Aerial applications at night in the San Joaquin Valley of California expand in order to protect bees during applications of parathion. Bees were present during the few hours of working daylight when applications could be made. Equipping ag aircraft with lights and flying at night allowed applicators to protect the bees. Bee kills became almost nonexistent, which pleased growers. From there, night applications continued to expand in another part of California to keep up with the work demand during busy parts of the season.