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An absolute sampling technique for northern and western corn rootworm, Diabrotica barberi Smith and Lawrence (NCR) and D. virgifera virgifera LeConte (WCR), respectively, adult emergence was developed that could be used in cornfields of different inter-row spacings. The sampling technique was used in 12 commercially grown cornfields from 1979–1983 to obtain estimates of sampling variability. The optimum sampling scheme for emergence of NCR and WCR field populations involved sampling at a single site within each of a large number of quadrats located throughout the field. Sample sizes needed to obtain an estimate with a standard error within 10% of the mean for WCR and NCR are 80 and 222, respectively.
Document Type: Research Article
Publication date: December 1, 1985
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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.