| Trifloxysulfuron is a broad-spectrum postemergence (POST) herbicide used in cotton (Gossypium hirsutum); however, cotton injury is a concern. The objective of this research was to determine conditions leading to injury. A planting date study was conducted in an attempt to evaluate cotton response over a range of climatological conditions (temperature and soil moisture). A separate experiment was conducted to evaluate response of five cotton cultivars recommended for use in Arkansas. Trifloxysulfuron was also applied following other herbicides to determine whether they could predispose cotton to trifloxysulfuron injury. Regardless of tnfloxysulfuron rate, planting date, cotton cultivar, or combination of other herbicides, cotton response was not severe (0 to 30%) and had dissipated by 27 DAT. Cotton yield and fiber characteristics were not affected by trifloxysulfuron. Under the conditions of these studies, the magnitude of injury was insufficient to determine causes for the severe injury that has been reported. |
