Table 3.
Sensitivity to other ACCase-inhibiting herbicides in Leptochloa chinensis populations.
| Herbicide | Population | Slope (SE) a | ED50 (95% CI) b (g a.i. ha-1) | RR c |
|---|---|---|---|---|
| Metamifop | LC-S | 1.21 (0.13) | 2.1 (1.4–3.1) | 1.0 |
| LC-1701 | 1.28 (0.22) | 6.0 (3.5–10.4) | 2.9 | |
| LC-1704 | 1.51 (0.35) | 12.1 (7.1–20.8) | 5.8 | |
| Fenoxaprop-P-ethyl | LC-S | 1.24 (0.30) | 0.7 (0.3–1.4) | 1.0 |
| LC-1701 | 1.40 (0.14) | 15.6 (11.9–20.3) | 22.3 | |
| LC-1704 | 1.56 (0.51) | 7.7 (2.8–21.3) | 11.0 | |
| Haloxyfop-R-methyl | LC-S | 2.02 (0.33) | 1.4 (1.0–2.0) | 1.0 |
| LC-1701 | 1.58 (0.23) | 3.0 (1.9–4.7) | 2.1 | |
| LC-1704 | 1.20 (0.21) | 6.2 (3.6–10.8) | 4.4 | |
| Quizalofop-P-ethyl | LC-S | 1.90 (0.35) | 0.8 (0.5–1.5) | 1.0 |
| LC-1701 | 2.05 (0.92) | 4.4 (1.4–13.6) | 5.5 | |
| LC-1704 | 2.75 (0.36) | 3.5 (2.6–4.6) | 4.4 | |
| Clodinafop-propargyl | LC-S | 1.58 (0.24) | 0.4 (0.3–0.7) | 1.0 |
| LC-1701 | 2.19 (0.61) | 6.3 (3.1–12.5) | 15.8 | |
| LC-1704 | 1.96 (0.56) | 4.6 (2.7–8.0) | 11.5 | |
| Fluzifop-P-butyl | LC-S | 1.52 (0.46) | 0.7 (0.3–1.4) | 1.0 |
| LC-1701 | 3.10 (0.46) | 8.3 (6.6–10.4) | 11.9 | |
| LC-1704 | 1.01 (0.28) | 3.4 (1.5–7.7) | 4.9 | |
| Sethoxydim | LC-S | 0.95 (0.10) | 34.4 (22.2–53.3) | 1.0 |
| LC-1701 | 2.46 (0.50) | 16.9 (11.4–24.9) | 0.5 | |
| LC-1704 | 6.91 (2.48) | 3.9 (2.3–6.8) | 0.1 | |
| Pinoxaden | LC-S | 0.70 (0.19) | 40.4 (16.1–101) | 1.0 |
| LC-1701 | 1.78 (0.15) | 235 (185–298) | 5.8 | |
| LC-1704 | 1.06 (0.07) | 24.8 (19.0–32.2) | 0.6 |
a
standard error.
b
95% confidence interval.
c
RR (resistance ratio) = herbicide ED50 for resistant populations/herbicide ED50 for LC-S population.