A New Record of a Trichogramma Species Parasitizing the Cereal Leaf Beetle1,2

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A biological control program against a foreign pest of cereal crops,Oulema melanopus (L.), was initiated in 1966 by the U. S. Department of Agriculture. One phase of this program was a survey for existing natural enemies that may have become adapted to this new pest. In 1967 a Trichogramma species emerged from field-collected eggs of O. melanopus in Berrien County, Michigan. Subsequently, parasitized eggs and adult parasites were collected in 2 additional counties. The Trichogramma first was identified as T. evanescens West wood. However, results of crossing tests and developmental time studies show that it is not this species. Consideration is being given to improvement of acceptance of O. melanopus as a host by selective breeding of the parasite.

Document Type: Research Article

Publication date: October 1, 1969

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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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