Insect Parasites of the European Corn Borer Ostrinia nubilalis in Nebraska from 1948–1976 12

Abstract
Five exotic parasite species of the European corn borer, Ostrinia nubilalis (Hbn.), were introduced into Nebraska in 1948–1950. Only 3 species became established: a tachinid, Lydella thompsoni Herting (= grissescens Robineau-Desvoidy of Authors); an ichneumonid, Eriborus terebrans (Gravenhorst) (= Horogenes punctorius (Roman)); and a eulophid, Sympiesis viridula (Thomson) (= Eulophus viridulus ). Population trends for L. thompsoni and E. terebrans are reported for 2 counties for the years 1957–1971. No evidence has been found of L. thompsoni since 1965 but E. terebrans was widespread and present in low numbers in 1975 and 1976.

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