Against caged field-collected Anopheles quadrimaculatus Say adults, ultra-low volume (ULV) applications of 3.175 g a.i./0.40 ha (0.007 lb a.i.lac) of synergized permethrin (4% Aqua-Kontrol) gave excellent control (mean: 90%). Droplet collections on magnesium-oxide-coated (MGO) glass slides from 3 applications revealed mean deposition rate of 216 droplets/cm2 and 11-micron volume median diameter (VMD) (based on Aqua-Kontrol label spread factor of 0.61).