Use of Artificial Lighting to Reduce Heliothis Spp. Populations in Cotton Fields1

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Abstract
Oviposition by female Heliothis spp. moths on cotton was reduced greatly when experimental plots were illuminated nightly with incandescent light. Egg deposition in 1 plot, illuminated continuously each night with a 1500-w lamp, was reduced 85% when compared with that in an unlighted plot. Oviposition also was reduced by 81% in a plot illuminated with a 1500-w lamp which was programmed to provide 5-minute periods of alternating light and darkness each night. In a 3rd plot of cotton, which was illuminated continuously each night with twenty 15-w lamps, egg deposition and larval infestations were 86 and 96% less, respectively, than in an unlighted plot. Beneficial arthropods were slightly more abundant in the unlighted plots, probably because these plots also were infested with greater numbers of prey.

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