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Full-Text Articles in Entomology
Susceptibility Of Stable Flies (Diptera: Muscidae) From Southeastern Nebraska Beef Cattle Feedlots To Selected Insecticides And Comparison Of 3 Bioassay Techniques, Paula C. R. G. Marcon, Gustave D. Thomas, Blair Siegfried, John B. Campbell
Susceptibility Of Stable Flies (Diptera: Muscidae) From Southeastern Nebraska Beef Cattle Feedlots To Selected Insecticides And Comparison Of 3 Bioassay Techniques, Paula C. R. G. Marcon, Gustave D. Thomas, Blair Siegfried, John B. Campbell
Department of Entomology: Faculty Publications
Insecticide susceptibility of field populations of stable flies, tomoxys calcitrans (L.), was assayed using 3 exposure techniques: treated filter papers, treated glass petri dishes, and topical applications. Both topical applications and residual exposure to treated glass surfaces were suitable for testing susceptibility of stable flies to permethrin, stirofos, or methoxychlor. Residues on filter papers yielded inconsistent results with stirofos and methoxychlor. Significant concentration-mortality regression lines were generated with permethrin residues on filter papers, but ~1,000 times more insecticide was required to produce a toxic response when compared with permethrin residues on glass. Because of higher variability in response and the …
Oviposition Pheromone In The Simulium Damnosum Complex: Biological Activity Of Chemical Fractions From Gravid Ovaries, P. J. Mccall, R. R. Heath, B. D. Dueben, M. D. Wilson
Oviposition Pheromone In The Simulium Damnosum Complex: Biological Activity Of Chemical Fractions From Gravid Ovaries, P. J. Mccall, R. R. Heath, B. D. Dueben, M. D. Wilson
Entomology Papers from Other Sources
Communal oviposition in the Afrotropical blackfly species complex Simulium damnosum Theobald (Diptera: Simuliidae) is mediated by a pheromone emitted by freshly laid eggs. Previously, two compounds (designated peaks A and B) emanating from fresh eggs were shown to be associated with attractiveness to gravid blackflies in bioassay. The present study investigated the role of these compounds by testing the responses of wild-caught Simulium yahense in Ghana to fractionated hexane extracts of gravid ovaries prepared by gas chromatography (GC). Although the fractions were prepared from Sierra Leonean Simulium teonense, GC analysis of the emissions from fresh S. yahense eggs showed …