcome
- control of GR horseweede2
- Value
- 10, 25, and 54 g ai ha −1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“control of glyphosate-resistant horseweed in soybean”
e2“When mixed with metribuzin (400 g ai ha −1 ), the predicted doses of bromoxynil for 50%, 80%, and 95% control of GR horseweed were 10, 25, and 54 g ai ha −1”
Claim · model-written summary
Bromoxynil plus metribuzin controlled GR horseweed 97%.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Bromoxynil (280 g ai ha −1 ) plus metribuzin (400 g ai ha −1 )e3
- Interactor
- GR horseweede3weed
- Outcome
- controlled GR horseweede3
- Direction
- controllede3
- Value
- 97%e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“control of glyphosate-resistant horseweed in soybean”
e3“Bromoxynil (280 g ai ha −1 ) plus metribuzin (400 g ai ha −1 ) controlled GR horseweed 97%”
Claim · model-written summary
Bromoxynil plus metribuzin gave control similar to saflufenacil plus metribuzin (99% control).
- Taxon
- soybeanGlycine maxt0
- Treatment
- metribuzine4
- Outcome
- controle4
- Direction
- similare4
- Value
- 99%e4
- Comparator
- saflufenacil + metribuzine4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“control of glyphosate-resistant horseweed in soybean”
e4“a finding that was similar to the industry standards of saflufenacil + metribuzin (99% control)”
Claim · model-written summary
Bromoxynil plus metribuzin applied before planting provides excellent control of GR horseweed in soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- applied before plantinge5
- Outcome
- control of GR horseweede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“control of glyphosate-resistant horseweed in soybean”
e5“bromoxynil + metribuzin applied before planting provides excellent control of GR horseweed in soybean”
The same questions in other papers
metribuzin · control · Glycine max (soybean)Positive and negative results
42 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- no effect
44 papers more in this group
See all 48 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.