Confirm is a new insecticide for control of lepidopterous insects. Confirm Recieved Section 18 registrations for during 1994, 1995 and 1996 for control of Beet Armyworms in Cotton. While being used under these registrations, questions of Confirm's speed of kill, rainfastness, residual activity, application volume and rate arose. These issues were addressed in large and small plot field trials conducted from 1994 to 1996. While feeding cessation occurs within 8 - 10 hours, death occurs in 3-5 days with the primary cause of death being starvation and desiccation from blood loss. Retention of Confirm on leaf surfaces is affected most when rainfall occurs less than three hours after application. Confirm consistently gave control of BAW for periods of 10 - 14 days. For the two trials considered, application volumes of 1 and 3 GPA gave slightly slower control than 5 GPA. Reduced rates of Confirm have shown control of BAW however, these rates have been slower acting than the 0.125 lbs AI/A.