Vogt, Elizabeth A.Nechols, James R.2013-03-252013-03-252013-03-25http://hdl.handle.net/2097/15412Citation: Vogt, E. & Nechols, J. (1991). Diel activity patterns of the squash bug egg parasitoid Gryon pennsylvanicum (Hymenoptera: Scelionidae). Annals of the Entomological Society of America, 84(3), 303-308. https://doi.org/10.1093/aesa/84.3.303Mated, 1-d-old female Gryon pennsylvanicum (Ashmead) exhibit a diel pattern of activity and rest. Daily activity (e.g., oviposition, walking, grooming, flying, feeding) is greatest during morning hours (0815-1215 hours CST). Two forms of resting behavior occur. “Motionless“ is a temporary state occurring mostly during afternoon hours. The more pronounced resting phase, “tucking,“ occurs in aggregated individuals of both sexes and is a form of rest previously undescribed in the parasitic Hymenoptera. The period of tucking persists from before lights go off to about 1 h after the lights go on. In individual wasps, activity resumes abruptly at about 0830 hours; by 0930 hours, all adults become active. Observations of a field population show a similar pattern of diel activity. The significance of these data for biological control programs is discussed.en-USPermission to archive granted by the Entomological Society of America, March 7, 2013. This article is the copyright property of the Entomological Society of America and may not be used for any commercial or other private purpose without specific written permission of the Entomological Society of America.InsectaGryon pennsylvanicumDiurnal behaviorBiological controlSquash bugText