Abstract
Abstract A study was conducted at three locations in Louisiana to evaluate the response of common Louisiana rice weed species to different rates of application of benzobicyclon herbicide. Benzobicyclon was applied at 31, 62, 123, 185, 246, 493, 739, 986, and 1,232 g ai ha –1 into flooded field conditions when ducksalad was at the first elongated-leaf stage. Barnyardgrass, false pimpernel, and yellow nutsedge control never exceeded 50% from any rate of benzobicyclon applied, averaged across evaluation timing. Ducksalad control, averaged across evaluation timing, was 83% when treated with 493 g ha −1 and did not increase when treated with higher rates of benzobicyclon. At 42 d after treatment (DAT), purple ammannia and Indian toothcup treated with 185 and 246 g ha –1 of benzobicyclon were controlled 58% and 81%, respectively, and did not differ in control compared with higher rates of benzobicyclon. All weeds were hand-harvested from each plot and separated by species at the conclusion of the study. No differences in fresh-weight biomass were observed for barnyardgrass, false pimpernel, purple ammannia, or yellow nutsedge. Treatment with benzobicyclon at ≥62 g ha –1 resulted in reduced ducksalad fresh weight 42 DAT compared with the nontreated sample. Indian toothcup fresh weight was reduced 77% to 96% compared with the nontreated sample when treated with benzobicyclon at 246 to 1,232 g ha –1 .
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Claims 7
Claim · model-written summary
Benzobicyclon control of barnyardgrass, false pimpernel, and yellow nutsedge never exceeded 50%.
- Taxon
- Rice
Oryza sativat0 - Treatment
- benzobicyclone0
- Interactor
- Barnyardgrass
Echinochloa crus-gallie0weed - Outcome
- controle0
- Direction
- never exceedede0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Barnyardgrass, false pimpernel, and yellow nutsedge control never exceeded 50% from any rate of benzobicyclon applied, averaged across evaluation timing.”
t0“Rice Weeds”
Claim · model-written summary
At 493 g ha −1, ducksalad control reached 83% and did not improve at higher rates.
- Taxon
- RiceOryza sativat0
- Treatment
- 493 g ha −1e0
- Interactor
- Ducksalade0weed
- Outcome
- Ducksalad controle0
- Direction
- did not increasee0
- Value
- 83%e0
- Comparator
- higher rates of benzobicyclone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ducksalad control, averaged across evaluation timing, was 83% when treated with 493 g ha −1 and did not increase when treated with higher rates of benzobicyclon.”
t0“Rice Weeds”
Claim · model-written summary
At 42 DAT, 185 g ha –1 benzobicyclon controlled purple ammannia by 58%.
- Taxon
- RiceOryza sativat0
- Treatment
- 185e0
- Interactor
- purple ammanniae0weed
- Outcome
- purple ammanniae0
- Direction
- controllede0
- Value
- 58%e0
- Comparator
- higher rates of benzobicyclone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 42 d after treatment (DAT), purple ammannia and Indian toothcup treated with 185 and 246 g ha –1 of benzobicyclon were controlled 58% and 81%, respectively, and did not differ in control compared with higher rates of benzobicyclon.”
t0“Rice Weeds”
Claim · model-written summary
At 42 DAT, 246 g ha –1 benzobicyclon controlled Indian toothcup by 81%.
- Taxon
- RiceOryza sativat0
- Treatment
- 246 g ha –1 of benzobicyclone0
- Interactor
- Indian toothcupe0weed
- Outcome
- Indian toothcupe0
- Direction
- controllede0
- Value
- 81%e0
- Comparator
- higher rates of benzobicyclone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 42 d after treatment (DAT), purple ammannia and Indian toothcup treated with 185 and 246 g ha –1 of benzobicyclon were controlled 58% and 81%, respectively, and did not differ in control compared with higher rates of benzobicyclon.”
t0“Rice Weeds”
Claim · model-written summary
Barnyardgrass, false pimpernel, purple ammannia and yellow nutsedge fresh biomass did not differ.
- Taxon
- RiceOryza sativat0
- Interactor
- barnyardgrassEchinochloa crus-gallie0weed
- Outcome
- fresh-weight biomasse0
- Direction
- No differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No differences in fresh-weight biomass were observed for barnyardgrass, false pimpernel, purple ammannia, or yellow nutsedge.”
t0“Rice Weeds”
Claim · model-written summary
Benzobicyclon at ≥62 g ha –1 reduced ducksalad fresh weight relative to untreated plants.
- Taxon
- RiceOryza sativat0
- Treatment
- benzobicyclon at ≥62 g ha –1e0
- Interactor
- ducksalade0weed
- Outcome
- ducksalad fresh weighte0
- Direction
- reducede0
- Comparator
- nontreated samplee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with benzobicyclon at ≥62 g ha –1 resulted in reduced ducksalad fresh weight 42 DAT compared with the nontreated sample.”
t0“Rice Weeds”
Claim · model-written summary
Benzobicyclon at 246 to 1,232 g ha –1 reduced Indian toothcup fresh weight by 77% to 96%.
- Taxon
- RiceOryza sativat0
- Treatment
- benzobicyclon at 246 to 1,232 g ha –1e0
- Interactor
- Indian toothcupe0weed
- Outcome
- Indian toothcup fresh weighte0
- Direction
- reducede0
- Value
- 77% to 96%e0
- Comparator
- nontreated samplee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Indian toothcup fresh weight was reduced 77% to 96% compared with the nontreated sample when treated with benzobicyclon at 246 to 1,232 g ha –1 .”
t0“Rice Weeds”
The same questions in other papers
benzobicyclon · Echinochloa crus-galli · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
benzobicyclon · growth · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
benzobicyclon · organism · Oryza sativa (rice)Results agree
2 papers in the same direction as this paper
- positive
- 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.