Performance of Maize Inbred Line B86 in Hybrid Combinations: Resistance to First- and Second-generation European Corn Borers (Lepidoptera: Pyralidae)

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Abstract:

Inbred line B86 was crossed with nine dent maize, Zea mays L., inbred lines. The nine lines, plus B86 and a check inbred line, and the nine single crosses, plus a single-cross check, were planted in a modified randomized block design during 4 years, with six replications each year. First-generation European corn borer (ECB), Ostrinia nubilalis Hübner, test plots were separate from the second-generation ECB test plots (two hills of three plants for each plot in each experiment). Plants in the first-generation tests were infested during the midwhorl stage of plant development, whereas plants in the second-generation tests were infested during an thesis. Plants in each test were infested with 12 egg masses (300 eggs) per plant in six applications of two masses, spaced 1 day apart. Leaf feeding damage in the first-generation tests and sheath-collar feeding damage and stalk damage in the second-generation tests were determined. B86 was resistant to first- and second-generation ECB; in combination with several susceptible inbred lines, B86 resistance showed variable levels of partial dominance for resistance to leaf feeding by first-generation ECB and for sheath-collar and stalk feeding resistance by second-generation ECB.

Document Type: Research Article

Publication date: February 1, 1985

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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