Performance of Maize Inbred Line DE811 in Hybrid Combinations: Resistance to First- and Second-Generation European Corn Borers (Lepidoptera: Pyralidae)
Authors: GUTHRIE, W. D.; HAWK, J. A.; JARVIS, J. L.
Source: Journal of Economic Entomology, Volume 82, Number 6, December 1989 , pp. 1804-1806(3)
Publisher: Entomological Society of America
Abstract:Inbred line DE8l! was crossed with 12 dent maize, Zea mays L., inbred lines. The 12 inbred lines, plus DE8l! and a check inbred line, and 12 single crosses, plus two single-cross checks, were planted in a modified randomized block design for 3 yr, with five replications each year. First-generation European corn borer, Ostrinia nubilalis Hübner, plots were separate from the second-generation European corn borer 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 anthesis. Plants in each test were infested with 12 egg masses(300 eggs) per plant in six applications of two masses, spaced 1 d apart. Leaf-feeding ratings in the first-generation tests were made 3 wk after egg hatch. Sheath-collar feeding ratings and stalk damage were made 60 d after egg hatch in the second-generation tests. In combination with several susceptible inbred lines, DE811 resistance showed partial dominance for resistance to leaf feeding by first-generation European corn borers and for resistance to sheath-collar feeding and stalk damage by second-generation European corn borers. Single crosses of DE811 × resistant inbred lines had high resistance to both European corn borer generations.
Document Type: Research Article
Publication date: 1989-12-01
- 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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