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Recurrent Selection for Resistance in Corn to Tunneling by the Second-Brood Southwestern Corn Borer¹

Two cycles of recurrent selection based on individual plant performance using two selection criteria were conducted in a corn (Zea mays L.) population in an attempt to increase the level of resistance to stalk tunneling by the second-brood southwestern corn borer, Diatraea grandiosella (Dyar). The original population and the populations resulting from each cycle of selection were evaluated for extent of stalk tunneling in 1979, 1980, and 1981 at Mississippi State, Miss. Neither selecting undamaged plants nor those with reduced stalk tunneling was effective in significantly improving the level of resistance in the original population.

Key Words: Diatraea grandiosella (Dyar) • Zea mays L. • Insect damage • Maize

² Research geneticist and research entomologist, USDA-ARS, respeetively. Crop Science Res. Lab., Mississippi State, MS 39762.

Received for publication March 15, 1982.

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