Fall Armyworm (Lepidoptera: Noctuidae) Damage Relative to Infestation Level and Stage of Sweet Corn Development
Authors: GHIDlU, G. M.; DRAKE, G. E.
Source: Journal of Economic Entomology, Volume 82, Number 4, August 1989 , pp. 1197-1200(4)
Publisher: Entomological Society of America
Abstract:Plant damage and fresh-market yield looses from feeding by fall armyworms, Spodoptera frugiperda (J. E. Smith), at five stages of plant development and five levels of larval infestation were determined for sweet corn (Zea mays L.). Fall armyworms feed on leaves and on tissue developing within the whorls from the early-whorl to midwhorl stages of plant development. Tassel damage occurs primarily during the midwhorl to late-whorl stages of development and ceases after tassels begin to emerge and become exposed. Once tassels emerge, fall armyworms attack the developing ears, bore into the young ears, and cause fresh-market yield loss. Plants infested during the early-tassel stage of development have significantly fewer fresh-marketable ears at harvest compared with all other stages. Leaf-feeding damage, the percentage of damaged tassels, and the percentage of damaged ear shoots increase as the number of fall armyworm larvae per plant increases.
Document Type: Research Article
Publication date: 1989-08-01
- 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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