Abstract
Abstract Field studies were conducted to evaluate linuron for POST control of Palmer amaranth in sweetpotato to minimize reliance on protoporphyrinogen oxidase (PPO)-inhibiting herbicides. Treatments were arranged in a two by four factorial in which the first factor consisted of two rates of linuron (420 and 700 g ai ha −1 ), and the second factor consisted of linuron applied alone or in combinations of linuron plus a nonionic surfactant (NIS; 0.5% vol/vol), linuron plus S -metolachlor (800 g ai ha −1 ), or linuron plus NIS plus S -metolachlor. In addition, S -metolachlor alone and nontreated weedy and weed-free checks were included for comparison. Treatments were applied to ‘Covington’ sweetpotato 8 d after transplanting (DAP). S -metolachlor alone provided poor Palmer amaranth control because emergence had occurred at applications. All treatments that included linuron resulted in at least 98% and 91% Palmer amaranth control 1 and 2 wk after treatment (WAT), respectively. Including NIS with linuron did not increase Palmer amaranth control compared to linuron alone, but it resulted in greater sweetpotato injury and subsequently decreased total sweetpotato yield by 25%. Including S -metolachlor with linuron resulted in the greatest Palmer amaranth control 4 WAT, but increased crop foliar injury to 36% 1 WAT compared to 17% foliar injury from linuron alone. Marketable and total sweetpotato yields were similar between linuron alone and linuron plus S -metolachlor or S -metolachlor plus NIS treatments, though all treatments resulted in at least 39% less total yield than the weed-free check resulting from herbicide injury and/or Palmer amaranth competition. Because of the excellent POST Palmer amaranth control from linuron 1 WAT, a system that includes linuron applied 7 DAP followed by S -metolachlor applied 14 DAP could help to extend residual Palmer amaranth control further into the critical period of weed control while minimizing sweetpotato injury.
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Claims 10
Claim · model-written summary
Treatments including linuron gave at least 98% and 91% Palmer amaranth control at 1 and 2 weeks after treatment.
- Taxon
- sweetpotato
_Flower.jpg?width=60)
Ipomoea batatast0 - Treatment
- linurone1
- Interactor
- Palmer amaranthe1weed
- Outcome
- Palmer amaranth controle1
- Direction
- increaseinferrede1
- Value
- 98% and 91%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
t0“in sweetpotato”
e1“All treatments that included linuron resulted in at least 98% and 91% Palmer amaranth control 1 and 2 wk after treatment (WAT), respectively”
Claim · model-written summary
NIS added to linuron did not increase Palmer amaranth control compared with linuron alone.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- NIS with linurone1
- Interactor
- Palmer amaranthe1weed
- Outcome
- Palmer amaranth controle1
- Comparator
- linuron alonee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in sweetpotato”
e1“Including NIS with linuron did not increase Palmer amaranth control compared to linuron alone, but it resulted in greater sweetpotato injury and subsequently decreased total sweetpotato yield by 25%”
Claim · model-written summary
NIS added to linuron resulted in greater sweetpotato injury than linuron alone.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- NIS with linurone1
- Outcome
- sweetpotato injurye1
- Direction
- greatere1
- Comparator
- linuron alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in sweetpotato”
e1“Including NIS with linuron did not increase Palmer amaranth control compared to linuron alone, but it resulted in greater sweetpotato injury and subsequently decreased total sweetpotato yield by 25%”
Claim · model-written summary
NIS added to linuron decreased total sweetpotato yield by 25%.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- NIS with linurone1
- Outcome
- total sweetpotato yielde1
- Direction
- decreasede1
- Value
- 25%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in sweetpotato”
e1“Including NIS with linuron did not increase Palmer amaranth control compared to linuron alone, but it resulted in greater sweetpotato injury and subsequently decreased total sweetpotato yield by 25%”
Claim · model-written summary
S -metolachlor with linuron gave the greatest Palmer amaranth control at 4 weeks after treatment.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- S -metolachlor with linurone1
- Interactor
- Palmer amaranthe1weed
- Outcome
- Palmer amaranth controle1
- Direction
- greateste1
- Qualifier
- 4 WATe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in sweetpotato”
e1“Including S -metolachlor with linuron resulted in the greatest Palmer amaranth control 4 WAT, but increased crop foliar injury to 36% 1 WAT compared to 17% foliar injury from linuron alone”
Claim · model-written summary
S -metolachlor with linuron increased crop foliar injury to 36% at 1 week, against 17% with linuron alone.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- S -metolachlor with linurone1
- Outcome
- crop foliar injurye1
- Direction
- increasede1
- Value
- 36%e1
- Qualifier
- 1 WATe1
- Comparator
- linuron alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in sweetpotato”
e1“Including S -metolachlor with linuron resulted in the greatest Palmer amaranth control 4 WAT, but increased crop foliar injury to 36% 1 WAT compared to 17% foliar injury from linuron alone”
Claim · model-written summary
Marketable and total sweetpotato yields were similar between linuron alone and linuron plus S-metolachlor.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- linuron plus S -metolachlore1
- Outcome
- Marketable and total sweetpotato yieldse1
- Direction
- similare1
- Comparator
- linuron alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in sweetpotato”
e1“Marketable and total sweetpotato yields were similar between linuron alone and linuron plus S -metolachlor or S -metolachlor plus NIS treatments”
Claim · model-written summary
All treatments reduced total sweetpotato yield by at least 39% relative to the weed-free check.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- all treatmentse1
- Outcome
- total yielde1
- Direction
- lesse1
- Value
- 39%e1
- Qualifier
- resulting from herbicide injury and/or Palmer amaranth competitione1
- Comparator
- weed-free checke1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in sweetpotato”
e1“all treatments resulted in at least 39% less total yield than the weed-free check resulting from herbicide injury and/or Palmer amaranth competition”
Claim · model-written summary
Linuron applied 7 DAP followed by S -metolachlor at 14 DAP could extend residual Palmer amaranth control while minimizing sweetpotato injury.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- linuron applied 7 DAP followed by S -metolachlor applied 14 DAPe1
- Outcome
- extend residual Palmer amaranth controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in sweetpotato”
e1“a system that includes linuron applied 7 DAP followed by S -metolachlor applied 14 DAP could help to extend residual Palmer amaranth control further into the critical period of weed control while minimizing sweetpotato injury”
Claim · model-written summary
S -metolachlor alone gave poor Palmer amaranth control.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- S -metolachlor alonee1
- Interactor
- Palmer amaranthe1weed
- Outcome
- Palmer amaranth controle1
- Direction
- poore1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in sweetpotato”
e1“S -metolachlor alone provided poor Palmer amaranth control because emergence had occurred at applications”
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See all 7 papers →metolachlor · quality: postharvest · Ipomoea batatas (sweet potato)Positive and negative results
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See all 8 papers →linuron · yield · Ipomoea batatas (sweet potato)Results agree
1 paper in the same direction as this paper
- negative
linuron · quality: postharvest · Ipomoea batatas (sweet potato)Results agree
2 papers in the same direction as this paper
- no effect
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linuron · crop injury · Ipomoea batatas (sweet potato)Results agree
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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.