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Effects of fall armyworm, Spodoptera frugiperda (J. E. Smith), feeding on rice, Oryza sativa L., were studied in the field during 1983 and 1984. Increased S. frugiperda infestation levels resulted in increased rice defoliation, reduced plant and panicle density, and reduced rice yields. Yield component studies indicated that lower yields on infested plots were the result of reduced plant stand and panicle density. Kernel weight and percent filled kernels were not affected. Yield reductions were linearly related to S. frugiperda larval density. The linear model [E(y) = bx1] accounted for a large proportion of the variance of yield reduction during both years.
Document Type: Research Article
Publication date: October 1, 1986
More about this publication?
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.