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Development of Action Thresholds for the Sugarbeet Root Maggot (Diptera: Otitidae)

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Blickenstaff-Peckenpaugh traps were used to quantify the relationship between density of the adult Tetanops myopaeformis (Roder) and sugarbeet yield loss caused by subsequent larval feeding. The cumulative number of flies trapped from the beginning of the growing season until peak fly collection was the most reliable and easy-to-use predictor of sugarbeet crop loss. Cumulative capture of 34 flies was adopted as the damage boundary, the minimum density required to produce detectable root yield loss. Action thresholds for larval management with insecticides were derived as a function of fly density, crop market value, larval control costs, and insecticide efficacy. Thresholds ranged from 38 to 61 cumulative flies per trap at peak. Practical recommendations for using the thresholds are discussed.

Document Type: Research Article

Publication date: April 1, 1989

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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.
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