Natural control of cotton pests, including pink boll-worm, Pectinophora gossypiella (Sanders) favor pheromonal control of pink bollworm. Beneficial arthropods can help control pink bollworm, and other "secondary" cotton pest during the early part of the season. This early season suppression of cotton pests to reasonable levels can help gossyplure (pink bollworm sex pheromone) to work as a confusion technique. Beneficial arthropod populations were monitored on a weekly basis in 14 cotton fields in the Imperial Valley and weekly reports were presented to a cotton pest abatement district board. Comparison of insecticide application records with weekly population levels for various insects and spiders showed a trend of decreasing populations for most beneficial insects with increased use of insecticides.