Circadian Activity of Heliothis zea1 at Different Temperatures Studied with an Acoustic Actograph

Publisher Website
Google Scholar
Abstract
An acoustic actograph was designed and used to measure the circadian activity pattern of the corn earworm moth, Heliothis zea. This device detects the sounds made by flying moths in a chamber and records them automatically on a microprocessor-based system. At low temperatures, H. zea is active during the 1st 6 h following nightfall. At higher temperatures, the activity increases and lasts longer. The activity is also presented as a function of age, and the crepuscular activity is examined. A burst of activity at dawn suggests that the attraction of moths to light may be a crepuscular behavior. Possible implications of the circadian activity to light trapping is discussed.