Abstract
No-till mechanized-transplanted rice was evaluated for different combinations of pre- and post-emergence herbicides to determine feasible, economically viable weed management options to control complex weed flora in rice fields. All pre-emergence herbicides significantly reduced the population of grassy weeds; of these, pendimethalin resulted in the greatest reductions (83%) at 15 days after transplanting (DAT). Among five post-emergence herbicide treatments, the combination of bispyribac-sodium (10%SP) + pyrazosulfuron (10%WP) was found to be the most effective in controlling all weed flora at both 35 and 55 DAT. The sequential application of pendimethalin (pre-emergence) followed bispyribac-sodium + pyrazosulfuron (post-emergence) resulted in significantly higher rice grain yield (4.4 t-ha−1) and relative gross-margin (417 USD-ha−1) than all other treatments. A strong negative correlation was observed between rice grain yield and weed biomass, and a strong positive correlation between rice grain yield and weed control efficiency. Our findings demonstrate the potential to combine pre- and post-emergence herbicides in no-till mechanized-transplanted rice; these findings have applications globally in regions where rice is established by no-till or mechanized transplanting.
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Claims 8
Claim · model-written summary
All pre-emergence herbicides significantly reduced grassy weed populations.
- Taxon
- rice
Oryza sativat0 - Treatment
- pre-emergence herbicidese0
- Interactor
- grassy weedse0weed
- Outcome
- population of grassy weedse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All pre-emergence herbicides significantly reduced the population of grassy weeds”
t0“rice”
Claim · model-written summary
Pendimethalin gave the greatest reduction in grassy weeds, 83%, at 15 days after transplanting.
- Taxon
- riceOryza sativat0
- Treatment
- pendimethaline0
- Interactor
- grassy weedse1weed
- Outcome
- population of grassy weedse1
- Direction
- greatest reductionse0
- Value
- 83%e0
- Qualifier
- 15 days after transplanting (DAT)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“of these, pendimethalin resulted in the greatest reductions (83%) at 15 days after transplanting (DAT)”
e1“population of grassy weeds”
t0“rice”
Claim · model-written summary
Bispyribac-sodium plus pyrazosulfuron was the most effective post-emergence treatment for controlling all weed flora at 35 and 55 DAT.
- Taxon
- riceOryza sativat0
- Treatment
- bispyribac-sodium (10%SP) + pyrazosulfuron (10%WP)e0
- Interactor
- weed florae0weed
- Outcome
- controlling all weed florae0
- Direction
- most effectivee0
- Qualifier
- both 35 and 55 DATe0
- Comparator
- five post-emergence herbicide treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among five post-emergence herbicide treatments, the combination of bispyribac-sodium (10%SP) + pyrazosulfuron (10%WP) was found to be the most effective in controlling all weed flora at both 35 and 55 DAT.”
t0“rice”
Claim · model-written summary
Sequential pendimethalin then bispyribac-sodium plus pyrazosulfuron gave significantly higher rice grain yield of 4.4 t-ha−1 than other treatments.
- Taxon
- riceOryza sativae0
- Treatment
- pendimethalin (pre-emergence) followed bispyribac-sodium + pyrazosulfuron (post-emergence)e0
- Outcome
- rice grain yielde0
- Direction
- highere0
- Value
- 4.4 t-ha−1e0
- Comparator
- all other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sequential application of pendimethalin (pre-emergence) followed bispyribac-sodium + pyrazosulfuron (post-emergence) resulted in significantly higher rice grain yield (4.4 t-ha−1) and relative gross-margin (417 USD-ha−1) than all other treatments.”
Claim · model-written summary
The same sequential herbicides gave significantly higher relative gross margin of 417 USD-ha−1 than other treatments.
- Taxon
- riceOryza sativae0
- Treatment
- pendimethalin (pre-emergence) followed bispyribac-sodium + pyrazosulfuron (post-emergence)e0
- Outcome
- relative gross-margine0
- Direction
- highere0
- Value
- 417 USD-ha−1e0
- Comparator
- all other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sequential application of pendimethalin (pre-emergence) followed bispyribac-sodium + pyrazosulfuron (post-emergence) resulted in significantly higher rice grain yield (4.4 t-ha−1) and relative gross-margin (417 USD-ha−1) than all other treatments.”
Claim · model-written summary
Rice grain yield was strongly negatively correlated with weed biomass.
- Taxon
- riceOryza sativae0
- Interactor
- weede0weed
- Outcome
- rice grain yielde0
- Direction
- negativee0
- Qualifier
- weed biomasse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A strong negative correlation was observed between rice grain yield and weed biomass”
Claim · model-written summary
Rice grain yield was strongly positively correlated with weed control efficiency.
- Taxon
- riceOryza sativat0
- Interactor
- weede0weed
- Outcome
- rice grain yielde0
- Direction
- positivee0
- Qualifier
- weed control efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a strong positive correlation between rice grain yield and weed control efficiency”
t0“rice”
Claim · model-written summary
The authors propose combining pre- and post-emergence herbicides for no-till mechanized-transplanted rice in suitable regions globally.
- Taxon
- riceOryza sativae0
- Outcome
- combine pre- and post-emergence herbicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our findings demonstrate the potential to combine pre- and post-emergence herbicides in no-till mechanized-transplanted rice; these findings have applications globally in regions where rice is established by no-till or mechanized transplanting.”
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