There was a seasonal relationship in abundance of greenbug, Schizaphis graminum (Rondani), and corn leaf aphid, Rhopalosiphum maidis (Fitch), and several selected predators on field planted sorghum, wheat, and volunteer johnsongrass. As aphid numbers increased on any host, predators also increased. As parasitism decreased aphid population levels in grain sorghum, predator density decreased in that crop. Predator population levels in cotton began to increase at about the same time that predator density began to decrease in sorghum. Based on the relative similarity of the 2 habitats in terms of species composition, the 2 different plant communities became more intimately related as the growing season progressed. Of ca. 500,000 predators captured, marked and released in grain sorghum, 51 or 0.01% were recaptured in nearby cotton.
Document Type: Research Article
Publication date: April 1, 1976
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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.