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Effects of Lesser Cornstalk Borer (Lepidoptera: Pyralidae) Feeding at Selected Plant Growth Stages on Peanut Growth and Yield

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A greenhouse study was conducted to quantify the relationship of peanut (Arachis hypogaea L. var Florunner) plant damage to plant phenology and lesser cornstalk borer, Elasmopalpus lignose/lus (Zeller), larval density. Five plant growth stages, five lesser cornstalk borer (LCB) larval densities, and nine replicates were used in the study. Overall survival of larvae to adulthood was 46.90 ± 0.02% (x ± SEM). Less than 3.60% of pods were damaged when ≥4 larvae were used to infest a plant, whereas ≥7.08% were damaged when 6 or 8 larvae were used. A greater percentage of plants infested at stage ≥R5 had damaged seeds than those infested at ≥R3. Undamaged pod and seed, and root dry weight declined linearly with an increase in LCB density. An economic injury level of 3.63 to 5.44 larvae per row-meter was calculated based on 5.82% loss in undamaged pod dry weight per LCB.

Document Type: Research Article

Publication date: October 1, 1988

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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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