Juvenile hormone: Evidence for a role in the feeding rhythm ofOncopeltus fasciatus (Dallas)

Summary The diurnal feeding rhythm of female milkweed bugs was damped when fed nonhost seeds. Juvenoid treatment partially restored the normal rhythm. Precocene II-treated milkweed seed-fed females fed arrhythmicly during the light phase without reduced total feeding activity. This effect was largely prevented by simultaneous treatment with JH III.I thank Dr Judith H. Willis, Univ. of Illinois, for providing facilities, Meyer Schwartz of ARS, USDA, Beltsville, MD, USA, for providing the precocene II, and Dr W. S. Bowers, formerly of ARS, USDA, Beltsville, MD, for supplying the juvenoid. This work was supported in part by grant AG-00248 from the National Institutes of Health to J. H. Willis.