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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
27/04/2017 |
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Data da última atualização: |
27/04/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - B |
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Autoria: |
REFATTI, J. P.; AVILA, L. A.; NOLDIN, J. A.; PACHECO, I.; PESTANA, R. R. |
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Título: |
Leaching and residual activity of imidazolinone herbicides in lowland soils. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Ciência Rural, Santa Maria, RS, v. 47, n. 5, 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
Herbicides used in the Clearfield® rice (Oryza sativa L.) production system have a potential for leaching. This can result in contamination
of underground water resources and cause injury to not tolerant crops that are sown in a succession and/or crop rotation. The objective of this study was
to determine the leaching potential and the residual activity of the herbicides used in the Clearfield® rice system. The experiment was conducted over a
period of two years and consisted of conducting a field test to be followed by two bioassays with a year of difference between their implementation. Initially
an experiment was conducted in lowland area where it was planted the cultivar of rice ?PUITA INTA CL?. Approximately one and two years thereafter, soil
samples from each plot were collected at intervals of 5cm to a depth of 30cm (B factor) for the bioassay to evaluate persistence of herbicides. Factor A
was composed of mixtures formulated of imazethapyr + imazapic (75 + 25g a.i. L-1), imazapyr + imazapic (525 + 175g a.i. kg-1) in two doses, imazethapyr
(100g a.i. L-1) and treatment control without application. Basing on results, it was concluded that the mixtures imazethapyr + imazapic, imazapyr +
imazapic and imazethapyr leached into the soil, reaching depths of up to 25cm in lowland soil. Imidazolinone herbicides used today in the irrigated rice
Clearfield® system are persistent in soil, and their phytotoxic activity can be observed up to two years after application.
Key words: imazethapyr, imazapic, imazapyr, contamination, groundwater MenosHerbicides used in the Clearfield® rice (Oryza sativa L.) production system have a potential for leaching. This can result in contamination
of underground water resources and cause injury to not tolerant crops that are sown in a succession and/or crop rotation. The objective of this study was
to determine the leaching potential and the residual activity of the herbicides used in the Clearfield® rice system. The experiment was conducted over a
period of two years and consisted of conducting a field test to be followed by two bioassays with a year of difference between their implementation. Initially
an experiment was conducted in lowland area where it was planted the cultivar of rice ?PUITA INTA CL?. Approximately one and two years thereafter, soil
samples from each plot were collected at intervals of 5cm to a depth of 30cm (B factor) for the bioassay to evaluate persistence of herbicides. Factor A
was composed of mixtures formulated of imazethapyr + imazapic (75 + 25g a.i. L-1), imazapyr + imazapic (525 + 175g a.i. kg-1) in two doses, imazethapyr
(100g a.i. L-1) and treatment control without application. Basing on results, it was concluded that the mixtures imazethapyr + imazapic, imazapyr +
imazapic and imazethapyr leached into the soil, reaching depths of up to 25cm in lowland soil. Imidazolinone herbicides used today in the irrigated rice
Clearfield® system are persistent in soil, and their phytotoxic activity can be observed up to two years after application.
Key words: ... Mostrar Tudo |
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Palavras-Chave: |
contamination; groundwater; imazapic; imazapyr; imazethapyr. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02190naa a2200229 a 4500
001 1126156
005 2017-04-27
008 2017 bl uuuu u00u1 u #d
100 1 $aREFATTI, J. P.
245 $aLeaching and residual activity of imidazolinone herbicides in lowland soils.$h[electronic resource]
260 $c2017
520 $aHerbicides used in the Clearfield® rice (Oryza sativa L.) production system have a potential for leaching. This can result in contamination of underground water resources and cause injury to not tolerant crops that are sown in a succession and/or crop rotation. The objective of this study was to determine the leaching potential and the residual activity of the herbicides used in the Clearfield® rice system. The experiment was conducted over a period of two years and consisted of conducting a field test to be followed by two bioassays with a year of difference between their implementation. Initially an experiment was conducted in lowland area where it was planted the cultivar of rice ?PUITA INTA CL?. Approximately one and two years thereafter, soil samples from each plot were collected at intervals of 5cm to a depth of 30cm (B factor) for the bioassay to evaluate persistence of herbicides. Factor A was composed of mixtures formulated of imazethapyr + imazapic (75 + 25g a.i. L-1), imazapyr + imazapic (525 + 175g a.i. kg-1) in two doses, imazethapyr (100g a.i. L-1) and treatment control without application. Basing on results, it was concluded that the mixtures imazethapyr + imazapic, imazapyr + imazapic and imazethapyr leached into the soil, reaching depths of up to 25cm in lowland soil. Imidazolinone herbicides used today in the irrigated rice Clearfield® system are persistent in soil, and their phytotoxic activity can be observed up to two years after application. Key words: imazethapyr, imazapic, imazapyr, contamination, groundwater
653 $acontamination
653 $agroundwater
653 $aimazapic
653 $aimazapyr
653 $aimazethapyr
700 1 $aAVILA, L. A.
700 1 $aNOLDIN, J. A.
700 1 $aPACHECO, I.
700 1 $aPESTANA, R. R.
773 $tCiência Rural, Santa Maria, RS$gv. 47, n. 5, 2017.
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