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Regrowth of Corn Seedlings After Injury at Different Growth Stages by Black Cutworm, Agrotis ipsilon (Lepidoptera: Noctuidae) Larvae

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The regrowth capabilities of corn seedlings after leaf feeding and three types of Culling injury by natural and artificial infestations of black cutworm larvae at growth (leaf) stages 1 through 4 were determined in a 3-year study. Plants severed at progressively lower levels (above, at, or below the soil surface) and at progressively later stages of development (one- to four-leaf stage) produced significantly fewer ears and less grain than seedlings severed at higher levels and earlier in development. Leaf feeding injury did not significantly reduce ear production or plant yield. Ears produced by plants which sustained cutting injuries generally contained smaller quantities of grain than ears produced by uninjured plants. This information constitutes an important input for the refinement of black cutworm damage thresholds.

Document Type: Research Article

Publication date: April 1, 1983

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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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