Abstract
Daily patterns of various behavioral rhythms in the cucumber looper, Anadevidia peponis, were observed under 12L-12D photoperiod and a constant temperature. They showed almost no rhythmicity in hatching and larval feeding, but a slight rhythmicity in 4th larval molting with a peak in photophase. Larval-pupal ecdysis occurred toward the end of a scotophase and the beginning of the next photophase, whereas the peak of adult emergence fell at the end of photophase. Nocturnal activity of the adult moths included three distinctive peaks. The first followed by a light-off and the second linked to a light-on were of flight activity observed in both sexes. Whereas, the third activity was related to their sexual behavior. Approximately in 7hrs from a light-off, the female released the sex pheromone for the following 3hrs, while the male was in flight for 1-1.5hrs. Although the male activity was well synchronized with the pheromone release of the female, the former was completely independent from the presence of female or sex pheromone.
