Southwestern Corn Borer: Comparison of Techniques for Infesting Corn for Plant Resistance Studies

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For infesting corn plants in plant resistance studies with Diatraea grandiosella (Dyar), infesting with larvae was as effective as the commonly used method of pinning borer eggs onto corn plants in providing uniformly heavy infestations at both the midwhorl and flowering stages of plant growth. Since processing larvae requires less time and effort than eggs, the use of larvae is a feasible alternative method. Leaf feeding ratings for corn infested in the mid-whorl stage were significantly higher with 30 than with 20 eggs or larvae/plant. Stalk damage ratings for corn plants infested at flowering did not differ significantly with 30 and 40 eggs or larvae/plant. No significant differences were found to exist between 1 and 2 applications of eggs or larvae for either plant stage infested except in 1979 when the number of entry and exit holes for corn infested at flowering was found to be higher with 2 applications.

Document Type: Research Article

Publication date: October 1, 1980

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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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