# Commission Regulation (EU) No 283/2013 of 1 March 2013 setting out the data requirements for active substances, in accordance with Regulation (EC) No 1107/2009 of the European Parliament and of the Council concerning the placing of plant protection products on the market (Text with EEA relevance), Division: Circumstances in which required

Extent: E+W+S+N.I.

Testing shall be carried out on one green alga (such as Pseudokirchneriella subcapitata, synonym Selenastrum capricornutum).
For active substances that exhibit herbicidal activity a test on a second species from a different taxonomic group shall be performed such as a diatom, for example Navicula pelliculosa.
The EC10, EC20, EC50 and corresponding NOEC values shall be provided.

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Source: https://www.legislation.gov.uk/eur/2013/283/annex/section/8/division/8.2/division/8.2.6/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2013-283/annex/section-8/division-8.2/division-8.2.6/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.