Within-plant distribution ofHeliothis zea(Boddie) F3generation eggs was determined from soybean samples,Glycine max(L.) Merrill, taken from fields in eastern North Carolina. Numbers of eggs on 22 and 29 plant parts during 1980 and 1981, respectively, were recorded.X2tests of homogeneity for the proportion of eggs on each part tested across fields of different phenologies within each date indicated that these proportions changed from field to field. Based on the proportion of eggs per plant part or the frequency of occurrence of each plant part, the preferred oviposition sites were both the upper and lower trifoliates; however, terminals were the most preferred on the basis of the proportional area represented by each plant part.