Table 2. Phytotoxicity inhibition endpoints for individual herbicides after 24 and 48 h exposures.
| Herbicide | EC10 | 95% CI | EC50 = (1 TU) | 95% CI | R2 | ReP |
|---|---|---|---|---|---|---|
| 24 h exposures | ||||||
| Diuron | 1.2 | 1.0–1.5 | 4.3 | 3.9–4.7 | 0.99 | 1.0 |
| Fluometuron | 17 | 13–22 | 132 | 116 –150 | 0.99 | 0.033 |
| Tebuthiuron | 3.9 | 2.9–5.2 | 28 | 24–31 | 0.98 | 0.16 |
| Atrazine | 3.4 | 2.8–4.0 | 22 | 20–24 | 0.99 | 0.19 |
| Ametryn | 1.4 | 1.1–1.8 | 5.6 | 4.9–6.3 | 0.99 | 0.77 |
| Metribuzin | 1.9 | 1.6–2.3 | 7.0 | 6.5–7.5 | 0.99 | 0.61 |
| Simazine | 3.0 | 2.5–3.6 | 28 | 26–30 | 0.99 | 0.15 |
| Prometryn | 3.7 | 2.8–4.9 | 11 | 9.4–12 | 0.99 | 0.41 |
| Bromacil | 3.4 | 2.6–4.6 | 25 | 22–29 | 0.99 | 0.17 |
| Hexazinone | 6.4 | 5.6–7.3 | 17 | 16–18 | 0.99 | 0.26 |
| 48 h exposures | ||||||
| Ametryn | 0.8 | 0.6–1.0 | 3.5 | 3.0–4.0 | 0.99 | 1.23 |
| Metribuzin | 0.8 | 0.6–1.0 | 4.8 | 4.3–5.3 | 0.99 | 0.90 |
| Prometryn | 1.6 | 1.3–2.0 | 6.7 | 6.0–7.5 | 0.99 | 0.64 |
| Hexazinone | 2.5 | 2.0–3.0 | 11 | 9.7–12 | 0.99 | 0.41 |
Inhibition of ∆F/Fm’ IC10 and IC50 data (μg l−1) with 95% confidence intervals. Toxic units for the mixture experiments were assigned as 1 TU = IC50 at 24 h. Relative potencies (ReP), relative to diuron (IC50 diuron/IC50 herbicide).