Abstract
Abstract Rice in Mississippi is often in early seedling growth stages when paraquat-based herbicide treatments are commonly applied to corn, cotton, and soybean; therefore, off-target movement of the herbicide onto adjacent rice fields may occur. After an off-target movement event has occurred, weed management in the rice crop is still necessary. Field studies were conducted from 2019 to 2021 in Stoneville, MS, to evaluate rice injury and barnyardgrass control with labeled herbicides after exposure to a sublethal concentration of paraquat. Herbicide treatments were label-recommended rates of imazethapyr, quinclorac, propanil, bispyribac-sodium, cyhalopfop, and florpyrauxifen-benzyl applied following rice exposure to a sublethal concentration of paraquat. Rice injury was detected 7 and 28 d after treatment (DAT) and was ≥35% and ≥14%, respectively, for all herbicides. Florpyrauxifen-benzyl and imazethapyr caused the greatest rice injury at 28 DAT. Following paraquat exposure, barnyardgrass control was similar for all labeled herbicide treatments at 7, 14, and 28 DAT except for florpyrauxifen-benzyl and no herbicide (paraquat alone) at 7 DAT. Across all evaluations, barnyardgrass control was at least 12% greater following paraquat exposure and labeled herbicide treatments than with no paraquat exposure. The current research demonstrates that labeled rates of herbicides applied following exposure to a sublethal concentration of paraquat resulted in <36% injury and provided as great as 95% control of barnyardgrass, depending on the herbicide treatment. Therefore, the labeled herbicides choice following rice exposure to a sublethal concentration of paraquat should be based on weed spectrum.
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Claims 9
Claim · model-written summary
All tested herbicides caused at least 35% rice injury at 7 DAT after paraquat exposure.
- Taxon
- Rice
Oryza sativat0 - Treatment
- all herbicidese0
- Outcome
- Rice injurye0
- Direction
- injury was detectede0
- Value
- ≥35%e0
- Qualifier
- 7 and 28 d after treatment (DAT)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice injury was detected 7 and 28 d after treatment (DAT) and was ≥35% and ≥14%, respectively, for all herbicides.”
t0“rice injury”
Claim · model-written summary
All tested herbicides caused at least 14% rice injury at 28 DAT after paraquat exposure.
- Taxon
- RiceOryza sativat0
- Treatment
- all herbicidese0
- Outcome
- Rice injurye0
- Direction
- injury was detectede0
- Value
- ≥14%e0
- Qualifier
- 7 and 28 d after treatment (DAT)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice injury was detected 7 and 28 d after treatment (DAT) and was ≥35% and ≥14%, respectively, for all herbicides.”
t0“rice injury”
Claim · model-written summary
Florpyrauxifen-benzyl caused the greatest rice injury at 28 DAT.
- Taxon
- riceOryza sativae0
- Treatment
- Florpyrauxifen-benzyle0
- Outcome
- rice injurye0
- Direction
- greateste0
- Qualifier
- 28 DATe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Florpyrauxifen-benzyl and imazethapyr caused the greatest rice injury at 28 DAT.”
Claim · model-written summary
Imazethapyr caused the greatest rice injury at 28 DAT.
- Taxon
- riceOryza sativae0
- Treatment
- imazethapyre0
- Outcome
- rice injurye0
- Direction
- greateste0
- Qualifier
- 28 DATe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Florpyrauxifen-benzyl and imazethapyr caused the greatest rice injury at 28 DAT.”
Claim · model-written summary
Barnyardgrass control was similar across labeled herbicides at 7, 14 and 28 DAT after paraquat exposure, except florpyrauxifen-benzyl and paraquat alone at 7 DAT.
- Taxon
- riceOryza sativat0
- Treatment
- labeled herbicide treatmentse0
- Interactor
- barnyardgrass
Echinochloa crus-gallie0weed - Outcome
- barnyardgrass controle0
- Direction
- similare0
- Comparator
- no herbicide (paraquat alone)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Following paraquat exposure, barnyardgrass control was similar for all labeled herbicide treatments at 7, 14, and 28 DAT except for florpyrauxifen-benzyl and no herbicide (paraquat alone) at 7 DAT.”
t0“rice injury”
Claim · model-written summary
Barnyardgrass control was at least 12% greater with paraquat exposure followed by labeled herbicides than without paraquat exposure.
- Taxon
- riceOryza sativat0
- Treatment
- paraquat exposure and labeled herbicide treatmentse0
- Interactor
- barnyardgrassEchinochloa crus-gallie0weed
- Outcome
- barnyardgrass controle0
- Direction
- greatere0
- Value
- at least 12%e0
- Comparator
- no paraquat exposuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Across all evaluations, barnyardgrass control was at least 12% greater following paraquat exposure and labeled herbicide treatments than with no paraquat exposure.”
t0“rice injury”
Claim · model-written summary
Labeled herbicides after sublethal paraquat exposure caused less than 36% rice injury.
- Taxon
- riceOryza sativat0
- Treatment
- labeled rates of herbicides applied following exposure to a sublethal concentration of paraquate0
- Outcome
- injurye0
- Direction
- injurye0
- Value
- <36%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“labeled rates of herbicides applied following exposure to a sublethal concentration of paraquat resulted in <36% injury”
t0“rice injury”
Claim · model-written summary
Labeled herbicides after sublethal paraquat exposure controlled as much as 95% of barnyardgrass.
- Taxon
- riceOryza sativat0
- Treatment
- herbicide treatmente0
- Interactor
- barnyardgrassEchinochloa crus-gallie0weed
- Outcome
- control of barnyardgrasse0
- Direction
- as great ase0
- Value
- 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“provided as great as 95% control of barnyardgrass, depending on the herbicide treatment.”
t0“rice injury”
Claim · model-written summary
Herbicide choice after sublethal paraquat exposure in rice should follow the weed spectrum.
- Taxon
- riceOryza sativae0
- Outcome
- herbicides choicee0
- Qualifier
- weed spectrume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the labeled herbicides choice following rice exposure to a sublethal concentration of paraquat should be based on weed spectrum.”
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See all 53 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.