Persistência na água e influência de herbicidas utilizados na lavoura arrozeira sobre a comunidade zooplanctônica de Cladocera, Copepoda e Rotifera

Reimche, Geovane Boschmann; Machado, Sérgio Luiz de Oliveira; Golombieski, Jaqueline Ineu; Baumart, Joele Schmitt; Braun, Neiva; Marchesan, Enio; Zanella, Renato

doi:10.1590/s0103-84782008000100002

Cited by 11 publications

(7 citation statements)

References 19 publications

(9 reference statements)

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“…This may have favored an increase in the abundance obtained in the last collection, since some taxa are sensitive to low levels of dissolved oxygen. The values of hardness and alkalinity were higher than in the present study compared to data from Golombieski et al (2008) and from Reimche et al (2008). A difference in the dissociation of ions of the compounds used in the experiments could explain this disparity.…”

Section: Discussioncontrasting

confidence: 95%

“…The negative influence of this pesticide was perceptible in this study, since in both collections the treated plot had the lowest abundance and diversity of taxa compared to the other treatments. This possible influence was also recorded by Reimche et al (2008), where the cladoceran assemblage showed a density variation caused by the stress of the application of this herbicide. The use of pesticides reduces the availability of food for the benthic macroinvertebrates and changes the structure of the algae community, and the toxic effect on these food resources may also be associated with this (Gagneten, 2002).…”

Section: Discussionmentioning

confidence: 55%

“…All the herbicides except Quinclorac showed lower persistence than found in some studies (USEPA, 1996;Stevens et al, 1998;Mesléard et al, 2005;Mize et al, 2008;. However, Quinclorac was at least 2.5 times more persistent than observed by Reimche et al (2008). An evaluation of the persistence of pesticides in water of rivers in the region found that the compounds forming the commercial formulation Only (Imazapic + Imazethapyr) were present in all the sampling periods (Silva et al, 2009b).…”

Section: Discussionmentioning

confidence: 62%

“…Quinclorac showed a different dynamic than that studied in the laboratory by Crosby (2003), where it showed low persistence. In the study by Reimche et al (2008), this pesticide was detected until the 31st day, with its highest concentration observed on the 7th day with 102 µg.L -1 . In the present study, its persistence was higher than the other pesticides investigated, being detected until day 84 in a concentration of 3.8 µg.L -1 concentration.…”

Section: Discussionmentioning

confidence: 90%

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The Impact of Herbicides on Benthic Organisms in Flooded Ricefields in Southern Brazil

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Herbicides and Environment

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“…Triplicate samples were taken from each plot, comprising a 1000 mL final sample after mixing, stored into amber glass bottles and transported to laboratory. Samples were analyzed for imazethapyr according to Santos et al (2008), imazapic by Reimche et al (2008), bispyribac-sodium by Kurz (2009) and penoxsulam by Zanella et al (2003), using High Performance Liquid Chromatography with Diode Array Detection (HPLC-DAD) with a Varian system (Palo Alto, CA, USA) composed of ProStar 210 pump and ProStar 335 DAD detector. The column configuration consisted of a Phenomenex (USA) C-18 reversed-phase column (250 × 4.6 mm; 5 μm) and a Phenomenex C-18 guard column (10 × 4.6 mm; 5 μm).…”

Section: Application and Analysis Of The Test Herbicidesmentioning

confidence: 99%