Toxic Effects of Synthetic Juvenile Hormones on Several Aphid1 Species2

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Nine synthetic juvenile hormone mimics were screened as toxicants against the pea aphid, Acyrthosiphun pisum (Harris), and the raspberry aphid, Amphorophora agathonica (Hottes). First- and second-instar and adult aphids exposed to plant material dipped in 0.1% hormone solutions indicated that certain structures were most toxie to the pea aphid (Hoffman-LaRoche no 8-4314 and Stauffer R 20458) while others were essentially nontoxic (Hoffman- La Roche RO 20-3(100) or almost equitoxic (Zoecon ZR 512) to both species. Feeding eight different aphid species on plant material dipped in 0.1% Zoecon ZR-512 gave a mortality range of 18% for the turnip aphid, Hyadaphis psendobrassicae (Davis), to 73% for the pea aphid. Exposure to lower levels of hormone did not always produce direct toxic results but did yield a wide range of morphological abnormalities and considerably altered reproduction.

Document Type: Research Article

Publication date: October 1, 1973

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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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