Abstract
Dry-seeded rice systems are an emerging production technology in many Asian countries. A field study was conducted in 2011 and 2012 at the farm of the Rice Research and Development Institute, Batalagoda, Sri Lanka, to evaluate the performance of different herbicides in a dry-seeded rice system. Weed control treatments were nontreated (weedy), pretilachlor plus pyribenzoxim, cyhalofop-butyl, thiobencarb plus propanil, propanil, and bispyribac-sodium plus metamifop. All these POST herbicides were applied at 8 d after sowing, followed by an MCPA spray at 20 d after sowing. The dominant weeds in the study were barnyardgrass, Chinese sprangletop, and knotgrass. All herbicide treatments provided similar weed control, which ranged from 82 to 99%. Weeds in the nontreated plots reduced rice grain yield by 58 to 79% compared with the herbicide-treated plots. All herbicide-treated plots, except cyhalofop-butyl-treated ones, produced similar grain yield, which ranged from 3.7 to 4.2 t ha −1 in 2011 and from 6.0 to 7.0 t ha −1 in 2012. The results of our study suggest that different herbicides provided similar weed control and therefore different herbicides can be rotated in different seasons to reduce selection pressure on weeds.
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Claims 5
Claim · model-written summary
All herbicide treatments gave similar weed control of 82 to 99%.
- Taxon
- Rice
Oryza sativat0 - Treatment
- herbicide treatmentse1
- Outcome
- weed controle1
- Direction
- similare1
- Value
- 82 to 99%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“All herbicide treatments provided similar weed control, which ranged from 82 to 99%.”
t0“Performance of Different Herbicides in a Dry-Seeded Rice System in Sri Lanka”
Claim · model-written summary
Weeds in untreated plots reduced rice grain yield by 58 to 79% against herbicide-treated plots.
- Taxon
- riceOryza sativae1
- Treatment
- nontreated plotse1
- Interactor
- Weedse1weed
- Outcome
- rice grain yielde1
- Direction
- reducede1
- Value
- 58 to 79%e1
- Comparator
- herbicide-treated plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Weeds in the nontreated plots reduced rice grain yield by 58 to 79% compared with the herbicide-treated plots.”
Claim · model-written summary
Most herbicide-treated plots had similar grain yield of 3.7 to 4.2 t ha −1 in 2011.
Not reportedTaxon
Verbatim
e1“All herbicide-treated plots, except cyhalofop-butyl-treated ones, produced similar grain yield, which ranged from 3.7 to 4.2 t ha −1 in 2011 and from 6.0 to 7.0 t ha −1 in 2012.”
Claim · model-written summary
Most herbicide-treated plots had similar grain yield of 6.0 to 7.0 t ha −1 in 2012.
Not reportedTaxon
Verbatim
e1“All herbicide-treated plots, except cyhalofop-butyl-treated ones, produced similar grain yield, which ranged from 3.7 to 4.2 t ha −1 in 2011 and from 6.0 to 7.0 t ha −1 in 2012.”
Claim · model-written summary
The authors recommend rotating herbicides across seasons to reduce selection pressure on weeds.
Not reportedTaxon
Verbatim
e1“different herbicides can be rotated in different seasons to reduce selection pressure on weeds”
The same questions in other papers
herbicide · weed · Oryza sativa (rice)Positive and negative results
578 papers in the same direction as this paper · 17 in the opposite direction · 7 reporting no difference from an alternative
- positive
- negative
- no effect
599 papers more in this group
See all 603 papers →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.