Development of Autumn Populations of Cereal Aphids., Rhopalosiphum padi (L.) and Schizaphis graminum (Rondani) (Homoptera: Aphididae) and Their Effects on Winter Wheat in Washington State
Authors: Pike, K. S.; Schaffner, R. L.
Source: Journal of Economic Entomology, Volume 78, Number 3, June 1985 , pp. 676-680(5)
Publisher: Entomological Society of America
Abstract:Planting winter wheat in early September is a common practice in much of eastern Washington. A number of agronomic benefits are associated with planting early, but there is also a higher risk of cereal aphids infesting the crop with early planting. Caged experiments were conducted in the field during two crop seasons (1979–1980, 1981–1982) to assess population development and direct feeding effects of two cereal aphids, Rhopalosiphum padi (L.) and Schizaphis graminum (Rondani), on winter wheat planted in early September and infested during the two-leaf, four-leaf, and two-tiller stages of development. Aphids were introduced at a rate of two to four per plant per species and allowed to feed uninterrupted until cold weather ended their activity in November. Data taken were: plant height, heads per plant, root and foliage weights, test weight, and grain yield. R. padi, singly or in combination with S. graminum, was generally more prolific than S. graminum. The largest aphid populations encountered were on wheats infested initially at the two-leaf stage. Injury to wheat was highest where aphid infestations started at the two-leaf stage, intermediate to none at the four-leaf stage, and none at the two-tiller stage. Mixed populations on two-leaf wheats caused the greatest damage, followed by pure populations of R. padi. S. graminum generally caused the least damage.
Document Type: Research Article
Publication date: June 1985
- 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.
- Editorial Board
- Submit a Paper
- Subscribe to this Title
- Information for Advertisers
- Visit this journal's homepage
- ingentaconnect is not responsible for the content or availability of external websites