THE PARASITOID COMPLEX OF FIRST GENERATION OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE) LARVAE IN NORTHWEST OHIO

A survey of first generation European corn borer (Ostrinia nubilalis) lar­ vae was conducted during 1997 in six cornfields located in northwestern Ohio in rder to determine the larval parasitoid complex utilizing this host. Collected larvae were held under constant conditions until the larvae com­ pleted development or parasitoids emerged. The following species were recorded: Eriborus terebrans (Hymenoptera: Ichneumonidae), Macrocentrus grandii (Hymenoptera: Braconidae), Sympiesis viridula (Hymenoptera: Eu­ lophidae), and Lixophaga sp. (Diptera: Tachinidae), Levels of parasitism in the different fields ranged from 14.3 to 83.3%. Future research will include surveys of additional fields nd sampling of O. nubilalis over the entire sea­ son in the northwest Ohio region.