TABLE 3.
The resistance levels of different G. coronaria populations to bispyribac, florasulam, flucarbazone, imazamox, and tribenuron herbicides.
| Herbicides (chemical family) | Population | I50 (μM) | F-value | RI |
| Bispyribac (BTP) | S | 3.34 | – | |
| R1 | 33.80 | 48.945*** | 10.242 | |
| R2 | 45.20 | 13.532 | ||
| Florasulam (TP) | S | 1.15 e–02 | – | |
| R1 | 3.76 e–02 | 11.732*** | 3.270 | |
| R2 | 6.34 e–02 | 5.513 | ||
| Flucarbazone (SCT) | S | 6.81 e–02 | – | |
| R1 | 1.17 e–01 | 11.645*** | 1.718 | |
| R2 | 1.15 e–01 | 1.689 | ||
| Imazamox (IMI) | S | 1.22 | – | |
| R1 | 12.03 | 4.6486*** | 9.861 | |
| R2 | 6.68 | 5.475 | ||
| Tribenuron (SU) | S | 0.44 | – | |
| R1 | 16.02 | 2.2309*** | 36.409 | |
| R2 | 11.91 | 27.068 |
SU, sulfonylurea; IMI, imidazolinone; TP, triazolopyrimidine; PTB, pyrimidinyl-thiobenzoates; SCT, sulfonyl-aminocarbonyl-triazolinone; I50, herbicide dose required to inhibit ALS activity by 50% compared with that of the untreated control, R1 and R2, resistant population; S, susceptible population. RI, resistance index = I50 (R1)/I50 (S); (RI) = I50 (R2)/I50. ***: the differences between populations are highly significant according to the Duncan test (P = 0.001).