Effects of Pea Aphids (Homoptera: Aphididae) on the Nitrogen Fixing Activity of Bacteria in the Root Nodules of Pea Plants

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Abstract:

Different numbers of pea aphids, Acyrthosiphon pisum (Harris), were kept on pea plants, Pisum sativum (L.), bearing root nodules containing the symbiotic bacteria Rhizobium leguminosarum (Frank). Aphid feeding decreased acetylene-reducing activity of the bacteria by as much as 86%, whole plant dry weight up to 74%, nodule weight and number by 77 and 78%, respectively, and nitrogen content of plant tissue by a maximum of 84%. These effects were significant in both young plants 11 days after germination and in more mature plants after pod formation and were proportional to the number of aphids infesting the plants.

Document Type: Research Article

Publication date: June 1, 1984

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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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