Table 3.
Effects of fenoxaprop-P-ethyl and 20 mmol L-1 CuSO4 on growth of resistant R1, R2, and R3 Beckmannia syzigachne plants.
| Treatments | % Inhibition of fresh weight (SE) | GR50 values (g a.i. ha-1) (SE)b | ||||||
|---|---|---|---|---|---|---|---|---|
| S | R1 | R2 | R3 | S | R1 | R2 | R3 | |
| 20 mmol/L CuSO4 | 1.32 (0.17) | 0.21 (0.07) | 1.11 (0.14) | 0.32 (0.04) | – | – | – | – |
| Fenoxaprop-P-ethyl | – | – | – | – | 44.8 (3.27) | 2412 (35.9) | 2029 (47.9) | 1217 (37.3) |
| Fenoxaprop-P-ethyl + 20 mmol/L CuSO4 | – | – | – | – | 43.8 (8.31) | 1876∗ (30.4) | 1539∗ (38.4) | 920∗ (49.9) |
b,∗ Difference between fenoxaprop-P-ethyl treatment and fenoxaprop-P-ethyl + 20 mmol/L CuSO4 treatment was tested for each population with an independent sample t-test. SE, standard error.