Eggs from tepa-sterilized corn earworm moths, Helio-this zea (Boddie), were exposed to Trichogramma evanescens West wood. The effects of tepa sterilization on the suitability of the host eggs as an oviposition site and the parasite’s development were determined. Eggs from untrcated moths (normal) were used for comparison. Generally, parasites preferred eggs from normal moths for oviposition over eggs from T♂ × U♀ or U♂ × T♀. However, no difference in the suitability for the parasite’s development in the eggs from the various crosses was shown. Host eggs as much as 72-96 hours old from all crosses were accepted for oviposition and produced parasites. A preliminary comparison of the suitability of eggs from normal moths and eggs from cobalt-60-treated male crosses was made. The data indicate that eggs from the latter cross will perform similarly to eggs from tepa-sterilized moths.