Abstract
Abstract Tolpyralate is a new Group 27 pyrazolone herbicide that inhibits the 4-hydroxyphenyl-pyruvate dioxygenase enzyme. In a study of the biologically effective dose of tolpyralate from 2015 to 2017 in Ontario, Canada, tolpyralate exhibited efficacy on a broader range of species when co-applied with atrazine; however, there is limited published information on the efficacy of tolpyralate and tolpyralate+atrazine relative to mesotrione and topramezone, applied POST with atrazine at label rates, for control of annual grass and broadleaf weeds. In this study, tolpyralate applied alone at 30 g ai ha −1 provided >90% control of common lambsquarters, velvetleaf, common ragweed, Powell amaranth/redroot pigweed, and green foxtail at 8 weeks after application (WAA). Addition of atrazine was required to achieve >90% control of wild mustard, ladysthumb, and barnyardgrass at 8 WAA. Tolpyralate+atrazine (30+1,000 g ai ha −1 ) and topramezone+atrazine (12.5+500 g ai ha −1 ) provided similar control at 8 WAA of the eight weed species in this study; however, tolpyralate+atrazine provided >90% control of green foxtail by 1 WAA. Tolpyralate+atrazine provided 18, 68, and 67 percentage points better control of common ragweed, green foxtail, and barnyardgrass, respectively, than mesotrione+atrazine (100+280 g ai ha −1 ) at 8 WAA. Overall, tolpyralate+atrazine applied POST provided equivalent or improved control of annual grass and broadleaf weeds compared with mesotrione+atrazine and topramezone+atrazine.
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Claims 7
Claim · model-written summary
Tolpyralate alone gave over 90% control of five named weeds at 8 WAA.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- tolpyralate applied alone at 30 g ai ha −1e0
- Interactor
- common lambsquarters
Chenopodium albume0weed - Outcome
- control of common lambsquarters, velvetleaf, common ragweed, Powell amaranth/redroot pigweed, and green foxtaile0
- Direction
- >90%e0
- Value
- >90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tolpyralate applied alone at 30 g ai ha −1 provided >90% control of common lambsquarters, velvetleaf, common ragweed, Powell amaranth/redroot pigweed, and green foxtail at 8 weeks after application (WAA)”
t0“Weed Control in Corn”
Claim · model-written summary
Adding atrazine was needed for over 90% control of wild mustard, ladysthumb, and barnyardgrass at 8 WAA.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Addition of atrazinee0
- Interactor
- wild mustarde0weed
- Outcome
- control of wild mustard, ladysthumb, and barnyardgrasse0
- Direction
- >90%e0
- Value
- >90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of atrazine was required to achieve >90% control of wild mustard, ladysthumb, and barnyardgrass at 8 WAA”
t0“Weed Control in Corn”
Claim · model-written summary
Tolpyralate plus atrazine and topramezone plus atrazine gave similar control of eight weed species at 8 WAA.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Tolpyralate+atrazine (30+1,000 g ai ha −1 )e0
- Outcome
- control at 8 WAA of the eight weed speciese0
- Direction
- similare0
- Comparator
- topramezone+atrazine (12.5+500 g ai ha −1 )e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tolpyralate+atrazine (30+1,000 g ai ha −1 ) and topramezone+atrazine (12.5+500 g ai ha −1 ) provided similar control at 8 WAA of the eight weed species in this study”
t0“Weed Control in Corn”
Claim · model-written summary
Tolpyralate plus atrazine controlled over 90% of green foxtail by 1 WAA.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- tolpyralate+atrazinee0
- Interactor
- green foxtaile0weed
- Outcome
- control of green foxtaile0
- Direction
- >90%e0
- Value
- >90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tolpyralate+atrazine provided >90% control of green foxtail by 1 WAA”
t0“Weed Control in Corn”
Claim · model-written summary
Tolpyralate plus atrazine improved common ragweed control by 18 percentage points over mesotrione plus atrazine at 8 WAA.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Tolpyralate+atrazinee0
- Interactor
- common ragweed
Ambrosia artemisiifoliae0weed - Outcome
- control of common ragweede0
- Direction
- bettere0
- Value
- 18e0
- Comparator
- mesotrione+atrazine (100+280 g ai ha −1 )e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tolpyralate+atrazine provided 18, 68, and 67 percentage points better control of common ragweed, green foxtail, and barnyardgrass, respectively, than mesotrione+atrazine (100+280 g ai ha −1 ) at 8 WAA”
t0“Weed Control in Corn”
Claim · model-written summary
Tolpyralate plus atrazine improved green foxtail control by 68 percentage points over mesotrione plus atrazine at 8 WAA.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Tolpyralate+atrazinee0
- Interactor
- green foxtaile0weed
- Outcome
- better control of common ragweed, green foxtail, and barnyardgrasse0
- Direction
- bettere0
- Value
- 68e0
- Comparator
- mesotrione+atrazine (100+280 g ai ha −1 )e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tolpyralate+atrazine provided 18, 68, and 67 percentage points better control of common ragweed, green foxtail, and barnyardgrass, respectively, than mesotrione+atrazine (100+280 g ai ha −1 ) at 8 WAA”
t0“Weed Control in Corn”
Claim · model-written summary
Tolpyralate plus atrazine improved barnyardgrass control by 67 percentage points over mesotrione plus atrazine at 8 WAA.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Tolpyralate+atrazinee0
- Interactor
- barnyardgrass
Echinochloa crus-gallie0weed - Outcome
- better control of common ragweed, green foxtail, and barnyardgrasse0
- Direction
- bettere0
- Value
- 67e0
- Comparator
- mesotrione+atrazine (100+280 g ai ha −1 )e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tolpyralate+atrazine provided 18, 68, and 67 percentage points better control of common ragweed, green foxtail, and barnyardgrass, respectively, than mesotrione+atrazine (100+280 g ai ha −1 ) at 8 WAA”
t0“Weed Control in Corn”
The same questions in other papers
atrazine · control · Zea mays (maize)Positive and negative results
68 papers in the same direction as this paper · 15 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- positive
- positive
82 papers more in this group
See all 86 papers →tolpyralate · Chenopodium album · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
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.