Vertical-beat-sheet, ground-cloth, and beat-net techniques for sampling threecornered alfalfa hopper, Spissistilus festinus (Say), nymphs in soybeans, Glycine max (L.) Merrill, were evaluated in field experiments using systematic and random sampling. Beat-net and ground-cloth techniques were best for sampling S. festinus nymphs. Field surveys were also used to determine localization and spatial distribution of S. festinus nymphs and adults. No localization of individuals was detected. Distribution of nymphs appeared clumped with ground-cloth and vertical-beat-sheet sampling throughout the season and early in the season with beat-net sampling; however, beat-net sampling indicated that data from nymphs fit a Poisson distribution during the second field generation. Distribution of adults was clumped at the beginning of each generation's adult emergence but was generally random (Poisson)on subsequent sample dates. Data collected were used to develop threshold measurements for S. festinus nymphal populations and sequential sampling plans for adults based on sweep-net sampling and for nymphs based on beat-net and ground-cloth sampling techniques.
Document Type: Research Article
Publication date: April 1, 1987
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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.