Influence of Near-Ultraviolet Output of Attractant Lamps on Catches of Insects by Light Traps1

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Abstract
Near-ultraviolet output of attractant lamps affected the catches of insects in traps more than any other single factor in field studies at College Station, Texas. The numbers of bollworm moths, Heliothis zea (Boddie), and cabbage looper moths, Trichoplusia ni (Hübner), caught in traps having lamps with total emission ranging from 122 to 8100 milliwatts of near-ultraviolet energy were almost directly proportional to the near-ultraviolet output of attractant lamps. Increased diameters of funnels used in the traps gave increased catches of insects.

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