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Spatial distribution of the Colorado potato beetle, Leptinotarsa decemlineata (Say),on potatoes was studied by using Iwao's patchiness regression technique. Early larvae demonstrated a highly aggregated pattern that stabilized with the arrival of late larvae and adults. This information was used to prepare a sequential sampling plan with 20 larvae per plant as the economic threshold. At least 600 larvae were needed to detect significant differences from the critical threshold of 20 larvae per plant; up to 40 plants were needed when the infestation level was at or near the 20 larvae per plant threshold.
Document Type: Research Article
Publication date: April 1, 1986
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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.