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Damage by the Cabbage Maggot, Hylemya (Delia) brassicae (Diptera: Anthomyiidae), to Brussels Sprouts

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The distribution of Hylemya (Delia) brassicae within fields and the effects of its feeding were studied in commercial brussels sprout (Brassica oleracea L., Capitata group) fields of coastal California. In the eighth week, significantly lower infestations were observed in the inner, untreated portions of a field compared to portions treated before planting or in untreated border plots. No differences were observed among six pretransplant treatments (including no treatment) on three sampling dates; by the sixth week after transplantation, the proportion of plants infested reached a mean of 0.492. No yield differences were observed among groups of plants with different numbers of H. brassicae feeding tunnels on their roots when the infestation occurred after the fourth week following transplantation. Management strategies based on these observations are discussed.

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.
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