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Effects of Adhesive Materials and Host Location on Parasitization by a Uniparental Race of Trichogramma pretiosum

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Host finding by Trichogramma pretiosum Riley was measured by host parasitization under varying environmental conditions. Naturally laid eggs of the bollworm, Heliothis zea (Boddic), attracted T. pretiosum. Lower levels of parasitization were found for eggs attached on cards with acacia gum, distilled water, or shellac. There were no significant differences in parasitization for eggs attached with distilled water and acacia gum. The lowest levels of egg parasilization were obtained with shellac. Other factors tested to determine the effect of host location on host finding were: (1) substrate (cards vs. leaves), (2) leaf surface (top vs. underneath), (3) plant level (high vs. low), and (4) crop (cotton vs. corn). Cards tended to favor egg parasitization and somewhat over-shadowed the effect of plant (crop) and leaf surface but not that of plant level (height). Top leaf surfaces on cotton were slightly more attractive than under leaf surfaces to the parasites. The high level was preferred on cotton but apparently not on corn.

Document Type: Research Article

Publication date: December 15, 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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