Abstract
Hormonal control of post-eclosion diuresis has been studied in several species of butterflies; Pieris brassicae (Nicolson 1976), Danaus plexippus (Dores, et al. 1979), Acraea horta, Danaus chrysippus, and Papilio demodocus (Nicolson 1980). We report here a post-eclosion diuresis in Heliothis zea (Lepidoptera: Noctuidae) that is responsible for a loss in weight equivalent to approximately 20% of the weight of a newly emerged adult during the first 6 hours after eclosion. Ligation between head and thorax immediately after eclosion reduced this diuretic weight loss to 7% of the emergence weight. In vivo assays of various nervous and neuroendocrine tissue homogenates suggest that a factor responsible for the post-eclosion diuresis may be located near the junction of the brain and the suboesophageal ganglion (SOG).
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