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Appraisal of Methods for Measuring Corn Kernel Resistance to Sitophilus zeamais1,2,3

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Several methods of measuring resistance of corn kernels to Sitophilus zeamais Motschulsky were evaluated for their efficiency and adaptability. Among the 6 methods studied (grain weigh t loss, total progeny, percent of damaged kernels, percent of parent mortality, percent of progeny mortality, and weight per weevil), total progeny rated comparable to or better than any of the other methods for each criterion used for evaluation. Progeny mortality data are of questionable usefulness when weevil populations exceed 3 or 4 weevils per gram of grain. Grain weight loss, the best economic indicator, rated well for all criteria as a good resistance measurement, except that genetic differences among genotypes were difficult to detect for this method.

Document Type: Research Article

Publication date: June 1, 1972

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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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