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Parasitization by Patasson luna (Hymenoptera: Mymaridae) of Alfalfa Weevil (Coleoptera: Curculionidae) Eggs Laid in Green Alfalfa Stems and in Litter

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A field experiment was conducted in southern Wisconsin during 1981 to investigate differential parasitization by Patasson luna (Girault) of alfalfa weevil, Hypera postica (Gyllenhal), eggs laid in green alfalfa stems and ground litter. Parasitization of weevil eggs laid in litter was higher than that of eggs laid in green stems throughout the period of major weevil oviposition activity (14 April through 27 May). Overall, 13.0% of eggs in green stems and 46.9% of eggs in litter were parasitized; adjusting for the proportion (27.3%) of weevil eggs deposited in ground litter, an estimated 22.4% of all eggs were parasitized. P. luna females encountered the same proportion of weevil egg clusters in green stems and litter, but on the average, parasitized a larger proportion of the eggs in litter clusters than in green stem clusters.

Document Type: Research Article

Publication date: February 1, 1983

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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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