Myriophyllum Spicatum Or M
AMRAP – workgroup Myriophyllum sp. Test Methodology for a Rooted Aquatic Macrophyte AMRAP – workgroup: method development P. Dohmen, G. Arts, E. Bruns, N. Cedergreen, J. Davies, M.Dobbs, U. Feiler, M. Hanson, U. Hommen, K. Knauer, J. Kubitza, D. Maletzki, L. Maltby, A. Poovey Myriophyllum sp. - Test Methodology Background Risk Assessment for aquatic plants is usually done using a limited number of tests systems. For pesticides RA, in the US generally 5 aquatic plant tests are required (green alga, blue-green alga, marine and freshwater diatom, higher aquatic plant (Lemna)); in the EU for herbicides two alga species and the higher aquatic plant test. Concern has been raised whether the information obtained is sufficient (sufficiently protective) for aquatic plant RA. Brock et al. (2000) showed, that the RA presently used in the EU (lowest endpoint from aquatic plants plus factor of 10) is generally sufficiently protective; however, they observed one exception (auxin type herbicide). In addition, there was a concern that exposure via sediment might be underestimated from substances with strong adsorption properties. 08.11.2010 Peter Dohmen et al., AMRAP - workgroup 2 Myriophyllum sp. - Test Methodology Background In conclusion: Concerns have been raised that RA based on algae and Lemna may not be protective of other macrophyte species due to potential differences in exposure route, recovery rate, or sensitivity to specific toxic modes of action. 08.11.2010 Peter Dohmen et al., AMRAP - workgroup 3 Myriophyllum sp. - Test Methodology Background To address these issues, the SETAC workshop "Aquatic Macrophyte Risk Assessment for Pesticides", AMRAP, was held in 2008. 08.11.2010 Peter Dohmen et al., AMRAP - workgroup 4 Myriophyllum sp.
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