European Corn Borer: Pheromone Polymorphism or Sibling Species?

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Science  03 Feb 1978:
Vol. 199, Issue 4328, pp. 555-556
DOI: 10.1126/science.199.4328.555


Electrophoretic analyses of the (Z) and (E) pheromone-attracted males of Ostrinia nubilalis (Hübner), the European corn borer, in an area of coexistence indicate that these strains are not freely interbreeding. Although the populations are morphologically indistinguishable, studies of allozyme, pheromone, and hybridization suggest that the (Z) and (E) entities are genetically differentiated, perhaps to the status of semi- or sibling species.