| 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 c | 6.1 e | 30.6 c | ||
| Weed-free check | 100 | 100 a | 0.0 a | 0.0 a | ||
| Halosulfuron | 17.5 | PPI | 94 | 97 a | 0.2 ab | 0.6 ab |
| Halosulfuron | 35 | PPI | 95 | 97 a | 0.2 ab | 0.9 ab |
| Halosulfuron | 70 | PPI | 92 | 100 a | 0.4 ab | 1.1 ab |
| Halosulfuron | 17.5 | PRE | 85 | 97 a | 1.3 bcd | 4.2 abc |
| Halosulfuron | 35 | PRE | 89 | 97 a | 0.8 abc | 1.5 ab |
| Halosulfuron | 70 | PRE | 95 | 99 a | 0.3 ab | 1.3 ab |
| Halosulfuron | 17.5 | POST | 68 | 47 b | 5.0 de | 20.6 c |
| Halosulfuron | 35 | POST | 65 | 54 b | 3.6 cde | 8.5 bc |
| Halosulfuron | 70 | POST | 75 | 65 b | 3.5 cde | 8.2 bc |