Predicting Parasitism by Aphelinus asychis123

Laboratory populations that served as host for Aphelinus asychis (Walker) were composed of different combinations of the greenbug, Schizaphis graminum (Rondani); the corn leaf aphid, Rhopalosiphum maidis (Fitch); and the yellow sugarcane aphid Sipha flava (Forbes). Although the greatest number of mummies was observed at different temperature and longevity combinations for each species, the same general trend appeared when the number of mummies became large; the number of aphids parasitized increased with increasing temperature to an optimum temperature, and then decreased. A. asychis preferred the greenbug, followed by the corn leaf aphid, and then by the yellow sugarcane aphid.