Leaching and residual activity of imidazolinone herbicides in lowland soils
ABSTRACT: 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...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
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| Series: | Ciência Rural |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500154&lng=en&tlng=en |
| _version_ | 1811242940903718912 |
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| author | João Paulo Refatti Luis Antonio de Avila José Alberto Noldin Igor Pacheco Rodrigo Ribeiro Pestana |
| author_facet | João Paulo Refatti Luis Antonio de Avila José Alberto Noldin Igor Pacheco Rodrigo Ribeiro Pestana |
| author_sort | João Paulo Refatti |
| collection | DOAJ |
| description | ABSTRACT: 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. |
| first_indexed | 2024-04-12T13:58:24Z |
| format | Article |
| id | doaj.art-1ce297f0f2594210893a5d1642535dab |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-04-12T13:58:24Z |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-1ce297f0f2594210893a5d1642535dab2022-12-22T03:30:16ZengUniversidade Federal de Santa MariaCiência Rural1678-459647510.1590/0103-8478cr20160705S0103-84782017000500154Leaching and residual activity of imidazolinone herbicides in lowland soilsJoão Paulo RefattiLuis Antonio de AvilaJosé Alberto NoldinIgor PachecoRodrigo Ribeiro PestanaABSTRACT: 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500154&lng=en&tlng=enimazethapyrimazapicimazapyrcontaminaçãolençol freático |
| spellingShingle | João Paulo Refatti Luis Antonio de Avila José Alberto Noldin Igor Pacheco Rodrigo Ribeiro Pestana Leaching and residual activity of imidazolinone herbicides in lowland soils Ciência Rural imazethapyr imazapic imazapyr contaminação lençol freático |
| title | Leaching and residual activity of imidazolinone herbicides in lowland soils |
| title_full | Leaching and residual activity of imidazolinone herbicides in lowland soils |
| title_fullStr | Leaching and residual activity of imidazolinone herbicides in lowland soils |
| title_full_unstemmed | Leaching and residual activity of imidazolinone herbicides in lowland soils |
| title_short | Leaching and residual activity of imidazolinone herbicides in lowland soils |
| title_sort | leaching and residual activity of imidazolinone herbicides in lowland soils |
| topic | imazethapyr imazapic imazapyr contaminação lençol freático |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500154&lng=en&tlng=en |
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