Abstract
Parasites were reared from the green bug, Schizaphis graminum (Rondani); the corn leaf aphid, Rhopalosiphum maidis (Fitch); and R. padi (L.) collected in 1968 and 1969 from sorghum in Oklahoma. Seven parasites representing the families Braconidae, Eulophidae, Encyrtidae, Pteromalidae, and Cynipidae were recovered. Lysiphlebus testaceipes (Cresson) was the most abundant parasite of the green bug- but was not evident in the field until August. A phelinus nigritus (Howard) and A. varipes (Foerster) were recovered in June and July from the corn leaf aphid; in August they were found parasitizing the green bug. Both parasites were recovered for the first time from field collections in Oklahoma. The most abundant secondary parasite was Aphidencyrtus aphidivorus (Mayr). Other secondary parasites reared were Pachyneuron siphonophorae (Ashmead), Charips sp., and Asaphes lucens (Provancher).
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