Plant Damage and Survival of European Corn Borer Cultures Reared for 16 Generations on Maize Plants and for 120 Generations on a Meridic Diet (One Generation per Year on Resistant or Susceptible Maize Plants, Eight Generations per Year on the Diet)12

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Abstract
Resistance to leaf feeding by first-generation Ostrinia nubilalis (Hübner) is conditioned by several genes. A polygenic system in maize plants probably does not guarantee against development of European corn borer biotypes. A biotype problem, however, should be less in a polygenic system than in a monogenic system. Our data support this statement because European corn borer cultures reared for 16 generations on inbred lines of dent maize, Zea mays L., (CI31A and Oh43) did not increase their ability to damage these highly resistant (nearly immune) or resistant genotypes of maize, and larvae reared for 16 generations on inbred line WF9 maintained their ability to damage this susceptible dent genotype of maize. The corn borer cultures were reared one generation each year on three inbred lines and eight generations each year on a meridic diet.