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Feeding Behavior of the Russian Wheat Aphid (Homoptera: Aphididae) on Wheat and Resistant and Susceptible Slender Wheatgrass

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Abstract:

Russian wheat aphid, DiuTaphis noxia (Mordvilko), poses a serious threat to the yield and quality of wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) production in the United States. Although, Land Grant College and Soil Conservation Service programs advocate the use of many cool- and WaiID-SeaSon forage grasses, many of these grasses serve as alternate hosts to the Russian wheat aphid. One form of cultural control is the development of-grass cultivars resistant to Russian wheat aphid for use in such programs, which could eliminate oversummering host plants for the aphid. Prior studies have indicated that slender wheatgrass (Elymus trachycaulum (Link) Gould ex Shinners), a species commonly found in reclamation areas, offers several potentially resistant plant introductions for use in development of resistant cultivars. The nature of Russian wheat aphid resistance at the behavioral level was studied with four slender wheatgrass entries, 'Pryor', PI 387888, PI 440100, and PI 440102 and 'TAM W-101' wheat on electronic feeding monitors. Aphids on the resistant plant introductions and, to a lesser degree, on 'Pryor' spent more total time engaged in baseline behavior, less time in phloem-ingestion behavior, and more time in nonphloem-ingestion behavior than did aphids on the susceptible entries 'TAM W-lOl' wheat and slender wheatgrass PI 387888. These results indicate that PI 440100 and PI 440102 could be used in the development of slender wheatgrass cultivars resistant to Russian wheat aphid.

Document Type: Research Article

Publication date: October 1, 1992

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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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