Abstract
Abstract Tolpyralate is a new 4-hydroxyphenyl-pyruvate dioxygenase (HPPD)–inhibiting herbicide for weed control in corn. Previous research has reported efficacy of tolpyralate + atrazine on several annual grass and broadleaf weed species; however, no studies have evaluated weed control of tolpyralate + atrazine depending on time-of-day (TOD) of application. Six field experiments were conducted over a 2-yr period (2018, 2019) near Ridgetown, ON, to determine if there is an effect of TOD of application on tolpyralate + atrazine efficacy on common annual grass and broadleaf weeds. An application was made at 3-h intervals beginning at 06:00 h with the last application at 24:00 h. There was a slight TOD effect on velvetleaf, pigweed species, and common ragweed control with tolpyralate + atrazine; however, the magnitude of change throughout the day was ≤3% at 2, 4, or 8 wk after application (WAA). There was no effect of TOD of tolpyralate + atrazine on the control of lambsquarters, barnyardgrass, and green foxtail. All weed species were controlled ≥88% at 8 WAA. There was no effect of TOD of tolpyralate + atrazine application on corn yield. Results of this study show no evidence of a TOD effect on weed control efficacy with tolpyralate + atrazine.
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Claims 6
Claim · model-written summary
Application time had a slight effect on velvetleaf control, at most 3% across the day.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- tolpyralate + atrazinee0
- Interactor
- velvetleaf
Abutilon theophrastie0weede1 - Outcome
- velvetleafe0
- Value
- ≤3%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a slight TOD effect on velvetleaf, pigweed species, and common ragweed control with tolpyralate + atrazine; however, the magnitude of change throughout the day was ≤3% at 2, 4, or 8 wk after application (WAA).”
e1“herbicide for weed control in corn”
Claim · model-written summary
Application time had a slight effect on pigweed species control, at most 3%.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- tolpyralate + atrazinee0
- Outcome
- pigweed speciese0
- Value
- ≤3%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a slight TOD effect on velvetleaf, pigweed species, and common ragweed control with tolpyralate + atrazine; however, the magnitude of change throughout the day was ≤3% at 2, 4, or 8 wk after application (WAA).”
e1“herbicide for weed control in corn”
Claim · model-written summary
Application time had a slight effect on common ragweed control, at most 3%.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- tolpyralate + atrazinee0
- Interactor
- common ragweed
Ambrosia artemisiifoliae0weede1 - Outcome
- common ragweed controle0
- Value
- ≤3%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a slight TOD effect on velvetleaf, pigweed species, and common ragweed control with tolpyralate + atrazine; however, the magnitude of change throughout the day was ≤3% at 2, 4, or 8 wk after application (WAA).”
e1“herbicide for weed control in corn”
Claim · model-written summary
Application time did not affect control of lambsquarters, barnyardgrass or green foxtail.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- TOD of tolpyralate + atrazinee0
- Outcome
- control of lambsquarters, barnyardgrass, and green foxtaile0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no effect of TOD of tolpyralate + atrazine on the control of lambsquarters, barnyardgrass, and green foxtail.”
e1“herbicide for weed control in corn”
Claim · model-written summary
All weed species were controlled by at least 88% at eight weeks.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- weed species were controllede0
- Value
- ≥88%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All weed species were controlled ≥88% at 8 WAA.”
e1“herbicide for weed control in corn”
Claim · model-written summary
Application time did not affect corn yield.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- TOD of tolpyralate + atrazine applicatione0
- Outcome
- corn yielde0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no effect of TOD of tolpyralate + atrazine application on corn yield.”
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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.