Field and Laboratory Evaluations of Soybean Lines for Resistance to Corn Earworm Leaf Feeding

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Abstract:

Four F3 lines of soybean, Glycine max (L.) Merr., (IR 1,4,5, and 6), that are resistant to the Mexican bean beetle, Epilachna varivestis Mulsant, were evaluated in the laboratory and field for resistance to leaf feeding by the corn earworm, Heliothis zea (Boddie). In laboratory tests, larvae fed leaves of IR 5,6, and the resistant check, PI 229358, incurred higher combined larval and pupal mortality and weighed less after 14 days than those fed the susceptible check, 'Forrest'. Under natural field infestation, the incidence of resistance varied greatly among progenies of the 4 lines tested. IR 6 had a high (84%) incidence of resistance among its progeny, but none of the progeny of IR 5 were resistant. Sampling of individual IR 6 progeny rows revealed 2 progeny (5157 and 5176) with larval populations significantly (P = 0.05) less than those on Forrest.

Document Type: Research Article

Publication date: February 1, 1979

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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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