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Dispersal of the Onion Fly (Diptera: Anthomyiidae) and Larval Damage in Rotated Onion Fields

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Onion !lies, Delia antique (Meigen), trapped in water pan traps in nonhost vegetation throughout a 740-ha muck, were captured in large numbers up to 1.5 km from overwintering sites in May and June during the first !light. Few flies were captured in nonhost areas during the second !light in July. Similar, high levels of onion maggot (OM) damage were observed in 10 small onion plots planted in organic soils in the 740-ha muck at locations varying from 0.4 to 1.5 km distant from OM overwintering sites. Damage in untreated plots in commercial fields not planted to onions the previous year was related to distance from overwintering sites (fields planted to onions the previous year), and declined with increasing distance. Lowest damage levels, comparable to damage measured in chlorpyrifos-treated research plots, were observed in fields located in small, isolated mucks that had been planted to another crop the previous growing season.

Document Type: Research Article

Publication date: April 1, 1988

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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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