timing of insecticide sprays can be improved if direct information is available on insect activity in crop plantings. In apple, pear, and walnut orchards, detection of the activity of the adult stage of the codling moth is required for optimum use of insecticides. Many insecticides used for codling moth control are most effective for direct and residual action against the moth stage, but knowledge of moth activity is important regardless of the stage of the insect against which the insecticide is effective.