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Studies of Interspecific Competition Between Tetrastichus incertus1 and Bathyplectes curculionis2, Larval Endoparasites of the Alfalfa Weevil, 3,4

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Instar preference and competition tests were conducted between Tetrastichus incertus (Ratzeburg) and Bathyplectes curculionis (Thomson) for their larval host, the alfalfa weevil, Hypera postica (Gyllenhal). T. incertus females ignored 1st-stage larvae and attacked 2nd to 4th-instars. B. curculionis females preferred 1st to 3rd-instars over 4th-instars. Parasitism by B. curculionis increased under competition, while T. incertus parasitism decreased.

Document Type: Research Article

Publication date: June 1, 1970

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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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