| Wording | DT50 normalised to 20°C for laboratory 23 incubations or not normalised DT50 for field studies (SFO equivalent, when biphasic, the DT90 was divided by 3.32 to estimate the DT50 when deciding on the wording to use) |
|---|---|
| Very low persistence | < 1 day |
| Low persistence | 1 to < 10 days |
| Moderate persistence | 10 to < 60 days |
| Medium persistence | 60 to < 100 days |
| High persistence | 100 days to < 1 year |
| Very high persistence | A year or more |
Note: These classes and descriptions are unrelated to any persistence class associated with the active substance cut‐off criteria in Annex II of Regulation (EC) No 1107/2009. For consideration made in relation to Annex II, see Appendix A.