Resistance of Bluegrass Cultivars to Biotypes C and E Greenbug (Homoptera: Aphididae)

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Damage of biotypes C and E greenbugs, Schizaphis graminum(Rondani), was determined on Canada bluegrass, Poa compressa (L.), and 23 cultivars of Kentucky bluegrass, Poa pratensisL. Damage ratings for each biotype were made 4 and 5 weeks postinfestation on bluegrass infested at 1 or 6 weeks postemergence. Both biotypes caused greater damage to plants infested at 1 week postemergence than with plants infested at 6 weeks postemergence; cultivars responded similarly to both biotypes 5 weeks postinfestation. Entries which showed the highest levels of resistance included Canada bluegrass and Kentucky bluegrass cultivars ‘South Dakota Common,’ ‘Nebraska Common,’ ‘Vantage,’; and ‘Sydsport.’

Document Type: Research Article

Publication date: October 1, 1983

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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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