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Evaluation of Russian Wheat Aphid (Homoptera: Aphididae) Damage on Resistant and Susceptible Hosts with Comparisons of Damage Ratings to Quantitative Plant Measurements

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Abstract:

Resistant and susceptible plant hosts of the Russian wheat aphid, Diuraphis Noxia (Mordvilko), were used to evaluate the relationships between damage rating indices and quantitative measurements of plant damage. The degree of association between percentage of leaf chlorosis, leaf rolling, and plant stunting, indicated that these occur independently. Damage ratings based on percentage of chlorosis accurately identified highly resistant and highly susceptible entries. When compared with quantitative plant measurements, the most reliable plant damage rating was plant stunting expressed as the percentage of height of a noninfested control. No significant relationships between leaf rolling and quantitative plant measurements were found. However, aphid-caused reductions in leaf turgor were closely related to the amount of chlorosis.

Document Type: Research Article

Publication date: June 1, 1993

More about this publication?
  • 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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