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Influence of Actual and Manual Black Cutworm (Lepidoptera: Noctuidae) Damage on Recovery and Grain Yield of Field Corn

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The percentage of recovery and yields of corn plants damaged by black cutworm, Agrotis ipsilon (Hufnagel), larvae were compared with manual damage. Significant losses in yield generally occurred before the four-leaf stage (84%of all damaged plants). The recovery of corn seedlings from actual damage and manual damage differed; 1982, 50 and 67%; 1983, 34 and 45%; 1984, 54 and 45%. Often seedlings damaged by black cutworm produced greater yields than did manually damaged plants. The degree of yield reduction depended on the position of the growing point within the plant relative to where the plant had been severed (i.e., above, at, or below the soil surface). Corn plants were much less likely to recover if cut by black cutworm below the soil surface. The possible use of manual cutting in screening corn genotypes for their ability to recover from black cutworm damage is discussed.

Document Type: Research Article

Publication date: December 1, 1989

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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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