Division Circumstances in which required

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.