| Treatment | Glyphosate dose | Visual crop injury (%)b | Cob length | Cob deformity | Crop moisture | Crop yield | |||||||||
| g∙ae∙ha−1 | 1 WAT | 2 WAT | 4 WAT | cm | 0 - 10 | % | T∙ha−1 | ||||||||
| Untreated | 0 | a | 0 | b | 0 | b | 20.2 | a | 10.0 | a | 21.2 | a | 14.7 | a | |
| Spike | 900 | 0 | a | 0 | b | 0 | b | 20.1 | a | 9.9 | a | 21.0 | a | 14.6 | a |
| 1800 | 0 | a | 0 | b | 0 | b | 20.2 | a | 9.9 | a | 21.2 | a | 14.8 | a | |
| 3600 | 0 | a | 0 | b | 0 | b | 20.2 | a | 9.8 | a | 21.3 | a | 14.6 | a | |
| 7200 | 0.8 | a | 0.6 | ab | 0.9 | ab | 20.2 | a | 9.8 | a | 21.0 | a | 14.4 | a | |
| 1- to 2-leaf | 900 | 0 | a | 0 | b | 0 | b | 20.3 | a | 9.9 | a | 21.2 | a | 14.7 | a |
| 1800 | 0 | a | 0 | b | 0 | b | 20.4 | a | 9.9 | a | 21.4 | a | 14.4 | a | |
| 3600 | 0.3 | a | 0.2 | b | 0 | b | 20.0 | a | 9.8 | a | 21.1 | a | 14.3 | a | |
| 7200 | 0.6 | a | 1 | a | 1.4 | a | 20.0 | a | 9.4 | b | 21.0 | a | 14.3 | a | |
| LSD0.05 | 1.0 | 0.9 | 0.9 | 0.5 | 0.3 | 0.5 | 0.5 | ||||||||