Black light traps have been shown to be an efficient means of trapping many lepidopterous pests which attack deciduous fruits. They can also be used in determining the flight habits of moths that are not attracted to baits, such as the peach twig borer and navel orangeworm. The black light traps offer a more accurate means of timing sprays for codling moths because they will attract insects that are comparatively young in terms of reproduction. In addition they would probably be more effective in attracting moths when populations are low.

The assistance of Ward Stanger, Farm Advisor at Large, University of California, Davis, is acknowledged for help in collecting and identifying specimens. Tim Wong, Laboratory Technician I, Department of Entomology, Berkeley also assisted with the project.