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Yield Losses in Winter Grains Caused by Cereal Aphids (Homoptera: Aphididae) in South Dakota

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Yield losses in 'Rough Rider' winter wheat, Triticum aestivum L., and 'Cougar' winter rye, Secale cereale L., caused by feeding of Schizaphis graminum (Rondani), Rhopalosiphum padi (L.), and Macrosiphum avenae (F.) were each measured for 3 yr in South Dakota fields. Caged plots were artificially colonized with aphids for 10 d when plants were in three different growth stages; losses in components of yield were measured at harvest. Greatest losses of yield were caused when aphids fed during the seedling (2-3 leaf) stage in autumn; mean densities of 25-30 aphids per stem caused reductions of 50% in some components of yield at this stage. Lower yield losses were recorded for similar aphid population densities when they fed in spring during the boot stage (immature in florescence invested in leaf sheath), and no losses were observed when aphids fed on mature (dough stage) plants. Schizaphis graminum and R. padi were more damaging than M. avenaeat similar population densities. Winter wheat was more vulnerable than rye to yield losses caused by aphid feeding.

Document Type: Research Article

Publication date: February 1, 1988

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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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