Abstract
Field studies were conducted in 1999, 2000, and 2001 to investigate weed control and glyphosate-resistant corn tolerance to postemergence applications of mesotrione at 70, 105, and 140 g ai/ha applied with and without glyphosate at 560 g ai/ha. Mesotrione alone and mixed with glyphosate controlled smooth pigweed greater than 97% and common lambsquarters 93 to 99%. Control of common ragweed and morningglory species was variable. Common ragweed control was generally best when mesotrione was applied at 105 or 140 g/ha, and control increased only in 2000 with the addition of glyphosate. Giant foxtail control was below 25% with all rates of mesotrione, but mixtures of mesotrione plus glyphosate controlled giant foxtail 65 to 75%. Mesotrione injured glyphosate-resistant corn 4 to 24% when averaged over glyphosate rates, and injury was usually increased by higher mesotrione rates, with rainfall after herbicide applications, and in mixtures with glyphosate. Injury was transient and did not reduce corn yields. Mesotrione injury on glyphosate-resistant corn was confirmed in the greenhouse, where all mesotrione treatments reduced glyphosate-resistant corn biomass 9 to 23% compared with the nontreated check.Nomenclature: Glyphosate; mesotrione; common lambsquarters, Chenopodium album L. #3 CHEAL; common ragweed, Ambrosia artemisiifolia L. # AMBEL; giant foxtail, Setaria faberi Herrm. # SETFA; morningglory species, Ipomoea spp. # IPOSS; smooth pigweed, Amaranthus hybridus L. # AMACH; corn, Zea mays L. ‘Dekalb 626RR’, ‘Dekalb 5863RR’.Additional index words: IPOHE, IPOLA, Ipomoea hederacea (L.) Jacq., Ipomoea lacunosa L., Ipomoea purpurea L. Roth, IPOPU, total postemergence, transgenic crops, triketone herbicide.Abbreviations: DAT, days after treatment; POST, postemergence; WAT, weeks after treatment.
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Claims 16
Claim · model-written summary
Mesotrione alone controlled smooth pigweed more than 97%.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- Mesotrione alonee0
- Interactor
- smooth pigweed
Amaranthus hybriduse0weed - Outcome
- controlled smooth pigweede0
- Direction
- controllede0
- Value
- greater than 97%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mesotrione alone and mixed with glyphosate controlled smooth pigweed greater than 97%”
t0“Corn (Zea mays)”
Claim · model-written summary
Mesotrione mixed with glyphosate controlled smooth pigweed more than 97%.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- mixed with glyphosatee0
- Interactor
- smooth pigweedAmaranthus hybriduse0weed
- Outcome
- controlled smooth pigweede0
- Direction
- controllede0
- Value
- greater than 97%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mesotrione alone and mixed with glyphosate controlled smooth pigweed greater than 97%”
t0“Corn (Zea mays)”
Claim · model-written summary
Mesotrione alone controlled common lambsquarters 93 to 99%.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Mesotrione alonee0
- Interactor
- common lambsquarters
Chenopodium albume0weed - Outcome
- common lambsquarterse0
- Direction
- controllede0
- Value
- 93 to 99%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mesotrione alone and mixed with glyphosate controlled smooth pigweed greater than 97% and common lambsquarters 93 to 99%.”
t0“Corn (Zea mays)”
Claim · model-written summary
Mesotrione mixed with glyphosate controlled common lambsquarters 93 to 99%.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- mixed with glyphosatee0
- Interactor
- common lambsquartersChenopodium albume0weed
- Outcome
- common lambsquarterse0
- Direction
- controllede0
- Value
- 93 to 99%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mesotrione alone and mixed with glyphosate controlled smooth pigweed greater than 97% and common lambsquarters 93 to 99%.”
t0“Corn (Zea mays)”
Claim · model-written summary
Common ragweed control varied.
- Taxon
- CornZea mays subsp. mayst0
- Interactor
- common ragweed
Ambrosia artemisiifoliae0weed - Outcome
- Control of common ragweede0
- Direction
- variablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Control of common ragweed and morningglory species was variable.”
t0“Corn (Zea mays)”
Claim · model-written summary
Morningglory control varied.
- Taxon
- CornZea mays subsp. mayst0
- Interactor
- morningglory speciese0weed
- Outcome
- morningglory speciese0
- Direction
- variablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Control of common ragweed and morningglory species was variable.”
t0“Corn (Zea mays)”
Claim · model-written summary
Common ragweed control was best with mesotrione at 105 or 140 g/ha.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- mesotrione was applied at 105 or 140 g/hae0
- Interactor
- Common ragweedAmbrosia artemisiifoliae0weed
- Outcome
- Common ragweed controle0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Common ragweed control was generally best when mesotrione was applied at 105 or 140 g/ha”
t0“Corn (Zea mays)”
Claim · model-written summary
Glyphosate increased common ragweed control only in 2000.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- addition of glyphosatee0
- Interactor
- Common ragweedAmbrosia artemisiifoliae1weed
- Outcome
- Common ragweed controle1
- Direction
- increasede0
- Qualifier
- 2000e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“control increased only in 2000 with the addition of glyphosate”
e1“Common ragweed control was generally best”
t0“Corn (Zea mays)”
Claim · model-written summary
All mesotrione rates controlled giant foxtail below 25%.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- all rates of mesotrionee0
- Interactor
- Giant foxtaile0weed
- Outcome
- Giant foxtail controle0
- Direction
- belowe0
- Value
- 25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Giant foxtail control was below 25% with all rates of mesotrione”
t0“Corn (Zea mays)”
Claim · model-written summary
Mesotrione plus glyphosate controlled giant foxtail 65 to 75%.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- mixtures of mesotrione plus glyphosatee0
- Interactor
- giant foxtaile0weed
- Outcome
- controlled giant foxtaile0
- Direction
- controllede0
- Value
- 65 to 75%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mixtures of mesotrione plus glyphosate controlled giant foxtail 65 to 75%”
t0“Corn (Zea mays)”
Claim · model-written summary
Mesotrione injured resistant corn by 4 to 24%.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Mesotrionee0
- Outcome
- injured glyphosate-resistant corne0
- Direction
- injurede0
- Value
- 4 to 24%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mesotrione injured glyphosate-resistant corn 4 to 24% when averaged over glyphosate rates”
Claim · model-written summary
Higher mesotrione rates usually increased corn injury.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- higher mesotrione ratese0
- Outcome
- injurye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“injury was usually increased by higher mesotrione rates”
e1“Mesotrione injured glyphosate-resistant corn 4 to 24%”
Claim · model-written summary
Rainfall after herbicide application usually increased corn injury.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- rainfall after herbicide applicationse0
- Outcome
- injurye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“injury was usually increased by higher mesotrione rates, with rainfall after herbicide applications”
e1“Mesotrione injured glyphosate-resistant corn 4 to 24%”
Claim · model-written summary
Mesotrione and glyphosate mixtures usually increased corn injury.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- mixtures with glyphosatee0
- Outcome
- injurye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“injury was usually increased by higher mesotrione rates, with rainfall after herbicide applications, and in mixtures with glyphosate.”
e1“Mesotrione injured glyphosate-resistant corn 4 to 24%”
Claim · model-written summary
Transient mesotrione injury did not reduce corn yield.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Mesotrionee1
- Outcome
- corn yieldse0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Injury was transient and did not reduce corn yields.”
e1“Mesotrione injured glyphosate-resistant corn”
Claim · model-written summary
Greenhouse mesotrione treatments reduced resistant corn biomass by 9 to 23% versus untreated check.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- all mesotrione treatmentse0
- Outcome
- glyphosate-resistant corn biomasse0
- Direction
- reducede0
- Value
- 9 to 23%e0
- Comparator
- nontreated checke0
- Setting
- greenhousee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all mesotrione treatments reduced glyphosate-resistant corn biomass 9 to 23% compared with the nontreated check”
e1“confirmed in the greenhouse”
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See all 32 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.