| Control | ||||||
| Herbicide treatment | Rate g∙ai∙ha−1 | Timing | 4 WAA | 8 WAA | Density | Dry weight |
| % | # m−2 | g∙m−2 | ||||
| Weedy check | 0 | 0 | 59.0 c | 161.5 b | ||
| Weed-free check | 100 | 100 | 0.0 a | 0.0 a | ||
| Halosulfuron | 17.5 | PPI | 97 | 99 | 0.6 b | 0.1 a |
| Halosulfuron | 35 | PPI | 99 | 100 | 0.2 ab | 0.0 a |
| Halosulfuron | 70 | PPI | 100 | 100 | 0.3 ab | 0.0 a |
| Halosulfuron | 17.5 | PRE | 100 | 99 | 0.3 ab | 0.0 a |
| Halosulfuron | 35 | PRE | 100 | 100 | 0.0 a | 0.0 a |
| Halosulfuron | 70 | PRE | 100 | 100 | 0.0 a | 0.0 a |
| Halosulfuron | 17.5 | POST | 100 | 100 | 0.1 ab | 0.0 a |
| Halosulfuron | 35 | POST | 100 | 100 | 0.0 a | 0.0 a |
| Halosulfuron | 70 | POST | 100 | 100 | 0.0 a | 0.0 a |