Abstract
Two rice varieties, NERICA L19 (weed competitive) and ROK10 (high yielding) were subjected to two pre-emergence (RiceForce and ButaForce) and two post-emergence (Stam and RiceForce) with different active ingredients and rates of application during the wet seasons of 2009 and 2010 at Rokupr Mangrove Associated Swamp and at Gbomsamba in the Boliland to determine (i) the effectiveness of different rates of application of pre-and post emergence herbicides on weed growth and yield of rice varieties, (ii) identify suitable herbicides for the two ecologies and (iii) the cost benefit of herbicides application. The results showed significantly reduction in weed population with herbicides application (P=.05). Percentage reductions over control ranged from 65 to 91 percent in 2009 and from 68 to 87 percent in 2010. The herbicides Stam (PE), RiceForce (Pe) and ButaForce (Pe) were the most effective in reducing weed population (P=.05). All herbicides treatments gave significantly higher grain yields than control plots. Grain yields increased with increased rates of application but yields from full and three-quarter doses were similar. Yields of the two varieties at Rokupr were similar to Gbomsamba. The threequarter doses for the herbicides RiceForce (Pe) and ButaForce (Pe) could be considered for higher marginal returns. The herbicide, Stam (PE) though effective in reducing weed population gave low marginal returns. The results suggest that growing a weed competitive variety and a high yielding variety in conjunction with reduce herbicide rates of RiceForce (Pe) and ButaForce (Pe) could be an effective and economical weed management strategy for rice in the Mangrove Associated Swamp and Boliland ecologies in Sierra Leone.
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Claims 15
Claim · model-written summary
Herbicide application significantly reduced weed population.
Not reportedTaxonInteractorComparator
Verbatim
e0“The results showed significantly reduction in weed population with herbicides application (P=.05).”
Claim · model-written summary
Weed population reductions relative to control ranged from 65 to 91 percent in 2009.
- Outcome
- Percentage reductions over controle0
- Direction
- reductionse0
- Value
- 65 to 91 percente0
- Qualifier
- 2009e0
Not reportedTaxon
Verbatim
e0“Percentage reductions over control ranged from 65 to 91 percent in 2009”
Claim · model-written summary
Weed population reductions relative to control ranged from 68 to 87 percent in 2010.
Not reportedTaxonDirection
Verbatim
e0“from 68 to 87 percent in 2010”
Claim · model-written summary
Stam (PE) was among the most effective herbicides for reducing weed population.
Not reportedTaxonComparator
Verbatim
e0“The herbicides Stam (PE), RiceForce (Pe) and ButaForce (Pe) were the most effective in reducing weed population (P=.05).”
Claim · model-written summary
RiceForce (Pe) was among the most effective herbicides for reducing weed population.
Not reportedTaxonComparator
Verbatim
e0“The herbicides Stam (PE), RiceForce (Pe) and ButaForce (Pe) were the most effective in reducing weed population (P=.05).”
Claim · model-written summary
ButaForce (Pe) was among the most effective herbicides for reducing weed population.
Not reportedTaxonComparator
Verbatim
e0“The herbicides Stam (PE), RiceForce (Pe) and ButaForce (Pe) were the most effective in reducing weed population (P=.05).”
Claim · model-written summary
All herbicide treatments produced significantly higher rice grain yields than control plots.
Not reportedTaxon
Verbatim
e0“All herbicides treatments gave significantly higher grain yields than control plots.”
Claim · model-written summary
Grain yields increased as herbicide application rates increased.
Not reportedTaxon
Verbatim
e0“Grain yields increased with increased rates of application”
Claim · model-written summary
Grain yields were similar at full and three-quarter herbicide doses.
Not reportedTaxon
Verbatim
e0“yields from full and three-quarter doses were similar”
Claim · model-written summary
Yields of the two rice varieties at Rokupr were similar to Gbomsamba.
Not reportedTaxon
Verbatim
e0“Yields of the two varieties at Rokupr were similar to Gbomsamba.”
Claim · model-written summary
Three-quarter RiceForce (Pe) doses could give higher marginal returns.
Not reportedTaxon
Verbatim
e0“The threequarter doses for the herbicides RiceForce (Pe) and ButaForce (Pe) could be considered for higher marginal returns.”
Claim · model-written summary
Three-quarter ButaForce (Pe) doses could give higher marginal returns.
Not reportedTaxon
Verbatim
e0“The threequarter doses for the herbicides RiceForce (Pe) and ButaForce (Pe) could be considered for higher marginal returns.”
Claim · model-written summary
Stam (PE) had low marginal returns despite effective weed suppression.
Not reportedTaxon
Verbatim
e0“The herbicide, Stam (PE) though effective in reducing weed population gave low marginal returns.”
Claim · model-written summary
The authors recommend pairing weed competitive and high yielding rice varieties with reduced RiceForce (Pe) rates.
- Taxon
- rice
Oryza sativae0 - Treatment
- RiceForce (Pe)e0
- Outcome
- effective and economical weed management strategye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growing a weed competitive variety and a high yielding variety in conjunction with reduce herbicide rates of RiceForce (Pe) and ButaForce (Pe) could be an effective and economical weed management strategy for rice”
Claim · model-written summary
The authors recommend pairing weed competitive and high yielding rice varieties with reduced ButaForce (Pe) rates.
- Taxon
- riceOryza sativae0
- Treatment
- ButaForce (Pe)e0
- Outcome
- effective and economical weed management strategye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growing a weed competitive variety and a high yielding variety in conjunction with reduce herbicide rates of RiceForce (Pe) and ButaForce (Pe) could be an effective and economical weed management strategy for rice”
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See all 802 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.