Abstract
Two field experiments were carried out at the Experimental Farm of Rice Department, Sakha Agricultural Research Station, Kafrelsheikh, Egypt throughout 2020 and 2021 summer seasons to identify an efficient chemical control program against Ipomea sp. as perennial Convolvulaceae weed in drill seeded-rice. The experimental design was split-plot with three replications. Three times of herbicidal application at 20, 30 and 40 days after sowing (DAS) were allocated randomly in main plots, while in sub-plots, six weed control treatments were randomly distributed included three single herbicides application (bentazone at rate of 1.714 kg ai ha-1, fluroxypyr at rate of 0.0952 kg ai ha-1 and bensulfuron-methyl at rate of 0.0714 kg ai ha-1) in addition to two herbicide mixtures were bentazone + fluroxypyr (1.344 kg ai ha-1 + 0.0952 kg ai ha-1) and bensulfuron + fluroxypyr (0.0714 kg ai ha-1 + 0.0952 kg ai ha-1) as compared to un-treated (weedy check) plots. Chemical control at early stage (20 DAS) achieved the best Ipomea control and recorded the lowest values of tillers number m-2, fresh and dry weights during 2020 and 2021, consequently recorded the highest rice dry matter, panicles number m-2, panicle weight and grain yield during both seasons. The results also showed that herbicide mixtures exceeded single application of herbicide in controlling Ipomea as broad leaf weed, bentazon + fluroxypyr ranked first in weed control efficiency percentage and recorded the lowest weed density m-2, fresh and dry weights of Ipomea during the two seasons of study as well as achieved the best values in rice dry matter, panicles per square meter, panicle weight and grain yield during 2020 and 2021 seasons, while the mixture of bensulfuron + fluroxypyr ranked second in this respect. The combination of bentazone + fluroxypyr sprayed at 20 DAS recorded the best Ipomea chemical control efficiency (95.4 %) and recorded the best rice grain yield (9.322 t ha-1) as an average for Giza 178 cv under drill seeded-rice conditions.
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Claims 13
Claim · model-written summary
Application at 20 DAS gave the best Ipomea control.
- Taxon
- Oryza sativa L.
Oryza sativat0 - Treatment
- Chemical control at early stage (20 DAS)e0
- Interactor
- Ipomeae0weed
- Outcome
- Ipomea controle0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“Chemical control at early stage (20 DAS) achieved the best Ipomea control”
Claim · model-written summary
Application at 20 DAS gave the lowest Ipomea tiller number.
- Taxon
- Oryza sativa L.Oryza sativat0
- Outcome
- tillers number m-2e0
- Direction
- loweste0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“recorded the lowest values of tillers number m-2, fresh and dry weights during 2020 and 2021”
Claim · model-written summary
Early chemical control gave the lowest weed fresh and dry weights.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- Chemical control at early stage (20 DAS)e0
- Interactor
- Ipomeae0weed
- Outcome
- fresh and dry weightse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“Chemical control at early stage (20 DAS) achieved the best Ipomea control and recorded the lowest values of tillers number m-2, fresh and dry weights”
Claim · model-written summary
Early chemical control gave the highest rice dry matter and panicle measures.
- Taxon
- Oryza sativa L.Oryza sativat0
- Outcome
- rice dry matter, panicles number m-2, panicle weighte0
- Direction
- higheste0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“consequently recorded the highest rice dry matter, panicles number m-2, panicle weight and grain yield during both seasons”
Claim · model-written summary
Early chemical control gave the highest grain yield.
- Taxon
- Oryza sativa L.Oryza sativat0
- Outcome
- grain yielde0
- Direction
- higheste0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“consequently recorded the highest rice dry matter, panicles number m-2, panicle weight and grain yield during both seasons”
Claim · model-written summary
Herbicide mixtures exceeded single herbicides for Ipomea control.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- herbicide mixturese0
- Interactor
- Ipomeae0weed
- Outcome
- controlling Ipomeae0
- Direction
- exceedede0
- Comparator
- single application of herbicidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“herbicide mixtures exceeded single application of herbicide in controlling Ipomea as broad leaf weed”
Claim · model-written summary
Bentazon plus fluroxypyr ranked first in weed control efficiency.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- bentazon + fluroxypyre0
- Outcome
- weed control efficiency percentagee0
- Direction
- ranked firste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“bentazon + fluroxypyr ranked first in weed control efficiency percentage”
Claim · model-written summary
Bentazon plus fluroxypyr gave the lowest Ipomea density and weights.
- Taxon
- Oryza sativa L.Oryza sativat0
- Interactor
- Ipomeae0weed
- Outcome
- weed density m-2, fresh and dry weights of Ipomeae0
- Direction
- loweste0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“recorded the lowest weed density m-2, fresh and dry weights of Ipomea”
Claim · model-written summary
Bentazon plus fluroxypyr gave the best rice dry matter and panicle measures.
- Taxon
- Oryza sativa L.Oryza sativat0
- Outcome
- rice dry matter, panicles per square meter, panicle weighte0
- Direction
- beste0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“achieved the best values in rice dry matter, panicles per square meter, panicle weight and grain yield”
Claim · model-written summary
Bentazon plus fluroxypyr gave the best rice grain yield.
- Taxon
- Oryza sativa L.Oryza sativat0
- Outcome
- grain yielde0
- Direction
- beste0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“achieved the best values in rice dry matter, panicles per square meter, panicle weight and grain yield”
Claim · model-written summary
Bensulfuron plus fluroxypyr ranked second.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- bensulfuron + fluroxypyre0
- Outcome
- ranked second in this respecte0
- Direction
- ranked seconde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“the mixture of bensulfuron + fluroxypyr ranked second in this respect”
Claim · model-written summary
Bentazone plus fluroxypyr at 20 DAS gave 95.4% Ipomea control efficiency.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- bentazone + fluroxypyr sprayed at 20 DASe0
- Interactor
- Ipomeae0weed
- Outcome
- Ipomea chemical control efficiencye0
- Direction
- beste0
- Value
- 95.4 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“The combination of bentazone + fluroxypyr sprayed at 20 DAS recorded the best Ipomea chemical control efficiency (95.4 %)”
Claim · model-written summary
Bentazone plus fluroxypyr at 20 DAS gave rice yield of 9.322 t ha-1.
- Taxon
- Oryza sativa L.Oryza sativat0
- Treatment
- bentazone + fluroxypyr sprayed at 20 DASe0
- Outcome
- rice grain yielde0
- Direction
- beste0
- Value
- 9.322 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oryza sativa L.”
e0“The combination of bentazone + fluroxypyr sprayed at 20 DAS recorded the best Ipomea chemical control efficiency (95.4 %) and recorded the best rice grain yield (9.322 t ha-1)”
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