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Parasitization of Introduced Puncturevine Weevils1 by Indigenous Chalcidoidea in Southern California2

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Abstract:

Two species of indigenous Pteromalidae, Habrocytus piercei Crawford and Neoctolaccus tylodermae (Ashmead), are reported and assessed as primary, solitary, larval, and pupal ectoparasites of Microlarinus lareynii (Jacquelin duVal) and M. lypriformis (Wollaston), weevils introduced into southern California for biological control of puncture vine, Tribulus terrestris L. Other Chalcidoidea were found to parasitize these biological-control agents, but they were of much lower incidence in rearings. The weevils and these 2 principal species of parasites apparently are widely associated in southern California. An average of 1/4 of the over wintering generations of M. lareynii was destroyed each fall by H. Piercei and N. tylodermae in 3 irrigated puncture vine plots sampled during 1967 and 1968.

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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