Activity of Tobacco Hornworm and Corn Earworm Moths as Determined by Traps Equipped with Blacklight Lamps123

Abstract
Hourly sampling of catches in traps equipped with blacklight lamps indicated that tobacco hornworm moths. Manduca sexta (Johannson), are active all night. When the period of darkness from 8 PM to 5 AM is considered, maximum activity of males occurred between 9 and 10 PM, and a sharp rise took place then compared with activity between 8 and 9 PM. After 10 PM, a steady decline began and continued throughout the night. The activity of females was similar to that of males, except for the relatively lower level of male activity between 8 and 9 PM. Many more males than females were captured at all hours; thus the decline in male activity after 10 PM was steeper than that for females. Activity of corn earworm moths. Heliothis Zea (Boddie), increased until 1 AM. A steady and rather sharp decline occurred after 1 AM.

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