The Re-introduction and Recovery of Lydella stabulans grisescens, a Parasite of the European Corn Borer in Delaware1

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Lydlella stabulans grisescens Robineau-Defvoidy, an imported parasite of the European corn borer (Ostrinia nubilalis(Hübner)) was released in Delaware in June, 1959. Prior to these releases parasitism of the borer was practically nonexistent. A total of 2,933 adult parasites were released in six areas of the State.

In the fall of 1959 and winter of 1960 n total of 88 fields were sampled and 4,249borers were collected for parasite emergence.

L. stabulans grisescens was the only parasite recovered in any abundance. It was recovered from 16 of the 88 fields sampled. Parasitism in these fields ranged from 2.1% to 7.7%, with a mean of 3.45. Dispersal occurred in at least two different directions in every positive sampling area with one exception, where dispersal was northward only. Maximum distance of dispersal was at least 2 miles.

Document Type: Research Article

Publication date: February 1, 1962

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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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