Optimum aerial application parameters were determined for Tracer™, a "reduced risk" insect control material for lepidopterous cotton pests. A season-long lepidopterous insect control program was conducted with two spray rates, two droplet sizes, and two insecticides – Tracer™ and a producer standard composed of selections of Karate^®, Larvin^®, Mattch^®, and Condor^®XL. Detailed deposition sampling and laboratory bioassays were conducted on open and closed canopy cotton. Performance of Tracer™ was superior with the 5 gallon per acre spray rate and droplet sizes of 200- m volume median diameter.