Abstract
Since 2006, glyphosate-resistant Palmer amaranth has been considered the most problematic weed in agronomic crops across the Midsouth. As a result of glyphosate resistance, producers began to again utilize a diverse herbicide program for management of this weed, which consists of several soil-residual herbicides most notably diuron, fluometuron, fomesafen, and metolachlor. Fluridone inhibits phytoene desaturase in plants, and is unique in that its mechanism of action (MOA) is not currently registered for use in cotton. Studies were conducted to determine the length of residual that fluridone provides in controlling Palmer amaranth in Arkansas glyphosate- and glufosinate-resistant cotton programs and along field margins in comparison to other soil-residual herbicides. Furthermore, studies were conducted to assess the persistence of fluridone in Arkansas soils and the risk for injury to crops subsequently planted following fluridone use in cotton. Regardless of the cotton program, fluridone failed to provide season-long control of Palmer amaranth; hence, reducing the number of postemergence applications will not be recommended when applying fluridone at cotton planting. Additionally, fluridone failed to provide season-long control of Palmer amaranth along ditchbanks over that of other labeled soil-residual herbicides; however, when applied under favorable conditions fluridone applied preplant incorporated provided extended control of Palmer amaranth with or without a sequential application. Injury to wheat as a rotational crop from an application of fluridone to cotton was greater than that of other crops commonly rotated with cotton; albeit, injury was not severe enough to result in wheat yield reductions. Although fluridone did not provide season-long control of Palmer amaranth, introducing a herbicide with a unique MOA into current cotton would be beneficial for reducing the risk of resistance to herbicides that are currently used in cotton.
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Claims 7
Claim · model-written summary
Fluridone failed to control Palmer amaranth for the full season in cotton programs.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- fluridonee0
- Interactor
- Palmer amaranthe0weed
- Outcome
- season-long control of Palmer amaranthe0
- Direction
- failed to providee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regardless of the cotton program, fluridone failed to provide season-long control of Palmer amaranth”
Claim · model-written summary
The authors advised against reducing postemergence applications when fluridone is applied at cotton planting.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- fluridone at cotton plantinge0
- Outcome
- reducing the number of postemergence applications will not be recommendede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing the number of postemergence applications will not be recommended when applying fluridone at cotton planting”
Claim · model-written summary
Fluridone failed to provide season long Palmer amaranth control along ditchbanks relative to other soil residual herbicides.
- Taxon
- Cotton (Gossypium hirsutum)Gossypium hirsutumt0
- Treatment
- fluridonee0
- Interactor
- Palmer amaranthe0weed
- Outcome
- season-long control of Palmer amaranthe0
- Direction
- failed to providee0
- Comparator
- other labeled soil-residual herbicidese0
- Setting
- ditchbankse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fluridone failed to provide season-long control of Palmer amaranth along ditchbanks over that of other labeled soil-residual herbicides”
t0“Cotton (Gossypium hirsutum)”
Claim · model-written summary
Preplant incorporated fluridone under favorable conditions extended Palmer amaranth control, with or without sequential application.
- Taxon
- Cotton (Gossypium hirsutum)Gossypium hirsutumt0
- Treatment
- fluridone applied preplant incorporatede0
- Interactor
- Palmer amaranthe0weed
- Outcome
- control of Palmer amaranthe0
- Direction
- extendede0
- Qualifier
- with or without a sequential applicatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when applied under favorable conditions fluridone applied preplant incorporated provided extended control of Palmer amaranth with or without a sequential application”
t0“Cotton (Gossypium hirsutum)”
Claim · model-written summary
Wheat injury from fluridone applied to cotton was greater than injury to other common rotation crops.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- application of fluridone to cottone0
- Outcome
- Injury to wheate0
- Direction
- greatere0
- Comparator
- other crops commonly rotated with cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Injury to wheat as a rotational crop from an application of fluridone to cotton was greater than that of other crops commonly rotated with cotton”
Claim · model-written summary
Fluridone injury did not reduce rotational wheat yield.
- Taxon
- wheatTriticum aestivume0
- Treatment
- application of fluridone to cottone1
- Outcome
- wheat yielde0
- Direction
- not severe enough to result in wheat yield reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“injury was not severe enough to result in wheat yield reductions”
e1“application of fluridone to cotton”
Claim · model-written summary
The authors considered a unique mode of action herbicide beneficial for reducing resistance risk in cotton.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- reducing the risk of resistance to herbicides that are currently used in cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“introducing a herbicide with a unique MOA into current cotton would be beneficial for reducing the risk of resistance to herbicides that are currently used in cotton”
The same questions in other papers
Gossypium hirsutum · yield · Triticum aestivum (wheat)Positive and negative results
4 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
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See all 15 papers →Fluridone · crop injury · Triticum aestivum (wheat)Results agree
2 papers in the same direction as this paper
- negative
- negative
Fluridone · yield · Triticum aestivum (wheat)Results agree
3 papers in the same direction as this paper
- negative
- no effect
- no effect
Fluridone · control · Gossypium hirsutum (cotton)Results agree
8 papers in the same direction as this paper
- positive
- positive
- positive
5 papers more in this group
See all 9 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.