Rating Dent Corn for Resistance to Rice Weevils1

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Increased planting of hybrid corn resistant to the rice Weevil Sitophilus oryzae (L.) has resulted in natural infestations too low for rating of breeding material and new hybrids for resistance. A method of supplementing natural infestations by broadcasting collected weevils through the yield tests was used. A system for evaluating corn yield test entries for resistance or susceptibility was developed which used both percent of ears infested and the degree of infestation. The resulting figure represents percent kernel infestation for the entry, which approximates actual loss in yield.

Document Type: Research Article

Publication date: December 1, 1964

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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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