Table 2.
The effective mesotrione doses (g ha−1) that caused 50% growth inhibition (GR50) in different generations of A. palmeri collected from an agricultural field.
| Generation | GR50 a | Sensitivity Index b |
|---|---|---|
| F0 | 23.57 (2.00) | - |
| F2 | 39.96 (3.33) | 1.5 (F2/F0) |
| F3 | 39.60 (3.33) | 1.5 (F3/F0) |
| F4 | 41.22 (5.07) | 1.7 (F4/F0) |
a Numbers in parenthesis of GR50 values represent SE; b Sensitivity index for mesotrione calculated based on the GR50 values for each generation. F0 was used as the base population for the calculation.