Abstract
Glyphosate-resistant Palmer amaranth (Amaranthus palmeri S Wats.) has increased the need for effective preemergence (PRE) herbicides in cotton (Gossypium hirsutum L.). Fluridone, a carotenoid biosynthesis inhibitor, has a mechanism of action currently not used in crops. Field research focused on Palmer amaranth control by fluridone (224 g a.i. ha-1) applied PRE alone and in combination with acetochlor, diuron, pendimethalin, and half and full rates of fomesafen (1260, 560, 1063, 140, and 280 g a.i. ha-1, respectively). Also evaluated were fluridone (112 and 168 g ha-1) plus fomesafen 140 g ha-1, diuron 560 g ha-1 plus fomesafen 140 or 280 g ha-1, and acetochlor 1260 g ha-1 plus fomesafen 140 or 280 g ha-1. PRE herbicides were followed by glufosinate applied twice postemergence (POST) and diuron plus MSMA at layby. Fluridone injured cotton 3% or less and did not increase injury when combined with other herbicides. Palmer amaranth was controlled 97% by fluridone at 224 g ha-1 prior to glufosinate application compared with 87 to 95% control by acetochlor, diuron, fomesafen, or pendimethalin. Fluridone alone controlled Palmer amaranth as well as acetochlor plus fomesafen and better than diuron plus fomesafen. Similar control was obtained with fluridone at 112, 168, and 224 g ha-1, acetochlor, or diuron plus fomesafen at 140 g ha-1. Glufosinate controlled emerged weeds but continued emergence was noted in the absence of residual herbicides. PRE herbicides increased control prior to layby but did not increase cotton yield. This research demonstrated that fluridone can be used in a glufosinate-based system for proactive resistance management.
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Claims 10
Claim · model-written summary
Fluridone caused cotton injury of 3% or less.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- Fluridonee0
- Outcome
- injured cottone0
- Value
- 3% or lesse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fluridone injured cotton 3% or less”
Claim · model-written summary
Combining fluridone with other herbicides did not increase cotton injury.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- combined with other herbicidese0
- Outcome
- injurye0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“did not increase injury when combined with other herbicides.”
t0“Cotton”
Claim · model-written summary
Fluridone at 224 g ha-1 controlled Palmer amaranth by 97%, against 87 to 95% for comparator herbicides.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- fluridone at 224 g ha-1e0
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranth was controllede0
- Direction
- controllede0
- Value
- 97%e0
- Comparator
- acetochlor, diuron, fomesafen, or pendimethaline0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palmer amaranth was controlled 97% by fluridone at 224 g ha-1 prior to glufosinate application compared with 87 to 95% control by acetochlor, diuron, fomesafen, or pendimethalin.”
t0“Cotton”
Claim · model-written summary
Fluridone alone controlled Palmer amaranth as well as acetochlor plus fomesafen.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Fluridone alonee0
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranthe0
- Direction
- as well ase0
- Comparator
- acetochlor plus fomesafene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fluridone alone controlled Palmer amaranth as well as acetochlor plus fomesafen”
t0“Cotton”
Claim · model-written summary
Fluridone alone controlled Palmer amaranth better than diuron plus fomesafen.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Fluridone alonee0
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranthe0
- Direction
- better thane0
- Comparator
- diuron plus fomesafene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fluridone alone controlled Palmer amaranth as well as acetochlor plus fomesafen and better than diuron plus fomesafen.”
t0“Cotton”
Claim · model-written summary
Fluridone at three rates and acetochlor or diuron plus fomesafen had similar weed control.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- fluridone at 112, 168, and 224 g ha-1e0
- Outcome
- controle0
- Direction
- Similare0
- Comparator
- acetochlor, or diuron plus fomesafen at 140 g ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar control was obtained with fluridone at 112, 168, and 224 g ha-1, acetochlor, or diuron plus fomesafen at 140 g ha-1.”
t0“Cotton”
Claim · model-written summary
Glufosinate controlled emerged weeds.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Glufosinatee0
- Outcome
- emerged weedse0
- Direction
- controllede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glufosinate controlled emerged weeds”
t0“Cotton”
Claim · model-written summary
Weeds continued to emerge without residual herbicides.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- absence of residual herbicidese0
- Outcome
- continued emergencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“continued emergence was noted in the absence of residual herbicides.”
t0“Cotton”
Claim · model-written summary
Preemergence herbicides increased weed control before layby.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- PRE herbicidese0
- Outcome
- controle0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRE herbicides increased control prior to layby”
t0“Cotton”
Claim · model-written summary
Preemergence herbicides did not increase cotton yield.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- PRE herbicidese0
- Outcome
- cotton yielde0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PRE herbicides increased control prior to layby but did not increase cotton yield.”
The same questions in other papers
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See all 182 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.