Publikation:
The auxin herbicide mecoprop-P in new light: Filling the data gap for dicotyledonous macrophytes

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dc.contributor.authorFeibicke, Michael
dc.contributor.authorGergs, René
dc.contributor.authorSahm, René
dc.contributor.authorHönemann, Linda
dc.contributor.authorKusebauch, Björn
dc.contributor.authorMohr, Silvia
dc.contributor.authorPérillon, Cécile
dc.date.accessioned2024-06-16T13:30:57Z
dc.date.available2024-06-16T13:30:57Z
dc.date.issued2021
dc.description.abstractMecoprop-P (MCPP-P) is an auxin herbicide which has been used against dicotyledonous weed plants since the 1980s. While fate and monitoring data of MCPP-P in the aquatic environment revealing concentrations up to 103 ÎÌg/L in freshwaters are well documented, only very few toxicity data and no studies with dicotyledonous macrophytes have been published in open literature so far. To fill up this essential data gap, a microcosm study was conducted in order to test the sensitivity of nine dicotyledonous and one Ceratophyllales macrophyte species. The plant species were exposed to seven MCPP-P concentrations ranging from 8 to 512 (micro)g/L for 21/22 days in one microcosm per concentration, and two further microcosms served as controls. Plant preparation was adapted to each species and endpoints were measured to calculate growth rates. Data were generated to obtain effect concentrations (ECX) which then were used to construct species sensitivity distribution curves (SSD). Eight species proved to be sensitive to MCPP-P in the tested concentration range with EC50 values ranging from 46.9 (micro)g/L for Ranunculus aquatilis to 656.4 (micro)g/L MCPP-P for Ludwigia repens. Taking the EC50 values of this study and published data for autotrophic organisms into account, a hazard concentration (HC5) of 2.7 (micro)g/L was derived from the SSD curve, while an SSD curve without dicotyledonous macrophytes resulted in an about 100 times higher HC5 (360.8 (micro)g/L MCCP-P). This confirms that a re-evaluation for old auxin herbicides by including dicotyledonous test species into the environmental risk assessment may be indicated. Furthermore, the use of MCPP-P in bitumen felts as protection against rooting by plants is not in the focus of any risk regulation so far. This application, however, can lead to high run-off concentrations that can enter surface waters easily, exceeding the new regulatory acceptable concentration values. © 2021 The Authorsen
dc.format.extent1 Onlineresource (9 pages)
dc.format.mediumonline resource
dc.identifier.doihttps://doi.org/10.60810/openumwelt-1495
dc.identifier.urihttps://openumwelt.de/handle/123456789/3188
dc.language.isoeng
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectMakrophyten
dc.titleThe auxin herbicide mecoprop-P in new light: Filling the data gap for dicotyledonous macrophytes
dc.typeWissenschaftlicher Artikel
dc.type.dcmitext
dc.type.mediumcomputer
dspace.entity.typePublication
local.bibliographicCitation.journalTitleEnvironmental Pollution
local.bibliographicCitation.originalDOI10.1016/j.envpol.2020.116405
local.bibliographicCitation.volume272 (2021)
local.collectionAufsätze
local.contributor.authorId(DE-588)1165070189
local.contributor.authorId(DE-588)114435464
local.contributor.authorId(DE-588)138980462
local.identifier.catalogId02487197
local.ingest.leader06486naa a2200000uu 4500
local.jointTitleTHE AUXIN HERBICIDE MECOPROPP IN NEW LIGHT FILLING THE DATA GAP FOR DICOTYLEDONOUS MACROPHYTES
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