Technical Abstract: Novaluron, Diamond 0.83 EC, was evaluated for deposition on cotton and ovicidal efficacy against bollworm, Helicoverpa zea (Boddie), because of the need to use insecticides with modes of action different than synthetic pyrethroids. Novaluron at the lowest label recommended rate was aerially-applied with rotary atomizers and CP nozzles at spray rates of 19 l/ha (2 gpa) including addition of Aero Dyne-Amic adjuvant for one CP nozzle treatment, and CP nozzles at 47 l/ha (5 gpa). These treatments were compared to methomyl, Lannate LV, applied with CP nozzles at 19 l/ha (2 gpa) and an untreated check. Application equipment was setup to provide a Dv0.5 of 175 microns. Ovicidal efficacy was determined by collecting eggs from treatments at 0, 1, and 5 days after treatment (DAT). Test results showed greater deposition from the 47 l/ha application versus the 19 l/ha application and significantly greater deposition with the use of the adjuvant Aero Dyne-Amic. Total mortality (%) which included dead eggs (fertile, no larval hatch) and dead larvae (hatched, no feeding) was significantly higher than the untreated check (32.4%) on 0 DAT for 4 treatments: novaluron applied with rotary atomizers (74.7) and CP nozzles (69.1, 72.2) at 19(2) and 47(5) l/ha (gpa), respectively, and methomyl (78.4). At 1 DAT, total mortalities were: 69.2 % (novaluron/rotary atomizers) and 68.1 % (CP nozzles at 47 l/ha), and although differences were not statistically significant, the efficacy trend was the same except for a decrease with methomyl. These data show that novaluron is an effective ovicide for bollworm on cotton especially if aerially-applied with rotary atomizers at 19 l/ha or CP nozzles at 47 l/ha.