Silver-topped panicles of bluegrass were as large as presumably normal panicles hut produced few if any viable seeds. Either maggots of the family Cloropidae or insect exit holes were found just above the last node in about 14% of examined silvertopped stems in 1958. Oscinella neocoxendix Sabrosky and O. coxendix (Fitch) were reared from stems with blasted seed heads. Seven other species of Chloropidae were collected by sweep net frol1l bluegrass fields. A life cycle of the flies was not completed in the laboratory but silver top was produced in the spring after flies had been released on caged bluegrass in the fall. Thc common type of silver top was not. produced by mechanical injury, virus transmission techniques or bluegrass plant bugs.
Document Type: Research Article
Publication date: December 1, 1962
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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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